com.sun.jersey.json.impl.writer.JacksonArrayWrapperGenerator Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of ehcache Show documentation
Show all versions of ehcache Show documentation
Ehcache is an open source, standards-based cache used to boost performance,
offload the database and simplify scalability. Ehcache is robust, proven and full-featured and
this has made it the most widely-used Java-based cache.
/*
* 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.writer;
import java.io.IOException;
import java.math.BigDecimal;
import java.math.BigInteger;
import org.codehaus.jackson.Base64Variant;
import org.codehaus.jackson.JsonGenerationException;
import org.codehaus.jackson.JsonGenerator;
import org.codehaus.jackson.JsonNode;
import org.codehaus.jackson.JsonParser;
import org.codehaus.jackson.JsonProcessingException;
import org.codehaus.jackson.JsonStreamContext;
import org.codehaus.jackson.JsonToken;
import org.codehaus.jackson.ObjectCodec;
/**
*
* @author japod
*/
public class JacksonArrayWrapperGenerator extends JsonGenerator {
private enum State { START, AFTER_NULL, IN_THE_MIDDLE };
State state = State.START;
int depth = 0;
final JsonGenerator generator;
private boolean isClosed = false;
final int arrayDepth;
private JacksonArrayWrapperGenerator() {
this(null, 0);
}
private JacksonArrayWrapperGenerator(JsonGenerator generator) {
this(generator, 0);
}
private JacksonArrayWrapperGenerator(final JsonGenerator generator, final int arrayDepth) {
this.generator = generator;
this.arrayDepth = arrayDepth;
}
public static JsonGenerator createArrayWrapperGenerator(JsonGenerator g) {
return new JacksonArrayWrapperGenerator(g);
}
public static JsonGenerator createArrayWrapperGenerator(final JsonGenerator g, final int arrayDepth) {
return new JacksonArrayWrapperGenerator(g, arrayDepth);
}
private void aboutToWriteANonNull() throws IOException {
if (depth == arrayDepth) {
if (state == State.START) {
generator.writeStartArray();
state = State.IN_THE_MIDDLE;
} else if (state == State.AFTER_NULL) {
generator.writeStartArray();
generator.writeNull();
state = State.IN_THE_MIDDLE;
}
}
}
@Override @Deprecated
public void enableFeature(Feature feature) {
generator.enableFeature(feature);
}
@Override
public JsonGenerator enable(Feature feature) {
return generator.enable(feature);
}
@Override @Deprecated
public void disableFeature(Feature feature) {
generator.disableFeature(feature);
}
@Override
public JsonGenerator disable(Feature feature) {
return generator.disable(feature);
}
@Override
public void setFeature(Feature feature, boolean enabled) {
generator.setFeature(feature, enabled);
}
@Override @Deprecated
public boolean isFeatureEnabled(Feature feature) {
return generator.isFeatureEnabled(feature);
}
@Override
public boolean isEnabled(Feature f) {
return generator.isEnabled(f);
}
@Override
public JsonGenerator useDefaultPrettyPrinter() {
return generator.useDefaultPrettyPrinter();
}
@Override
public JsonGenerator setCodec(ObjectCodec codec) {
return generator.setCodec(codec);
}
@Override
public ObjectCodec getCodec() {
return generator.getCodec();
}
@Override
public void writeRawValue(String rawString) throws IOException, JsonGenerationException {
aboutToWriteANonNull();
generator.writeRawValue(rawString);
}
@Override
public void writeRawValue(String rawString, int startIndex, int length) throws IOException, JsonGenerationException {
aboutToWriteANonNull();
generator.writeRawValue(rawString, startIndex, length);
}
@Override
public void writeRawValue(char[] rawChars, int startIndex, int length) throws IOException, JsonGenerationException {
aboutToWriteANonNull();
generator.writeRaw(rawChars, startIndex, length);
}
@Override
public void writeNumber(BigInteger number) throws IOException, JsonGenerationException {
aboutToWriteANonNull();
generator.writeNumber(number);
}
@Override
public void writeObject(Object o) throws IOException, JsonProcessingException {
aboutToWriteANonNull();
generator.writeObject(o);
}
@Override
public void writeTree(JsonNode node) throws IOException, JsonProcessingException {
aboutToWriteANonNull();
generator.writeTree(node);
}
@Override
public boolean isClosed() {
return isClosed;
}
@Override
public JsonStreamContext getOutputContext() {
return generator.getOutputContext();
}
@Override
public void writeStartArray() throws IOException, JsonGenerationException {
aboutToWriteANonNull();
generator.writeStartArray();
}
@Override
public void writeEndArray() throws IOException, JsonGenerationException {
generator.writeEndArray();
}
@Override
public void writeStartObject() throws IOException, JsonGenerationException {
if (arrayDepth > 0 && depth == arrayDepth) {
generator.writeStartArray();
generator.writeStartObject();
} else {
aboutToWriteANonNull();
generator.writeStartObject();
}
depth++;
}
@Override
public void writeEndObject() throws IOException, JsonGenerationException {
if (arrayDepth > 0 && depth == arrayDepth) {
generator.writeEndObject();
generator.writeEndArray();
} else {
generator.writeEndObject();
}
depth--;
}
@Override
public void writeFieldName(String name) throws IOException, JsonGenerationException {
generator.writeFieldName(name);
}
@Override
public void writeString(String s) throws IOException, JsonGenerationException {
aboutToWriteANonNull();
generator.writeString(s);
}
@Override
public void writeString(char[] text, int start, int length) throws IOException, JsonGenerationException {
aboutToWriteANonNull();
generator.writeString(text, start, length);
}
@Override
public void writeRawUTF8String(byte[] bytes, int start, int length) throws IOException, JsonGenerationException {
aboutToWriteANonNull();
generator.writeRawUTF8String(bytes, start, length);
}
@Override
public void writeUTF8String(byte[] bytes, int start, int length) throws IOException, JsonGenerationException {
aboutToWriteANonNull();
generator.writeUTF8String(bytes, start, length);
}
@Override
public void writeRaw(String raw) throws IOException, JsonGenerationException {
aboutToWriteANonNull();
generator.writeRaw(raw);
}
@Override
public void writeRaw(String raw, int start, int length) throws IOException, JsonGenerationException {
aboutToWriteANonNull();
generator.writeRaw(raw, start, length);
}
@Override
public void writeRaw(char[] raw, int start, int count) throws IOException, JsonGenerationException {
aboutToWriteANonNull();
generator.writeRaw(raw, start, count);
}
@Override
public void writeRaw(char c) throws IOException, JsonGenerationException {
aboutToWriteANonNull();
generator.writeRaw(c);
}
@Override
public void writeBinary(Base64Variant variant, byte[] bytes, int start, int count) throws IOException, JsonGenerationException {
aboutToWriteANonNull();
generator.writeBinary(variant, bytes, start, count);
}
@Override
public void writeNumber(int i) throws IOException, JsonGenerationException {
aboutToWriteANonNull();
generator.writeNumber(i);
}
@Override
public void writeNumber(long l) throws IOException, JsonGenerationException {
aboutToWriteANonNull();
generator.writeNumber(l);
}
@Override
public void writeNumber(double d) throws IOException, JsonGenerationException {
aboutToWriteANonNull();
generator.writeNumber(d);
}
@Override
public void writeNumber(float f) throws IOException, JsonGenerationException {
aboutToWriteANonNull();
generator.writeNumber(f);
}
@Override
public void writeNumber(BigDecimal bd) throws IOException, JsonGenerationException {
aboutToWriteANonNull();
generator.writeNumber(bd);
}
@Override
public void writeNumber(String number) throws IOException, JsonGenerationException, UnsupportedOperationException {
aboutToWriteANonNull();
generator.writeNumber(number);
}
@Override
public void writeBoolean(boolean b) throws IOException, JsonGenerationException {
aboutToWriteANonNull();
generator.writeBoolean(b);
}
@Override
public void writeNull() throws IOException, JsonGenerationException {
switch (state) {
case START :
state = State.AFTER_NULL;
break;
case AFTER_NULL :
generator.writeStartArray();
generator.writeNull();
state = State.IN_THE_MIDDLE;
default:
generator.writeNull();
}
}
@Override
public void copyCurrentEvent(JsonParser parser) throws IOException, JsonProcessingException {
if (JsonToken.VALUE_NULL != parser.getCurrentToken()) {
aboutToWriteANonNull();
generator.copyCurrentEvent(parser);
} else {
writeNull();
}
}
@Override
public void copyCurrentStructure(JsonParser parser) throws IOException, JsonProcessingException {
generator.copyCurrentStructure(parser);
}
@Override
public void flush() throws IOException {
if (depth == arrayDepth) {
switch (state) {
case IN_THE_MIDDLE:
generator.writeEndArray();
break;
case AFTER_NULL:
case START:
generator.writeStartArray();
generator.writeEndArray();
break;
}
}
generator.flush();
}
@Override
public void close() throws IOException {
flush();
generator.close();
isClosed = true;
}
}