Check if a text is present at the current position in a buffer for string
import java.io.File;
import java.io.FileFilter;
import java.io.UnsupportedEncodingException;
import java.util.ArrayList;
import java.util.List;
import java.util.regex.Pattern;
import java.util.regex.PatternSyntaxException;
/*
* 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.
*
*/
/**
* Various string manipulation methods that are more efficient then chaining
* string operations: all is done in the same buffer without creating a bunch of
* string objects.
*
* @author <a href="mailto:dev@labs.apache.org">Dungeon Project</a>
*/
public class Main {
/**
* Check if a text is present at the current position in a buffer.
*
* @param byteArray
* The buffer which contains the data
* @param index
* Current position in the buffer
* @param text
* The text we want to check
* @return <code>true</code> if the buffer contains the text.
*/
public static final int areEquals( byte[] byteArray, int index, String text )
{
if ( ( byteArray == null ) || ( byteArray.length == 0 ) || ( byteArray.length <= index ) || ( index < 0 )
|| ( text == null ) )
{
return -1;
}
else
{
try
{
byte[] data = text.getBytes( "UTF-8" );
return areEquals( byteArray, index, data );
}
catch ( UnsupportedEncodingException uee )
{
return -1;
}
}
}
/**
* Check if a text is present at the current position in a buffer.
*
* @param byteArray
* The buffer which contains the data
* @param index
* Current position in the buffer
* @param byteArray2
* The text we want to check
* @return <code>true</code> if the buffer contains the text.
*/
public static final int areEquals( byte[] byteArray, int index, byte[] byteArray2 )
{
if ( ( byteArray == null ) || ( byteArray.length == 0 ) || ( byteArray.length <= index ) || ( index < 0 )
|| ( byteArray2 == null ) || ( byteArray2.length == 0 )
|| ( byteArray2.length > ( byteArray.length + index ) ) )
{
return -1;
}
else
{
for ( int i = 0; i < byteArray2.length; i++ )
{
if ( byteArray[index++] != byteArray2[i] )
{
return -1;
}
}
return index;
}
}
}
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