/**
* Copyright 2011-2013 Akiban Technologies, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/* The original from which this derives bore the following: */
/*
Derby - Class org.apache.derby.impl.sql.compile.NumericConstantNode
Licensed to the Apache Software Foundation (ASF) under one or more
contributor license agreements. See the NOTICE file distributed with
this work for additional information regarding copyright ownership.
The ASF licenses this file to you under the Apache License, Version 2.0
(the "License"); you may not use this file except in compliance with
the License. You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package com.akiban.sql.parser;
import com.akiban.sql.StandardException;
import com.akiban.sql.types.TypeId;
import java.math.BigDecimal;
import java.sql.Types;
public final class NumericConstantNode extends ConstantNode
{
/**
* Initializer for a typed null node
*
* @param arg1 The TypeId for the type of node OR An object containing the value of the constant.
*
* @exception StandardException
*/
public void init(Object arg1) throws StandardException {
int precision = 0, scal = 0, maxwidth = 0;
Boolean isNullable;
boolean valueInP; // value in Predicate-- if TRUE a value was passed in
TypeId typeId = null;
int typeid = 0;
if (arg1 instanceof TypeId) {
typeId = (TypeId)arg1;
isNullable = Boolean.TRUE;
valueInP = false;
maxwidth = 0;
}
else {
isNullable = Boolean.FALSE;
valueInP = true;
}
switch (getNodeType()) {
case NodeTypes.TINYINT_CONSTANT_NODE:
precision = TypeId.SMALLINT_PRECISION;
scal = TypeId.SMALLINT_SCALE;
if (valueInP) {
maxwidth = TypeId.SMALLINT_MAXWIDTH;
typeid = Types.TINYINT;
setValue((Byte)arg1);
}
break;
case NodeTypes.INT_CONSTANT_NODE:
precision = TypeId.INT_PRECISION;
scal = TypeId.INT_SCALE;
if (valueInP) {
maxwidth = TypeId.INT_MAXWIDTH;
typeid = Types.INTEGER;
setValue((Integer)arg1);
}
break;
case NodeTypes.SMALLINT_CONSTANT_NODE:
precision = TypeId.SMALLINT_PRECISION;
scal = TypeId.SMALLINT_SCALE;
if (valueInP) {
maxwidth = TypeId.SMALLINT_MAXWIDTH;
typeid = Types.SMALLINT;
setValue((Short)arg1);
}
break;
case NodeTypes.LONGINT_CONSTANT_NODE:
precision = TypeId.LONGINT_PRECISION;
scal = TypeId.LONGINT_SCALE;
if (valueInP) {
maxwidth = TypeId.LONGINT_MAXWIDTH;
typeid = Types.BIGINT;
setValue((Long)arg1);
}
break;
case NodeTypes.DECIMAL_CONSTANT_NODE:
if (valueInP) {
typeid = Types.DECIMAL;
String image = (String)arg1;
int length = image.length();
int idx = image.indexOf('.');
precision = length;
if (!Character.isDigit(image.charAt(0)) && (idx != 0))
precision--; // Has a sign.
if (idx < 0)
scal = 0;
else {
precision--;
scal = length - idx - 1;
}
maxwidth = length;
setValue(new BigDecimal(image));
}
else {
precision = TypeId.DEFAULT_DECIMAL_PRECISION;
scal = TypeId.DEFAULT_DECIMAL_SCALE;
maxwidth = TypeId.DECIMAL_MAXWIDTH;
}
break;
case NodeTypes.DOUBLE_CONSTANT_NODE:
precision = TypeId.DOUBLE_PRECISION;
scal = TypeId.DOUBLE_SCALE;
if (valueInP) {
maxwidth = TypeId.DOUBLE_MAXWIDTH;
typeid = Types.DOUBLE;
setValue((Double)arg1);
}
break;
case NodeTypes.FLOAT_CONSTANT_NODE:
precision = TypeId.REAL_PRECISION;
scal = TypeId.REAL_SCALE;
if (valueInP) {
maxwidth = TypeId.REAL_MAXWIDTH;
typeid = Types.REAL;
setValue((Float)arg1);
}
break;
default:
assert false : "Unexpected nodeType = " + getNodeType();
break;
}
setType((typeId != null) ? typeId : TypeId.getBuiltInTypeId(typeid),
precision,
scal,
isNullable.booleanValue(),
maxwidth);
}
/**
* Return an Object representing the bind time value of this
* expression tree. If the expression tree does not evaluate to
* a constant at bind time then we return null.
* This is useful for bind time resolution of VTIs.
* RESOLVE: What do we do for primitives?
*
* @return An Object representing the bind time value of this expression tree.
* (null if not a bind time constant.)
*
* @exception StandardException Thrown on error
*/
Object getConstantValueAsObject() throws StandardException {
return value;
}
}