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The official Couchbase JVM Core IO Library
/*
* Copyright (c) 2015 Couchbase, Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALING
* IN THE SOFTWARE.
*/
package com.couchbase.client.core.endpoint.util;
import com.couchbase.client.deps.io.netty.buffer.ByteBufProcessor;
/**
* A {@link com.couchbase.client.deps.io.netty.buffer.ByteBufProcessor} to find the closing position of a JSON string.
* Applying this to a buffer will output the position of the closing of the string, relative to that buffer's
* readerIndex, or -1 if the end of the section couldn't be found.
*
* It'll take into account the string's opening quote (which is expected to be after the current readerIndex),
* and ignore escaped quotes inside the string.
*
* It is invoked on a {@link com.couchbase.client.deps.io.netty.buffer.ByteBuf} by calling
* {@link com.couchbase.client.deps.io.netty.buffer.ByteBuf#forEachByte(com.couchbase.client.deps.io.netty.buffer.ByteBufProcessor)} methods.
* *
* @author Simon Baslé
* @since 1.1
*/
public class StringClosingPositionBufProcessor implements ByteBufProcessor {
private boolean inString = false;
private byte lastByte = 0;
@Override
public boolean process(byte value) throws Exception {
boolean done;
if (!inString && value == '"') {
inString = true;
done = false;
} else if (inString && value == '"' && lastByte != '\\') {
inString = false;
done = true;
} else {
done = false;
}
lastByte = value;
return !done;
}
}