/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright (c) 2010-2011 Oracle and/or its affiliates. All rights reserved.
*
* The contents of this file are subject to the terms of either the GNU
* General Public License Version 2 only ("GPL") or the Common Development
* and Distribution License("CDDL") (collectively, the "License"). You
* may not use this file except in compliance with the License. You can
* obtain a copy of the License at
* http://glassfish.java.net/public/CDDL+GPL_1_1.html
* or packager/legal/LICENSE.txt. See the License for the specific
* language governing permissions and limitations under the License.
*
* When distributing the software, include this License Header Notice in each
* file and include the License file at packager/legal/LICENSE.txt.
*
* GPL Classpath Exception:
* Oracle designates this particular file as subject to the "Classpath"
* exception as provided by Oracle in the GPL Version 2 section of the License
* file that accompanied this code.
*
* Modifications:
* If applicable, add the following below the License Header, with the fields
* enclosed by brackets [] replaced by your own identifying information:
* "Portions Copyright [year] [name of copyright owner]"
*
* Contributor(s):
* If you wish your version of this file to be governed by only the CDDL or
* only the GPL Version 2, indicate your decision by adding "[Contributor]
* elects to include this software in this distribution under the [CDDL or GPL
* Version 2] license." If you don't indicate a single choice of license, a
* recipient has the option to distribute your version of this file under
* either the CDDL, the GPL Version 2 or to extend the choice of license to
* its licensees as provided above. However, if you add GPL Version 2 code
* and therefore, elected the GPL Version 2 license, then the option applies
* only if the new code is made subject to such option by the copyright
* holder.
*/
package com.sun.jersey.json.impl;
import java.io.IOException;
import java.io.InputStream;
import org.codehaus.jackson.JsonEncoding;
import org.codehaus.jackson.JsonFactory;
import org.codehaus.jackson.JsonGenerator;
import org.codehaus.jackson.JsonParser;
import org.codehaus.jackson.JsonToken;
/**
*
* @author Jakub.Podlesak@Sun.COM
*/
public class JsonRootEatingInputStreamFilter extends FilteringInputStream {
private JsonParser jsonParser;
private JsonGenerator jsonGenerator;
private int depth;
private BufferingInputOutputStream buffers;
public JsonRootEatingInputStreamFilter(InputStream inputStream) throws IOException {
JsonFactory jsonFactory = new JsonFactory();
this.jsonParser = jsonFactory.createJsonParser(inputStream);
this.buffers = new BufferingInputOutputStream();
this.jsonGenerator = jsonFactory.createJsonGenerator(this.buffers, JsonEncoding.UTF8);
this.depth = 0;
}
protected byte[] nextBytes() throws IOException {
if (!jsonParser.hasCurrentToken()) {
jsonParser.nextToken();
}
final JsonToken token = jsonParser.getCurrentToken();
if ((depth == 0) && (token == JsonToken.START_OBJECT)) {
jsonParser.nextToken();
return nextBytes();
}
if ((depth == 0) && (token == JsonToken.FIELD_NAME)) {
depth++;
jsonParser.nextToken();
return nextBytes();
}
if ((depth == 1) && ((token == JsonToken.END_OBJECT) || (token == JsonToken.END_ARRAY))) {
jsonParser.nextToken();
return null;
}
jsonGenerator.copyCurrentEvent(jsonParser);
jsonGenerator.flush();
jsonParser.nextToken();
if ((token == JsonToken.START_ARRAY) || (token == JsonToken.START_OBJECT)) {
depth++;
} else if ((token == JsonToken.END_ARRAY) || (token == JsonToken.END_OBJECT)) {
depth--;
}
return buffers.nextBytes();
}
@Override
public int available() throws IOException {
return super.available()/* + buffers.available()*/;
}
}