/*
* Copyright 2014 the original author or authors.
*
* 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.
*/
package org.grails.charsequences;
/**
* Wraps a single char and implements CharSequence interface
*
*
* @author Lari Hotari
* @since 2.3.10
*
*/
class SingleCharCharSequence implements CharSequence, CharArrayAccessible {
private final char ch;
SingleCharCharSequence(int c) {
this((char)c);
}
SingleCharCharSequence(char ch) {
this.ch = ch;
}
public char charAt(int index) {
if ((index < 0) || (index > 0))
throw new StringIndexOutOfBoundsException(index);
return ch;
}
public int length() {
return 1;
}
public CharSequence subSequence(int start, int end) {
if (start < 0)
throw new StringIndexOutOfBoundsException(start);
if (end > 1)
throw new StringIndexOutOfBoundsException(end);
if (start > end)
throw new StringIndexOutOfBoundsException(end - start);
return this;
}
@Override
public String toString() {
return new String(new char[]{ch});
}
public void getChars(int srcBegin, int srcEnd, char[] dst, int dstBegin) {
if (srcBegin < 0)
throw new StringIndexOutOfBoundsException(srcBegin);
if ((srcEnd < 0) || (srcEnd > 1))
throw new StringIndexOutOfBoundsException(srcEnd);
if (srcBegin > srcEnd)
throw new StringIndexOutOfBoundsException("srcBegin > srcEnd");
dst[dstBegin] = ch;
}
}