package divconq.json3.base;
import java.io.*;
import divconq.json3.Base64Variant;
import divconq.json3.JsonToken;
import divconq.json3.io.CharTypes;
import divconq.json3.io.IOContext;
import divconq.json3.util.ByteArrayBuilder;
import divconq.json3.util.TextBuffer;
import static divconq.json3.JsonTokenId.*;
/**
* This is a concrete implementation of JsonParser, which is
* based on a {@link java.io.Reader} to handle low-level character
* conversion tasks.
*/
public class ReaderBasedJsonParser extends ParserBase
{
// Latin1 encoding is not supported, but we do use 8-bit subset for
// pre-processing task, to simplify first pass, keep it fast.
protected final static int[] _icLatin1 = CharTypes.getInputCodeLatin1();
/*
/**********************************************************
/* Input configuration
/**********************************************************
*/
/**
* Reader that can be used for reading more content, if one
* buffer from input source, but in some cases pre-loaded buffer
* is handed to the parser.
*/
protected Reader _reader;
/**
* Current buffer from which data is read; generally data is read into
* buffer from input source.
*/
protected char[] _inputBuffer;
/*
/**********************************************************
/* Parsing state
/**********************************************************
*/
/**
* Flag that indicates that the current token has not yet
* been fully processed, and needs to be finished for
* some access (or skipped to obtain the next token)
*/
protected boolean _tokenIncomplete = false;
/*
/**********************************************************
/* Life-cycle
/**********************************************************
*/
/*
* Method called when input comes as a {@link java.io.Reader}, and buffer allocation
* can be done using default mechanism.
*/
public ReaderBasedJsonParser(IOContext ctxt, Reader r)
{
super(ctxt);
_reader = r;
_inputBuffer = ctxt.allocTokenBuffer();
_inputPtr = 0;
_inputEnd = 0;
}
@Override
public int releaseBuffered(Writer w) throws IOException {
int count = _inputEnd - _inputPtr;
if (count < 1) { return 0; }
// let's just advance ptr to end
int origPtr = _inputPtr;
w.write(_inputBuffer, origPtr, count);
return count;
}
@Override public Object getInputSource() { return _reader; }
@Override
protected boolean loadMore() throws IOException
{
_currInputProcessed += _inputEnd;
_currInputRowStart -= _inputEnd;
if (_reader != null) {
int count = _reader.read(_inputBuffer, 0, _inputBuffer.length);
if (count > 0) {
_inputPtr = 0;
_inputEnd = count;
return true;
}
// End of input
_closeInput();
// Should never return 0, so let's fail
if (count == 0) {
throw new IOException("Reader returned 0 characters when trying to read "+_inputEnd);
}
}
return false;
}
protected char getNextChar(String eofMsg) throws IOException {
if (_inputPtr >= _inputEnd) {
if (!loadMore()) { _reportInvalidEOF(eofMsg); }
}
return _inputBuffer[_inputPtr++];
}
@Override
protected void _closeInput() throws IOException {
/* 25-Nov-2008, tatus: As per [JACKSON-16] we are not to call close()
* on the underlying Reader, unless we "own" it, or auto-closing
* feature is enabled.
* One downside is that when using our optimized
* Reader (granted, we only do that for UTF-32...) this
* means that buffer recycling won't work correctly.
*/
if (_reader != null) {
if (_ioContext.isResourceManaged()) {
_reader.close();
}
_reader = null;
}
}
/*
/**********************************************************
/* Public API, data access
/**********************************************************
*/
/*
* Method for accessing textual representation of the current event;
* if no current event (before first call to {@link #nextToken}, or
* after encountering end-of-input), returns null.
* Method can be called for any event.
*/
@Override
public final String getText() throws IOException
{
JsonToken t = _currToken;
if (t == JsonToken.VALUE_STRING) {
if (_tokenIncomplete) {
_tokenIncomplete = false;
_finishString(); // only strings can be incomplete
}
return _textBuffer.contentsAsString();
}
return _getText2(t);
}
// // // Let's override default impls for improved performance
// @since 2.1
@Override
public final String getValueAsString() throws IOException
{
if (_currToken == JsonToken.VALUE_STRING) {
if (_tokenIncomplete) {
_tokenIncomplete = false;
_finishString(); // only strings can be incomplete
}
return _textBuffer.contentsAsString();
}
return super.getValueAsString(null);
}
// @since 2.1
@Override
public final String getValueAsString(String defValue) throws IOException {
if (_currToken == JsonToken.VALUE_STRING) {
if (_tokenIncomplete) {
_tokenIncomplete = false;
_finishString(); // only strings can be incomplete
}
return _textBuffer.contentsAsString();
}
return super.getValueAsString(defValue);
}
protected final String _getText2(JsonToken t) {
if (t == null) {
return null;
}
switch (t.id()) {
case ID_FIELD_NAME:
return _parsingContext.getCurrentName();
case ID_STRING:
// fall through
case ID_NUMBER_INT:
case ID_NUMBER_FLOAT:
return _textBuffer.contentsAsString();
default:
return t.asString();
}
}
@Override
public final char[] getTextCharacters() throws IOException
{
if (_currToken != null) { // null only before/after document
switch (_currToken.id()) {
case ID_FIELD_NAME:
if (!_nameCopied) {
String name = _parsingContext.getCurrentName();
int nameLen = name.length();
if (_nameCopyBuffer == null) {
_nameCopyBuffer = _ioContext.allocNameCopyBuffer(nameLen);
} else if (_nameCopyBuffer.length < nameLen) {
_nameCopyBuffer = new char[nameLen];
}
name.getChars(0, nameLen, _nameCopyBuffer, 0);
_nameCopied = true;
}
return _nameCopyBuffer;
case ID_STRING:
if (_tokenIncomplete) {
_tokenIncomplete = false;
_finishString(); // only strings can be incomplete
}
// fall through
case ID_NUMBER_INT:
case ID_NUMBER_FLOAT:
return _textBuffer.getTextBuffer();
default:
return _currToken.asCharArray();
}
}
return null;
}
@Override
public final int getTextLength() throws IOException
{
if (_currToken != null) { // null only before/after document
switch (_currToken.id()) {
case ID_FIELD_NAME:
return _parsingContext.getCurrentName().length();
case ID_STRING:
if (_tokenIncomplete) {
_tokenIncomplete = false;
_finishString(); // only strings can be incomplete
}
// fall through
case ID_NUMBER_INT:
case ID_NUMBER_FLOAT:
return _textBuffer.size();
default:
return _currToken.asCharArray().length;
}
}
return 0;
}
@Override
public final int getTextOffset() throws IOException
{
// Most have offset of 0, only some may have other values:
if (_currToken != null) {
switch (_currToken.id()) {
case ID_FIELD_NAME:
return 0;
case ID_STRING:
if (_tokenIncomplete) {
_tokenIncomplete = false;
_finishString(); // only strings can be incomplete
}
// fall through
case ID_NUMBER_INT:
case ID_NUMBER_FLOAT:
return _textBuffer.getTextOffset();
default:
}
}
return 0;
}
@Override
public byte[] getBinaryValue(Base64Variant b64variant) throws IOException
{
if (_currToken != JsonToken.VALUE_STRING &&
(_currToken != JsonToken.VALUE_EMBEDDED_OBJECT || _binaryValue == null)) {
_reportError("Current token ("+_currToken+") not VALUE_STRING or VALUE_EMBEDDED_OBJECT, can not access as binary");
}
/* To ensure that we won't see inconsistent data, better clear up
* state...
*/
if (_tokenIncomplete) {
try {
_binaryValue = _decodeBase64(b64variant);
} catch (IllegalArgumentException iae) {
throw _constructError("Failed to decode VALUE_STRING as base64 ("+b64variant+"): "+iae.getMessage());
}
/* let's clear incomplete only now; allows for accessing other
* textual content in error cases
*/
_tokenIncomplete = false;
} else { // may actually require conversion...
if (_binaryValue == null) {
ByteArrayBuilder builder = _getByteArrayBuilder();
_decodeBase64(getText(), builder, b64variant);
_binaryValue = builder.toByteArray();
}
}
return _binaryValue;
}
@Override
public int readBinaryValue(Base64Variant b64variant, OutputStream out) throws IOException
{
// if we have already read the token, just use whatever we may have
if (!_tokenIncomplete || _currToken != JsonToken.VALUE_STRING) {
byte[] b = getBinaryValue(b64variant);
out.write(b);
return b.length;
}
// otherwise do "real" incremental parsing...
byte[] buf = _ioContext.allocBase64Buffer();
try {
return _readBinary(b64variant, out, buf);
} finally {
_ioContext.releaseBase64Buffer(buf);
}
}
protected int _readBinary(Base64Variant b64variant, OutputStream out, byte[] buffer) throws IOException
{
int outputPtr = 0;
final int outputEnd = buffer.length - 3;
int outputCount = 0;
while (true) {
// first, we'll skip preceding white space, if any
char ch;
do {
if (_inputPtr >= _inputEnd) {
loadMoreGuaranteed();
}
ch = _inputBuffer[_inputPtr++];
} while (ch <= INT_SPACE);
int bits = b64variant.decodeBase64Char(ch);
if (bits < 0) { // reached the end, fair and square?
if (ch == '"') {
break;
}
bits = _decodeBase64Escape(b64variant, ch, 0);
if (bits < 0) { // white space to skip
continue;
}
}
// enough room? If not, flush
if (outputPtr > outputEnd) {
outputCount += outputPtr;
out.write(buffer, 0, outputPtr);
outputPtr = 0;
}
int decodedData = bits;
// then second base64 char; can't get padding yet, nor ws
if (_inputPtr >= _inputEnd) {
loadMoreGuaranteed();
}
ch = _inputBuffer[_inputPtr++];
bits = b64variant.decodeBase64Char(ch);
if (bits < 0) {
bits = _decodeBase64Escape(b64variant, ch, 1);
}
decodedData = (decodedData << 6) | bits;
// third base64 char; can be padding, but not ws
if (_inputPtr >= _inputEnd) {
loadMoreGuaranteed();
}
ch = _inputBuffer[_inputPtr++];
bits = b64variant.decodeBase64Char(ch);
// First branch: can get padding (-> 1 byte)
if (bits < 0) {
if (bits != Base64Variant.BASE64_VALUE_PADDING) {
// as per [JACKSON-631], could also just be 'missing' padding
if (ch == '"' && !b64variant.usesPadding()) {
decodedData >>= 4;
buffer[outputPtr++] = (byte) decodedData;
break;
}
bits = _decodeBase64Escape(b64variant, ch, 2);
}
if (bits == Base64Variant.BASE64_VALUE_PADDING) {
// Ok, must get padding
if (_inputPtr >= _inputEnd) {
loadMoreGuaranteed();
}
ch = _inputBuffer[_inputPtr++];
if (!b64variant.usesPaddingChar(ch)) {
throw reportInvalidBase64Char(b64variant, ch, 3, "expected padding character '"+b64variant.getPaddingChar()+"'");
}
// Got 12 bits, only need 8, need to shift
decodedData >>= 4;
buffer[outputPtr++] = (byte) decodedData;
continue;
}
}
// Nope, 2 or 3 bytes
decodedData = (decodedData << 6) | bits;
// fourth and last base64 char; can be padding, but not ws
if (_inputPtr >= _inputEnd) {
loadMoreGuaranteed();
}
ch = _inputBuffer[_inputPtr++];
bits = b64variant.decodeBase64Char(ch);
if (bits < 0) {
if (bits != Base64Variant.BASE64_VALUE_PADDING) {
// as per [JACKSON-631], could also just be 'missing' padding
if (ch == '"' && !b64variant.usesPadding()) {
decodedData >>= 2;
buffer[outputPtr++] = (byte) (decodedData >> 8);
buffer[outputPtr++] = (byte) decodedData;
break;
}
bits = _decodeBase64Escape(b64variant, ch, 3);
}
if (bits == Base64Variant.BASE64_VALUE_PADDING) {
/* With padding we only get 2 bytes; but we have
* to shift it a bit so it is identical to triplet
* case with partial output.
* 3 chars gives 3x6 == 18 bits, of which 2 are
* dummies, need to discard:
*/
decodedData >>= 2;
buffer[outputPtr++] = (byte) (decodedData >> 8);
buffer[outputPtr++] = (byte) decodedData;
continue;
}
}
// otherwise, our triplet is now complete
decodedData = (decodedData << 6) | bits;
buffer[outputPtr++] = (byte) (decodedData >> 16);
buffer[outputPtr++] = (byte) (decodedData >> 8);
buffer[outputPtr++] = (byte) decodedData;
}
_tokenIncomplete = false;
if (outputPtr > 0) {
outputCount += outputPtr;
out.write(buffer, 0, outputPtr);
}
return outputCount;
}
/*
/**********************************************************
/* Public API, traversal
/**********************************************************
*/
/*
* @return Next token from the stream, if any found, or null
* to indicate end-of-input
*/
@Override
public final JsonToken nextToken() throws IOException
{
_numTypesValid = NR_UNKNOWN;
/* First: field names are special -- we will always tokenize
* (part of) value along with field name to simplify
* state handling. If so, can and need to use secondary token:
*/
if (_currToken == JsonToken.FIELD_NAME) {
return _nextAfterName();
}
if (_tokenIncomplete) {
_skipString(); // only strings can be partial
}
int i = _skipWSOrEnd();
if (i < 0) { // end-of-input
/* 19-Feb-2009, tatu: Should actually close/release things
* like input source, symbol table and recyclable buffers now.
*/
close();
return (_currToken = null);
}
/* First, need to ensure we know the starting location of token
* after skipping leading white space
*/
_tokenInputTotal = _currInputProcessed + _inputPtr - 1;
_tokenInputRow = _currInputRow;
_tokenInputCol = _inputPtr - _currInputRowStart - 1;
// finally: clear any data retained so far
_binaryValue = null;
// Closing scope?
if (i == INT_RBRACKET) {
if (!_parsingContext.inArray()) {
_reportMismatchedEndMarker(i, '}');
}
_parsingContext = _parsingContext.getParent();
return (_currToken = JsonToken.END_ARRAY);
}
if (i == INT_RCURLY) {
if (!_parsingContext.inObject()) {
_reportMismatchedEndMarker(i, ']');
}
_parsingContext = _parsingContext.getParent();
return (_currToken = JsonToken.END_OBJECT);
}
// Nope: do we then expect a comma?
if (_parsingContext.expectComma()) {
i = _skipComma(i);
}
/* And should we now have a name? Always true for
* Object contexts, since the intermediate 'expect-value'
* state is never retained.
*/
boolean inObject = _parsingContext.inObject();
if (inObject) {
// First, field name itself:
String name = (i == INT_QUOTE) ? _parseName() : _handleOddName(i);
_parsingContext.setCurrentName(name);
_currToken = JsonToken.FIELD_NAME;
i = _skipColon();
}
// Ok: we must have a value... what is it?
JsonToken t;
switch (i) {
case '"':
_tokenIncomplete = true;
t = JsonToken.VALUE_STRING;
break;
case '[':
if (!inObject) {
_parsingContext = _parsingContext.createChildArrayContext(_tokenInputRow, _tokenInputCol);
}
t = JsonToken.START_ARRAY;
break;
case '{':
if (!inObject) {
_parsingContext = _parsingContext.createChildObjectContext(_tokenInputRow, _tokenInputCol);
}
t = JsonToken.START_OBJECT;
break;
case ']':
case '}':
// Error: neither is valid at this point; valid closers have
// been handled earlier
_reportUnexpectedChar(i, "expected a value");
case 't':
_matchTrue();
t = JsonToken.VALUE_TRUE;
break;
case 'f':
_matchFalse();
t = JsonToken.VALUE_FALSE;
break;
case 'n':
_matchNull();
t = JsonToken.VALUE_NULL;
break;
case '-':
/* Should we have separate handling for plus? Although
* it is not allowed per se, it may be erroneously used,
* and could be indicate by a more specific error message.
*/
t = _parseNegNumber();
break;
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
t = _parsePosNumber(i);
break;
default:
t = _handleOddValue(i);
break;
}
if (inObject) {
_nextToken = t;
return _currToken;
}
_currToken = t;
return t;
}
private final JsonToken _nextAfterName()
{
_nameCopied = false; // need to invalidate if it was copied
JsonToken t = _nextToken;
_nextToken = null;
// Also: may need to start new context?
if (t == JsonToken.START_ARRAY) {
_parsingContext = _parsingContext.createChildArrayContext(_tokenInputRow, _tokenInputCol);
} else if (t == JsonToken.START_OBJECT) {
_parsingContext = _parsingContext.createChildObjectContext(_tokenInputRow, _tokenInputCol);
}
return (_currToken = t);
}
/*
@Override
public boolean nextFieldName(SerializableString str)
throws IOException
*/
// note: identical to one in UTF8StreamJsonParser
@Override
public final String nextTextValue() throws IOException
{
if (_currToken == JsonToken.FIELD_NAME) { // mostly copied from '_nextAfterName'
_nameCopied = false;
JsonToken t = _nextToken;
_nextToken = null;
_currToken = t;
if (t == JsonToken.VALUE_STRING) {
if (_tokenIncomplete) {
_tokenIncomplete = false;
_finishString();
}
return _textBuffer.contentsAsString();
}
if (t == JsonToken.START_ARRAY) {
_parsingContext = _parsingContext.createChildArrayContext(_tokenInputRow, _tokenInputCol);
} else if (t == JsonToken.START_OBJECT) {
_parsingContext = _parsingContext.createChildObjectContext(_tokenInputRow, _tokenInputCol);
}
return null;
}
// !!! TODO: optimize this case as well
return (nextToken() == JsonToken.VALUE_STRING) ? getText() : null;
}
// note: identical to one in Utf8StreamParser
@Override
public final int nextIntValue(int defaultValue) throws IOException
{
if (_currToken == JsonToken.FIELD_NAME) {
_nameCopied = false;
JsonToken t = _nextToken;
_nextToken = null;
_currToken = t;
if (t == JsonToken.VALUE_NUMBER_INT) {
return getIntValue();
}
if (t == JsonToken.START_ARRAY) {
_parsingContext = _parsingContext.createChildArrayContext(_tokenInputRow, _tokenInputCol);
} else if (t == JsonToken.START_OBJECT) {
_parsingContext = _parsingContext.createChildObjectContext(_tokenInputRow, _tokenInputCol);
}
return defaultValue;
}
// !!! TODO: optimize this case as well
return (nextToken() == JsonToken.VALUE_NUMBER_INT) ? getIntValue() : defaultValue;
}
// note: identical to one in Utf8StreamParser
@Override
public final long nextLongValue(long defaultValue) throws IOException
{
if (_currToken == JsonToken.FIELD_NAME) { // mostly copied from '_nextAfterName'
_nameCopied = false;
JsonToken t = _nextToken;
_nextToken = null;
_currToken = t;
if (t == JsonToken.VALUE_NUMBER_INT) {
return getLongValue();
}
if (t == JsonToken.START_ARRAY) {
_parsingContext = _parsingContext.createChildArrayContext(_tokenInputRow, _tokenInputCol);
} else if (t == JsonToken.START_OBJECT) {
_parsingContext = _parsingContext.createChildObjectContext(_tokenInputRow, _tokenInputCol);
}
return defaultValue;
}
// !!! TODO: optimize this case as well
return (nextToken() == JsonToken.VALUE_NUMBER_INT) ? getLongValue() : defaultValue;
}
// note: identical to one in UTF8StreamJsonParser
@Override
public final Boolean nextBooleanValue() throws IOException
{
if (_currToken == JsonToken.FIELD_NAME) { // mostly copied from '_nextAfterName'
_nameCopied = false;
JsonToken t = _nextToken;
_nextToken = null;
_currToken = t;
if (t == JsonToken.VALUE_TRUE) {
return Boolean.TRUE;
}
if (t == JsonToken.VALUE_FALSE) {
return Boolean.FALSE;
}
if (t == JsonToken.START_ARRAY) {
_parsingContext = _parsingContext.createChildArrayContext(_tokenInputRow, _tokenInputCol);
} else if (t == JsonToken.START_OBJECT) {
_parsingContext = _parsingContext.createChildObjectContext(_tokenInputRow, _tokenInputCol);
}
return null;
}
JsonToken t = nextToken();
if (t != null) {
int id = t.id();
if (id == ID_TRUE) return Boolean.TRUE;
if (id == ID_FALSE) return Boolean.FALSE;
}
return null;
}
/*
/**********************************************************
/* Internal methods, number parsing
/**********************************************************
*/
/*
* Initial parsing method for number values. It needs to be able
* to parse enough input to be able to determine whether the
* value is to be considered a simple integer value, or a more
* generic decimal value: latter of which needs to be expressed
* as a floating point number. The basic rule is that if the number
* has no fractional or exponential part, it is an integer; otherwise
* a floating point number.
*<p>
* Because much of input has to be processed in any case, no partial
* parsing is done: all input text will be stored for further
* processing. However, actual numeric value conversion will be
* deferred, since it is usually the most complicated and costliest
* part of processing.
*/
protected final JsonToken _parsePosNumber(int ch) throws IOException
{
/* Although we will always be complete with respect to textual
* representation (that is, all characters will be parsed),
* actual conversion to a number is deferred. Thus, need to
* note that no representations are valid yet
*/
int ptr = _inputPtr;
int startPtr = ptr-1; // to include digit already read
final int inputLen = _inputEnd;
// One special case, leading zero(es):
if (ch == INT_0) {
return _parseNumber2(false, startPtr);
}
/* First, let's see if the whole number is contained within
* the input buffer unsplit. This should be the common case;
* and to simplify processing, we will just reparse contents
* in the alternative case (number split on buffer boundary)
*/
int intLen = 1; // already got one
// First let's get the obligatory integer part:
int_loop:
while (true) {
if (ptr >= inputLen) {
_inputPtr = startPtr;
return _parseNumber2(false, startPtr);
}
ch = (int) _inputBuffer[ptr++];
if (ch < INT_0 || ch > INT_9) {
break int_loop;
}
++intLen;
}
if (ch == INT_PERIOD || ch == INT_e || ch == INT_E) {
_inputPtr = ptr;
return _parseFloat(ch, startPtr, ptr, false, intLen);
}
// Got it all: let's add to text buffer for parsing, access
--ptr; // need to push back following separator
_inputPtr = ptr;
// As per #105, need separating space between root values; check here
if (_parsingContext.inRoot()) {
_verifyRootSpace(ch);
}
int len = ptr-startPtr;
_textBuffer.resetWithShared(_inputBuffer, startPtr, len);
return resetInt(false, intLen);
}
private final JsonToken _parseFloat(int ch, int startPtr, int ptr, boolean neg, int intLen)
throws IOException
{
final int inputLen = _inputEnd;
int fractLen = 0;
// And then see if we get other parts
if (ch == '.') { // yes, fraction
fract_loop:
while (true) {
if (ptr >= inputLen) {
return _parseNumber2(neg, startPtr);
}
ch = (int) _inputBuffer[ptr++];
if (ch < INT_0 || ch > INT_9) {
break fract_loop;
}
++fractLen;
}
// must be followed by sequence of ints, one minimum
if (fractLen == 0) {
reportUnexpectedNumberChar(ch, "Decimal point not followed by a digit");
}
}
int expLen = 0;
if (ch == 'e' || ch == 'E') { // and/or exponent
if (ptr >= inputLen) {
_inputPtr = startPtr;
return _parseNumber2(neg, startPtr);
}
// Sign indicator?
ch = (int) _inputBuffer[ptr++];
if (ch == INT_MINUS || ch == INT_PLUS) { // yup, skip for now
if (ptr >= inputLen) {
_inputPtr = startPtr;
return _parseNumber2(neg, startPtr);
}
ch = (int) _inputBuffer[ptr++];
}
while (ch <= INT_9 && ch >= INT_0) {
++expLen;
if (ptr >= inputLen) {
_inputPtr = startPtr;
return _parseNumber2(neg, startPtr);
}
ch = (int) _inputBuffer[ptr++];
}
// must be followed by sequence of ints, one minimum
if (expLen == 0) {
reportUnexpectedNumberChar(ch, "Exponent indicator not followed by a digit");
}
}
--ptr; // need to push back following separator
_inputPtr = ptr;
// As per #105, need separating space between root values; check here
if (_parsingContext.inRoot()) {
_verifyRootSpace(ch);
}
int len = ptr-startPtr;
_textBuffer.resetWithShared(_inputBuffer, startPtr, len);
// And there we have it!
return resetFloat(neg, intLen, fractLen, expLen);
}
protected final JsonToken _parseNegNumber() throws IOException
{
int ptr = _inputPtr;
int startPtr = ptr-1; // to include sign/digit already read
final int inputLen = _inputEnd;
if (ptr >= inputLen) {
return _parseNumber2(true, startPtr);
}
int ch = _inputBuffer[ptr++];
// First check: must have a digit to follow minus sign
if (ch > INT_9 || ch < INT_0) {
_inputPtr = ptr;
return _handleInvalidNumberStart(ch, true);
}
// One special case, leading zero(es):
if (ch == INT_0) {
return _parseNumber2(true, startPtr);
}
int intLen = 1; // already got one
// First let's get the obligatory integer part:
int_loop:
while (true) {
if (ptr >= inputLen) {
return _parseNumber2(true, startPtr);
}
ch = (int) _inputBuffer[ptr++];
if (ch < INT_0 || ch > INT_9) {
break int_loop;
}
++intLen;
}
if (ch == INT_PERIOD || ch == INT_e || ch == INT_E) {
_inputPtr = ptr;
return _parseFloat(ch, startPtr, ptr, true, intLen);
}
--ptr;
_inputPtr = ptr;
if (_parsingContext.inRoot()) {
_verifyRootSpace(ch);
}
int len = ptr-startPtr;
_textBuffer.resetWithShared(_inputBuffer, startPtr, len);
return resetInt(true, intLen);
}
/*
* Method called to parse a number, when the primary parse
* method has failed to parse it, due to it being split on
* buffer boundary. As a result code is very similar, except
* that it has to explicitly copy contents to the text buffer
* instead of just sharing the main input buffer.
*/
private final JsonToken _parseNumber2(boolean neg, int startPtr) throws IOException
{
_inputPtr = neg ? (startPtr+1) : startPtr;
char[] outBuf = _textBuffer.emptyAndGetCurrentSegment();
int outPtr = 0;
// Need to prepend sign?
if (neg) {
outBuf[outPtr++] = '-';
}
// This is the place to do leading-zero check(s) too:
int intLen = 0;
char c = (_inputPtr < _inputEnd) ? _inputBuffer[_inputPtr++] : getNextChar("No digit following minus sign");
if (c == '0') {
c = _verifyNoLeadingZeroes();
}
boolean eof = false;
// Ok, first the obligatory integer part:
int_loop:
while (c >= '0' && c <= '9') {
++intLen;
if (outPtr >= outBuf.length) {
outBuf = _textBuffer.finishCurrentSegment();
outPtr = 0;
}
outBuf[outPtr++] = c;
if (_inputPtr >= _inputEnd && !loadMore()) {
// EOF is legal for main level int values
c = CHAR_NULL;
eof = true;
break int_loop;
}
c = _inputBuffer[_inputPtr++];
}
// Also, integer part is not optional
if (intLen == 0) {
reportInvalidNumber("Missing integer part (next char "+_getCharDesc(c)+")");
}
int fractLen = 0;
// And then see if we get other parts
if (c == '.') { // yes, fraction
outBuf[outPtr++] = c;
fract_loop:
while (true) {
if (_inputPtr >= _inputEnd && !loadMore()) {
eof = true;
break fract_loop;
}
c = _inputBuffer[_inputPtr++];
if (c < INT_0 || c > INT_9) {
break fract_loop;
}
++fractLen;
if (outPtr >= outBuf.length) {
outBuf = _textBuffer.finishCurrentSegment();
outPtr = 0;
}
outBuf[outPtr++] = c;
}
// must be followed by sequence of ints, one minimum
if (fractLen == 0) {
reportUnexpectedNumberChar(c, "Decimal point not followed by a digit");
}
}
int expLen = 0;
if (c == 'e' || c == 'E') { // exponent?
if (outPtr >= outBuf.length) {
outBuf = _textBuffer.finishCurrentSegment();
outPtr = 0;
}
outBuf[outPtr++] = c;
// Not optional, can require that we get one more char
c = (_inputPtr < _inputEnd) ? _inputBuffer[_inputPtr++]
: getNextChar("expected a digit for number exponent");
// Sign indicator?
if (c == '-' || c == '+') {
if (outPtr >= outBuf.length) {
outBuf = _textBuffer.finishCurrentSegment();
outPtr = 0;
}
outBuf[outPtr++] = c;
// Likewise, non optional:
c = (_inputPtr < _inputEnd) ? _inputBuffer[_inputPtr++]
: getNextChar("expected a digit for number exponent");
}
exp_loop:
while (c <= INT_9 && c >= INT_0) {
++expLen;
if (outPtr >= outBuf.length) {
outBuf = _textBuffer.finishCurrentSegment();
outPtr = 0;
}
outBuf[outPtr++] = c;
if (_inputPtr >= _inputEnd && !loadMore()) {
eof = true;
break exp_loop;
}
c = _inputBuffer[_inputPtr++];
}
// must be followed by sequence of ints, one minimum
if (expLen == 0) {
reportUnexpectedNumberChar(c, "Exponent indicator not followed by a digit");
}
}
// Ok; unless we hit end-of-input, need to push last char read back
if (!eof) {
--_inputPtr;
if (_parsingContext.inRoot()) {
_verifyRootSpace(c);
}
}
_textBuffer.setCurrentLength(outPtr);
// And there we have it!
return reset(neg, intLen, fractLen, expLen);
}
/*
* Method called when we have seen one zero, and want to ensure
* it is not followed by another
*/
private final char _verifyNoLeadingZeroes() throws IOException
{
// Fast case first:
if (_inputPtr < _inputEnd) {
char ch = _inputBuffer[_inputPtr];
// if not followed by a number (probably '.'); return zero as is, to be included
if (ch < '0' || ch > '9') {
return '0';
}
}
// and offline the less common case
return _verifyNLZ2();
}
private char _verifyNLZ2() throws IOException
{
if (_inputPtr >= _inputEnd && !loadMore()) {
return '0';
}
char ch = _inputBuffer[_inputPtr];
if (ch < '0' || ch > '9') {
return '0';
}
// ALLOW_NUMERIC_LEADING_ZEROS
// if so, just need to skip either all zeroes (if followed by number); or all but one (if non-number)
++_inputPtr; // Leading zero to be skipped
if (ch == INT_0) {
while (_inputPtr < _inputEnd || loadMore()) {
ch = _inputBuffer[_inputPtr];
if (ch < '0' || ch > '9') { // followed by non-number; retain one zero
return '0';
}
++_inputPtr; // skip previous zero
if (ch != '0') { // followed by other number; return
break;
}
}
}
return ch;
}
/*
* Method called if expected numeric value (due to leading sign) does not
* look like a number
*/
protected JsonToken _handleInvalidNumberStart(int ch, boolean negative) throws IOException
{
if (ch == 'I') {
if (_inputPtr >= _inputEnd) {
if (!loadMore()) { _reportInvalidEOFInValue(); }
}
ch = _inputBuffer[_inputPtr++];
if (ch == 'N') {
String match = negative ? "-INF" :"+INF";
_matchToken(match, 3);
_reportError("Non-standard token '"+match+"'");
} else if (ch == 'n') {
String match = negative ? "-Infinity" :"+Infinity";
_matchToken(match, 3);
_reportError("Non-standard token '"+match+"'");
}
}
reportUnexpectedNumberChar(ch, "expected digit (0-9) to follow minus sign, for valid numeric value");
return null;
}
/*
* Method called to ensure that a root-value is followed by a space
* token.
*<p>
* NOTE: caller MUST ensure there is at least one character available;
* and that input pointer is AT given char (not past)
*/
private final void _verifyRootSpace(int ch) throws IOException
{
// caller had pushed it back, before calling; reset
++_inputPtr;
switch (ch) {
case ' ':
case '\t':
return;
case '\r':
_skipCR();
return;
case '\n':
++_currInputRow;
_currInputRowStart = _inputPtr;
return;
}
_reportMissingRootWS(ch);
}
/*
/**********************************************************
/* Internal methods, secondary parsing
/**********************************************************
*/
protected final String _parseName() throws IOException
{
// First: let's try to see if we have a simple name: one that does
// not cross input buffer boundary, and does not contain escape sequences.
int ptr = _inputPtr;
final int[] codes = _icLatin1;
while (ptr < _inputEnd) {
int ch = _inputBuffer[ptr];
if (ch < codes.length && codes[ch] != 0) {
if (ch == '"') {
int start = _inputPtr;
_inputPtr = ptr+1; // to skip the quote
return this.findSymbol(_inputBuffer, start, ptr - start);
}
break;
}
++ptr;
}
int start = _inputPtr;
_inputPtr = ptr;
return _parseName2(start, INT_QUOTE);
}
private String _parseName2(int startPtr, int endChar) throws IOException
{
_textBuffer.resetWithShared(_inputBuffer, startPtr, (_inputPtr - startPtr));
/* Output pointers; calls will also ensure that the buffer is
* not shared and has room for at least one more char.
*/
char[] outBuf = _textBuffer.getCurrentSegment();
int outPtr = _textBuffer.getCurrentSegmentSize();
while (true) {
if (_inputPtr >= _inputEnd) {
if (!loadMore()) {
_reportInvalidEOF(": was expecting closing '"+((char) endChar)+"' for name");
}
}
char c = _inputBuffer[_inputPtr++];
int i = (int) c;
if (i <= INT_BACKSLASH) {
if (i == INT_BACKSLASH) {
/* Although chars outside of BMP are to be escaped as
* an UTF-16 surrogate pair, does that affect decoding?
* For now let's assume it does not.
*/
c = _decodeEscaped();
} else if (i <= endChar) {
if (i == endChar) {
break;
}
if (i < INT_SPACE) {
_throwUnquotedSpace(i, "name");
}
}
}
// Ok, let's add char to output:
outBuf[outPtr++] = c;
// Need more room?
if (outPtr >= outBuf.length) {
outBuf = _textBuffer.finishCurrentSegment();
outPtr = 0;
}
}
_textBuffer.setCurrentLength(outPtr);
{
TextBuffer tb = _textBuffer;
char[] buf = tb.getTextBuffer();
int start = tb.getTextOffset();
int len = tb.size();
return this.findSymbol(buf, start, len);
}
}
/*
* Method called when we see non-white space character other
* than double quote, when expecting a field name.
* In standard mode will just throw an expection; but
* in non-standard modes may be able to parse name.
*/
protected String _handleOddName(int i) throws IOException
{
// [JACKSON-173]: allow single quotes
if (i == '\'') {
return _parseAposName();
}
final int[] codes = CharTypes.getInputCodeLatin1JsNames();
final int maxCode = codes.length;
// Also: first char must be a valid name char, but NOT be number
boolean firstOk;
if (i < maxCode) { // identifier, or a number ([Issue#102])
firstOk = (codes[i] == 0);
} else {
firstOk = Character.isJavaIdentifierPart((char) i);
}
if (!firstOk) {
_reportUnexpectedChar(i, "was expecting either valid name character (for unquoted name) or double-quote (for quoted) to start field name");
}
int ptr = _inputPtr;
final int inputLen = _inputEnd;
if (ptr < inputLen) {
do {
int ch = _inputBuffer[ptr];
if (ch < maxCode) {
if (codes[ch] != 0) {
int start = _inputPtr-1; // -1 to bring back first char
_inputPtr = ptr;
return this.findSymbol(_inputBuffer, start, ptr - start);
}
} else if (!Character.isJavaIdentifierPart((char) ch)) {
int start = _inputPtr-1; // -1 to bring back first char
_inputPtr = ptr;
return this.findSymbol(_inputBuffer, start, ptr - start);
}
++ptr;
} while (ptr < inputLen);
}
int start = _inputPtr-1;
_inputPtr = ptr;
return _handleOddName2(start, codes);
}
protected String _parseAposName() throws IOException
{
// Note: mostly copy of_parseFieldName
int ptr = _inputPtr;
final int inputLen = _inputEnd;
if (ptr < inputLen) {
final int[] codes = _icLatin1;
final int maxCode = codes.length;
do {
int ch = _inputBuffer[ptr];
if (ch == '\'') {
int start = _inputPtr;
_inputPtr = ptr+1; // to skip the quote
return this.findSymbol(_inputBuffer, start, ptr - start);
}
if (ch < maxCode && codes[ch] != 0) {
break;
}
++ptr;
} while (ptr < inputLen);
}
int start = _inputPtr;
_inputPtr = ptr;
return _parseName2(start, '\'');
}
/*
* Method for handling cases where first non-space character
* of an expected value token is not legal for standard JSON content.
*/
protected JsonToken _handleOddValue(int i) throws IOException
{
// Most likely an error, unless we are to allow single-quote-strings
switch (i) {
case '\'':
/* [JACKSON-173]: allow single quotes. Unlike with regular
* Strings, we'll eagerly parse contents; this so that there's
* no need to store information on quote char used.
*
* Also, no separation to fast/slow parsing; we'll just do
* one regular (~= slowish) parsing, to keep code simple
*/
return _handleApos();
case 'N':
_matchToken("NaN", 1);
_reportError("Non-standard token 'NaN': enable JsonParser.Feature.ALLOW_NON_NUMERIC_NUMBERS to allow");
break;
case 'I':
_matchToken("Infinity", 1);
_reportError("Non-standard token 'Infinity': enable JsonParser.Feature.ALLOW_NON_NUMERIC_NUMBERS to allow");
break;
case '+': // note: '-' is taken as number
if (_inputPtr >= _inputEnd) {
if (!loadMore()) {
_reportInvalidEOFInValue();
}
}
return _handleInvalidNumberStart(_inputBuffer[_inputPtr++], false);
}
// [Issue#77] Try to decode most likely token
if (Character.isJavaIdentifierStart(i)) {
_reportInvalidToken(""+((char) i), "('true', 'false' or 'null')");
}
// but if it doesn't look like a token:
_reportUnexpectedChar(i, "expected a valid value (number, String, array, object, 'true', 'false' or 'null')");
return null;
}
protected JsonToken _handleApos() throws IOException
{
char[] outBuf = _textBuffer.emptyAndGetCurrentSegment();
int outPtr = _textBuffer.getCurrentSegmentSize();
while (true) {
if (_inputPtr >= _inputEnd) {
if (!loadMore()) {
_reportInvalidEOF(": was expecting closing quote for a string value");
}
}
char c = _inputBuffer[_inputPtr++];
int i = (int) c;
if (i <= '\\') {
if (i == '\\') {
/* Although chars outside of BMP are to be escaped as
* an UTF-16 surrogate pair, does that affect decoding?
* For now let's assume it does not.
*/
c = _decodeEscaped();
} else if (i <= '\'') {
if (i == '\'') {
break;
}
if (i < INT_SPACE) {
_throwUnquotedSpace(i, "string value");
}
}
}
// Need more room?
if (outPtr >= outBuf.length) {
outBuf = _textBuffer.finishCurrentSegment();
outPtr = 0;
}
// Ok, let's add char to output:
outBuf[outPtr++] = c;
}
_textBuffer.setCurrentLength(outPtr);
return JsonToken.VALUE_STRING;
}
private String _handleOddName2(int startPtr, int[] codes) throws IOException
{
_textBuffer.resetWithShared(_inputBuffer, startPtr, (_inputPtr - startPtr));
char[] outBuf = _textBuffer.getCurrentSegment();
int outPtr = _textBuffer.getCurrentSegmentSize();
final int maxCode = codes.length;
while (true) {
if (_inputPtr >= _inputEnd) {
if (!loadMore()) { // acceptable for now (will error out later)
break;
}
}
char c = _inputBuffer[_inputPtr];
int i = (int) c;
if (i <= maxCode) {
if (codes[i] != 0) {
break;
}
} else if (!Character.isJavaIdentifierPart(c)) {
break;
}
++_inputPtr;
// Ok, let's add char to output:
outBuf[outPtr++] = c;
// Need more room?
if (outPtr >= outBuf.length) {
outBuf = _textBuffer.finishCurrentSegment();
outPtr = 0;
}
}
_textBuffer.setCurrentLength(outPtr);
{
TextBuffer tb = _textBuffer;
char[] buf = tb.getTextBuffer();
int start = tb.getTextOffset();
int len = tb.size();
return this.findSymbol(buf, start, len);
}
}
public String findSymbol(char[] buffer, int start, int len)
{
if (len < 1) { // empty Strings are simplest to handle up front
return "";
}
return new String(buffer, start, len);
}
@Override
protected final void _finishString() throws IOException
{
/* First: let's try to see if we have simple String value: one
* that does not cross input buffer boundary, and does not
* contain escape sequences.
*/
int ptr = _inputPtr;
final int inputLen = _inputEnd;
if (ptr < inputLen) {
final int[] codes = _icLatin1;
final int maxCode = codes.length;
do {
int ch = _inputBuffer[ptr];
if (ch < maxCode && codes[ch] != 0) {
if (ch == '"') {
_textBuffer.resetWithShared(_inputBuffer, _inputPtr, (ptr-_inputPtr));
_inputPtr = ptr+1;
// Yes, we got it all
return;
}
break;
}
++ptr;
} while (ptr < inputLen);
}
/* Either ran out of input, or bumped into an escape
* sequence...
*/
_textBuffer.resetWithCopy(_inputBuffer, _inputPtr, (ptr-_inputPtr));
_inputPtr = ptr;
_finishString2();
}
protected void _finishString2() throws IOException
{
char[] outBuf = _textBuffer.getCurrentSegment();
int outPtr = _textBuffer.getCurrentSegmentSize();
final int[] codes = _icLatin1;
final int maxCode = codes.length;
while (true) {
if (_inputPtr >= _inputEnd) {
if (!loadMore()) {
_reportInvalidEOF(": was expecting closing quote for a string value");
}
}
char c = _inputBuffer[_inputPtr++];
int i = (int) c;
if (i < maxCode && codes[i] != 0) {
if (i == INT_QUOTE) {
break;
} else if (i == INT_BACKSLASH) {
/* Although chars outside of BMP are to be escaped as
* an UTF-16 surrogate pair, does that affect decoding?
* For now let's assume it does not.
*/
c = _decodeEscaped();
} else if (i < INT_SPACE) {
_throwUnquotedSpace(i, "string value");
} // anything else?
}
// Need more room?
if (outPtr >= outBuf.length) {
outBuf = _textBuffer.finishCurrentSegment();
outPtr = 0;
}
// Ok, let's add char to output:
outBuf[outPtr++] = c;
}
_textBuffer.setCurrentLength(outPtr);
}
/*
* Method called to skim through rest of unparsed String value,
* if it is not needed. This can be done bit faster if contents
* need not be stored for future access.
*/
protected final void _skipString() throws IOException
{
_tokenIncomplete = false;
int inPtr = _inputPtr;
int inLen = _inputEnd;
char[] inBuf = _inputBuffer;
while (true) {
if (inPtr >= inLen) {
_inputPtr = inPtr;
if (!loadMore()) {
_reportInvalidEOF(": was expecting closing quote for a string value");
}
inPtr = _inputPtr;
inLen = _inputEnd;
}
char c = inBuf[inPtr++];
int i = (int) c;
if (i <= INT_BACKSLASH) {
if (i == INT_BACKSLASH) {
/* Although chars outside of BMP are to be escaped as
* an UTF-16 surrogate pair, does that affect decoding?
* For now let's assume it does not.
*/
_inputPtr = inPtr;
c = _decodeEscaped();
inPtr = _inputPtr;
inLen = _inputEnd;
} else if (i <= INT_QUOTE) {
if (i == INT_QUOTE) {
_inputPtr = inPtr;
break;
}
if (i < INT_SPACE) {
_inputPtr = inPtr;
_throwUnquotedSpace(i, "string value");
}
}
}
}
}
/*
/**********************************************************
/* Internal methods, other parsing
/**********************************************************
*/
/*
* We actually need to check the character value here
* (to see if we have \n following \r).
*/
protected final void _skipCR() throws IOException {
if (_inputPtr < _inputEnd || loadMore()) {
if (_inputBuffer[_inputPtr] == '\n') {
++_inputPtr;
}
}
++_currInputRow;
_currInputRowStart = _inputPtr;
}
private final int _skipColon() throws IOException
{
if ((_inputPtr + 4) >= _inputEnd) {
return _skipColon2(false);
}
char c = _inputBuffer[_inputPtr];
if (c == ':') { // common case, no leading space
int i = _inputBuffer[++_inputPtr];
if (i > INT_SPACE) { // nor trailing
if (i == INT_SLASH || i == INT_HASH) {
return _skipColon2(true);
}
++_inputPtr;
return i;
}
if (i == INT_SPACE || i == INT_TAB) {
i = (int) _inputBuffer[++_inputPtr];
if (i > INT_SPACE) {
if (i == INT_SLASH || i == INT_HASH) {
return _skipColon2(true);
}
++_inputPtr;
return i;
}
}
return _skipColon2(true); // true -> skipped colon
}
if (c == ' ' || c == '\t') {
c = _inputBuffer[++_inputPtr];
}
if (c == ':') {
int i = _inputBuffer[++_inputPtr];
if (i > INT_SPACE) {
if (i == INT_SLASH || i == INT_HASH) {
return _skipColon2(true);
}
++_inputPtr;
return i;
}
if (i == INT_SPACE || i == INT_TAB) {
i = (int) _inputBuffer[++_inputPtr];
if (i > INT_SPACE) {
if (i == INT_SLASH || i == INT_HASH) {
return _skipColon2(true);
}
++_inputPtr;
return i;
}
}
return _skipColon2(true);
}
return _skipColon2(false);
}
private final int _skipColon2(boolean gotColon) throws IOException
{
while (true) {
if (_inputPtr >= _inputEnd) {
loadMoreGuaranteed();
}
int i = (int) _inputBuffer[_inputPtr++];
if (i > INT_SPACE) {
if (i == INT_SLASH) {
_skipComment();
continue;
}
if (i == INT_HASH) {
if (_skipYAMLComment()) {
continue;
}
}
if (gotColon) {
return i;
}
if (i != INT_COLON) {
if (i < INT_SPACE) {
_throwInvalidSpace(i);
}
_reportUnexpectedChar(i, "was expecting a colon to separate field name and value");
}
gotColon = true;
continue;
}
if (i < INT_SPACE) {
if (i == INT_LF) {
++_currInputRow;
_currInputRowStart = _inputPtr;
} else if (i == INT_CR) {
_skipCR();
} else if (i != INT_TAB) {
_throwInvalidSpace(i);
}
}
}
}
// Primary loop: no reloading, comment handling
private final int _skipComma(int i) throws IOException
{
if (i != INT_COMMA) {
_reportUnexpectedChar(i, "was expecting comma to separate "+_parsingContext.getTypeDesc()+" entries");
}
while (_inputPtr < _inputEnd) {
i = (int) _inputBuffer[_inputPtr++];
if (i > INT_SPACE) {
if (i == INT_SLASH || i == INT_HASH) {
--_inputPtr;
return _skipAfterComma2();
}
return i;
}
if (i < INT_SPACE) {
if (i == INT_LF) {
++_currInputRow;
_currInputRowStart = _inputPtr;
} else if (i == INT_CR) {
_skipCR();
} else if (i != INT_TAB) {
_throwInvalidSpace(i);
}
}
}
return _skipAfterComma2();
}
private final int _skipAfterComma2() throws IOException
{
while (_inputPtr < _inputEnd || loadMore()) {
int i = (int) _inputBuffer[_inputPtr++];
if (i > INT_SPACE) {
if (i == INT_SLASH) {
_skipComment();
continue;
}
if (i == INT_HASH) {
if (_skipYAMLComment()) {
continue;
}
}
return i;
}
if (i < INT_SPACE) {
if (i == INT_LF) {
++_currInputRow;
_currInputRowStart = _inputPtr;
} else if (i == INT_CR) {
_skipCR();
} else if (i != INT_TAB) {
_throwInvalidSpace(i);
}
}
}
throw _constructError("Unexpected end-of-input within/between "+_parsingContext.getTypeDesc()+" entries");
}
private final int _skipWSOrEnd() throws IOException
{
// Let's handle first character separately since it is likely that
// it is either non-whitespace; or we have longer run of white space
if (_inputPtr >= _inputEnd) {
if (!loadMore()) {
return _eofAsNextChar();
}
}
int i = _inputBuffer[_inputPtr++];
if (i > INT_SPACE) {
if (i == INT_SLASH || i == INT_HASH) {
--_inputPtr;
return _skipWSOrEnd2();
}
return i;
}
if (i != INT_SPACE) {
if (i == INT_LF) {
++_currInputRow;
_currInputRowStart = _inputPtr;
} else if (i == INT_CR) {
_skipCR();
} else if (i != INT_TAB) {
_throwInvalidSpace(i);
}
}
while (_inputPtr < _inputEnd) {
i = (int) _inputBuffer[_inputPtr++];
if (i > INT_SPACE) {
if (i == INT_SLASH || i == INT_HASH) {
--_inputPtr;
return _skipWSOrEnd2();
}
return i;
}
if (i != INT_SPACE) {
if (i == INT_LF) {
++_currInputRow;
_currInputRowStart = _inputPtr;
} else if (i == INT_CR) {
_skipCR();
} else if (i != INT_TAB) {
_throwInvalidSpace(i);
}
}
}
return _skipWSOrEnd2();
}
private int _skipWSOrEnd2() throws IOException
{
while (true) {
if (_inputPtr >= _inputEnd) {
if (!loadMore()) { // We ran out of input...
return _eofAsNextChar();
}
}
int i = (int) _inputBuffer[_inputPtr++];
if (i > INT_SPACE) {
if (i == INT_SLASH) {
_skipComment();
continue;
}
if (i == INT_HASH) {
if (_skipYAMLComment()) {
continue;
}
}
return i;
} else if (i != INT_SPACE) {
if (i == INT_LF) {
++_currInputRow;
_currInputRowStart = _inputPtr;
} else if (i == INT_CR) {
_skipCR();
} else if (i != INT_TAB) {
_throwInvalidSpace(i);
}
}
}
}
private void _skipComment() throws IOException
{
// First: check which comment (if either) it is:
if (_inputPtr >= _inputEnd && !loadMore()) {
_reportInvalidEOF(" in a comment");
}
char c = _inputBuffer[_inputPtr++];
if (c == '/') {
_skipLine();
} else if (c == '*') {
_skipCComment();
} else {
_reportUnexpectedChar(c, "was expecting either '*' or '/' for a comment");
}
}
private void _skipCComment() throws IOException
{
// Ok: need the matching '*/'
while ((_inputPtr < _inputEnd) || loadMore()) {
int i = (int) _inputBuffer[_inputPtr++];
if (i <= '*') {
if (i == '*') { // end?
if ((_inputPtr >= _inputEnd) && !loadMore()) {
break;
}
if (_inputBuffer[_inputPtr] == INT_SLASH) {
++_inputPtr;
return;
}
continue;
}
if (i < INT_SPACE) {
if (i == INT_LF) {
++_currInputRow;
_currInputRowStart = _inputPtr;
} else if (i == INT_CR) {
_skipCR();
} else if (i != INT_TAB) {
_throwInvalidSpace(i);
}
}
}
}
_reportInvalidEOF(" in a comment");
}
private boolean _skipYAMLComment() throws IOException
{
_skipLine();
return true;
}
private void _skipLine() throws IOException
{
// Ok: need to find EOF or linefeed
while ((_inputPtr < _inputEnd) || loadMore()) {
int i = (int) _inputBuffer[_inputPtr++];
if (i < INT_SPACE) {
if (i == INT_LF) {
++_currInputRow;
_currInputRowStart = _inputPtr;
break;
} else if (i == INT_CR) {
_skipCR();
break;
} else if (i != INT_TAB) {
_throwInvalidSpace(i);
}
}
}
}
@Override
protected char _decodeEscaped() throws IOException
{
if (_inputPtr >= _inputEnd) {
if (!loadMore()) {
_reportInvalidEOF(" in character escape sequence");
}
}
char c = _inputBuffer[_inputPtr++];
switch ((int) c) {
// First, ones that are mapped
case 'b':
return '\b';
case 't':
return '\t';
case 'n':
return '\n';
case 'f':
return '\f';
case 'r':
return '\r';
// And these are to be returned as they are
case '"':
case '/':
case '\\':
return c;
case 'u': // and finally hex-escaped
break;
default:
return _handleUnrecognizedCharacterEscape(c);
}
// Ok, a hex escape. Need 4 characters
int value = 0;
for (int i = 0; i < 4; ++i) {
if (_inputPtr >= _inputEnd) {
if (!loadMore()) {
_reportInvalidEOF(" in character escape sequence");
}
}
int ch = (int) _inputBuffer[_inputPtr++];
int digit = CharTypes.charToHex(ch);
if (digit < 0) {
_reportUnexpectedChar(ch, "expected a hex-digit for character escape sequence");
}
value = (value << 4) | digit;
}
return (char) value;
}
private final void _matchTrue() throws IOException {
int ptr = _inputPtr;
if ((ptr + 3) < _inputEnd) {
final char[] b = _inputBuffer;
if (b[ptr] == 'r' && b[++ptr] == 'u' && b[++ptr] == 'e') {
char c = b[++ptr];
if (c < '0' || c == ']' || c == '}') { // expected/allowed chars
_inputPtr = ptr;
return;
}
}
}
// buffer boundary, or problem, offline
_matchToken("true", 1);
}
private final void _matchFalse() throws IOException {
int ptr = _inputPtr;
if ((ptr + 4) < _inputEnd) {
final char[] b = _inputBuffer;
if (b[ptr] == 'a' && b[++ptr] == 'l' && b[++ptr] == 's' && b[++ptr] == 'e') {
char c = b[++ptr];
if (c < '0' || c == ']' || c == '}') { // expected/allowed chars
_inputPtr = ptr;
return;
}
}
}
// buffer boundary, or problem, offline
_matchToken("false", 1);
}
private final void _matchNull() throws IOException {
int ptr = _inputPtr;
if ((ptr + 3) < _inputEnd) {
final char[] b = _inputBuffer;
if (b[ptr] == 'u' && b[++ptr] == 'l' && b[++ptr] == 'l') {
char c = b[++ptr];
if (c < '0' || c == ']' || c == '}') { // expected/allowed chars
_inputPtr = ptr;
return;
}
}
}
// buffer boundary, or problem, offline
_matchToken("null", 1);
}
/*
* Helper method for checking whether input matches expected token
*/
protected final void _matchToken(String matchStr, int i) throws IOException
{
final int len = matchStr.length();
do {
if (_inputPtr >= _inputEnd) {
if (!loadMore()) {
_reportInvalidToken(matchStr.substring(0, i));
}
}
if (_inputBuffer[_inputPtr] != matchStr.charAt(i)) {
_reportInvalidToken(matchStr.substring(0, i));
}
++_inputPtr;
} while (++i < len);
// but let's also ensure we either get EOF, or non-alphanum char...
if (_inputPtr >= _inputEnd) {
if (!loadMore()) {
return;
}
}
char c = _inputBuffer[_inputPtr];
if (c < '0' || c == ']' || c == '}') { // expected/allowed chars
return;
}
// if Java letter, it's a problem tho
if (Character.isJavaIdentifierPart(c)) {
_reportInvalidToken(matchStr.substring(0, i));
}
return;
}
/*
/**********************************************************
/* Binary access
/**********************************************************
*/
/*
* Efficient handling for incremental parsing of base64-encoded
* textual content.
*/
protected byte[] _decodeBase64(Base64Variant b64variant) throws IOException
{
ByteArrayBuilder builder = _getByteArrayBuilder();
//main_loop:
while (true) {
// first, we'll skip preceding white space, if any
char ch;
do {
if (_inputPtr >= _inputEnd) {
loadMoreGuaranteed();
}
ch = _inputBuffer[_inputPtr++];
} while (ch <= INT_SPACE);
int bits = b64variant.decodeBase64Char(ch);
if (bits < 0) {
if (ch == '"') { // reached the end, fair and square?
return builder.toByteArray();
}
bits = _decodeBase64Escape(b64variant, ch, 0);
if (bits < 0) { // white space to skip
continue;
}
}
int decodedData = bits;
// then second base64 char; can't get padding yet, nor ws
if (_inputPtr >= _inputEnd) {
loadMoreGuaranteed();
}
ch = _inputBuffer[_inputPtr++];
bits = b64variant.decodeBase64Char(ch);
if (bits < 0) {
bits = _decodeBase64Escape(b64variant, ch, 1);
}
decodedData = (decodedData << 6) | bits;
// third base64 char; can be padding, but not ws
if (_inputPtr >= _inputEnd) {
loadMoreGuaranteed();
}
ch = _inputBuffer[_inputPtr++];
bits = b64variant.decodeBase64Char(ch);
// First branch: can get padding (-> 1 byte)
if (bits < 0) {
if (bits != Base64Variant.BASE64_VALUE_PADDING) {
// as per [JACKSON-631], could also just be 'missing' padding
if (ch == '"' && !b64variant.usesPadding()) {
decodedData >>= 4;
builder.append(decodedData);
return builder.toByteArray();
}
bits = _decodeBase64Escape(b64variant, ch, 2);
}
if (bits == Base64Variant.BASE64_VALUE_PADDING) {
// Ok, must get more padding chars, then
if (_inputPtr >= _inputEnd) {
loadMoreGuaranteed();
}
ch = _inputBuffer[_inputPtr++];
if (!b64variant.usesPaddingChar(ch)) {
throw reportInvalidBase64Char(b64variant, ch, 3, "expected padding character '"+b64variant.getPaddingChar()+"'");
}
// Got 12 bits, only need 8, need to shift
decodedData >>= 4;
builder.append(decodedData);
continue;
}
// otherwise we got escaped other char, to be processed below
}
// Nope, 2 or 3 bytes
decodedData = (decodedData << 6) | bits;
// fourth and last base64 char; can be padding, but not ws
if (_inputPtr >= _inputEnd) {
loadMoreGuaranteed();
}
ch = _inputBuffer[_inputPtr++];
bits = b64variant.decodeBase64Char(ch);
if (bits < 0) {
if (bits != Base64Variant.BASE64_VALUE_PADDING) {
// as per [JACKSON-631], could also just be 'missing' padding
if (ch == '"' && !b64variant.usesPadding()) {
decodedData >>= 2;
builder.appendTwoBytes(decodedData);
return builder.toByteArray();
}
bits = _decodeBase64Escape(b64variant, ch, 3);
}
if (bits == Base64Variant.BASE64_VALUE_PADDING) {
// With padding we only get 2 bytes; but we have
// to shift it a bit so it is identical to triplet
// case with partial output.
// 3 chars gives 3x6 == 18 bits, of which 2 are
// dummies, need to discard:
decodedData >>= 2;
builder.appendTwoBytes(decodedData);
continue;
}
// otherwise we got escaped other char, to be processed below
}
// otherwise, our triplet is now complete
decodedData = (decodedData << 6) | bits;
builder.appendThreeBytes(decodedData);
}
}
/*
/**********************************************************
/* Error reporting
/**********************************************************
*/
protected void _reportInvalidToken(String matchedPart) throws IOException {
_reportInvalidToken(matchedPart, "'null', 'true', 'false' or NaN");
}
protected void _reportInvalidToken(String matchedPart, String msg) throws IOException
{
StringBuilder sb = new StringBuilder(matchedPart);
/* Let's just try to find what appears to be the token, using
* regular Java identifier character rules. It's just a heuristic,
* nothing fancy here.
*/
while (true) {
if (_inputPtr >= _inputEnd) {
if (!loadMore()) {
break;
}
}
char c = _inputBuffer[_inputPtr];
if (!Character.isJavaIdentifierPart(c)) {
break;
}
++_inputPtr;
sb.append(c);
}
_reportError("Unrecognized token '"+sb.toString()+"': was expecting "+msg);
}
}