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With inspiration from other libraries
/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright (c) 2012-2013 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
* https://glassfish.dev.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 org.glassfish.json;
import org.glassfish.json.api.BufferPool;
import javax.json.*;
import java.io.StringWriter;
import java.math.BigDecimal;
import java.math.BigInteger;
import java.util.AbstractList;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
/**
* JsonArrayBuilder impl
*
* @author Jitendra Kotamraju
*/
class JsonArrayBuilderImpl implements JsonArrayBuilder {
private ArrayList valueList;
private final BufferPool bufferPool;
JsonArrayBuilderImpl(BufferPool bufferPool) {
this.bufferPool = bufferPool;
}
public JsonArrayBuilder add(JsonValue value) {
validateValue(value);
addValueList(value);
return this;
}
public JsonArrayBuilder add(String value) {
validateValue(value);
addValueList(new JsonStringImpl(value));
return this;
}
public JsonArrayBuilder add(BigDecimal value) {
validateValue(value);
addValueList(JsonNumberImpl.getJsonNumber(value));
return this;
}
public JsonArrayBuilder add(BigInteger value) {
validateValue(value);
addValueList(JsonNumberImpl.getJsonNumber(value));
return this;
}
public JsonArrayBuilder add(int value) {
addValueList(JsonNumberImpl.getJsonNumber(value));
return this;
}
public JsonArrayBuilder add(long value) {
addValueList(JsonNumberImpl.getJsonNumber(value));
return this;
}
public JsonArrayBuilder add(double value) {
addValueList(JsonNumberImpl.getJsonNumber(value));
return this;
}
public JsonArrayBuilder add(boolean value) {
addValueList(value ? JsonValue.TRUE : JsonValue.FALSE);
return this;
}
public JsonArrayBuilder addNull() {
addValueList(JsonValue.NULL);
return this;
}
public JsonArrayBuilder add(JsonObjectBuilder builder) {
if (builder == null) {
throw new NullPointerException(JsonMessages.ARRBUILDER_OBJECT_BUILDER_NULL());
}
addValueList(builder.build());
return this;
}
public JsonArrayBuilder add(JsonArrayBuilder builder) {
if (builder == null) {
throw new NullPointerException(JsonMessages.ARRBUILDER_ARRAY_BUILDER_NULL());
}
addValueList(builder.build());
return this;
}
public JsonArray build() {
List snapshot;
if (valueList == null) {
snapshot = Collections.emptyList();
} else {
// Should we trim to minimize storage ?
// valueList.trimToSize();
snapshot = Collections.unmodifiableList(valueList);
}
valueList = null;
return new JsonArrayImpl(snapshot, bufferPool);
}
private void addValueList(JsonValue value) {
if (valueList == null) {
valueList = new ArrayList();
}
valueList.add(value);
}
private void validateValue(Object value) {
if (value == null) {
throw new NullPointerException(JsonMessages.ARRBUILDER_VALUE_NULL());
}
}
private static final class JsonArrayImpl extends AbstractList implements JsonArray {
private final List valueList; // Unmodifiable
private final BufferPool bufferPool;
JsonArrayImpl(List valueList, BufferPool bufferPool) {
this.valueList = valueList;
this.bufferPool = bufferPool;
}
@Override
public int size() {
return valueList.size();
}
@Override
public JsonObject getJsonObject(int index) {
return (JsonObject)valueList.get(index);
}
@Override
public JsonArray getJsonArray(int index) {
return (JsonArray)valueList.get(index);
}
@Override
public JsonNumber getJsonNumber(int index) {
return (JsonNumber)valueList.get(index);
}
@Override
public JsonString getJsonString(int index) {
return (JsonString)valueList.get(index);
}
@Override
@SuppressWarnings("unchecked")
public List getValuesAs(Class clazz) {
return (List)valueList;
}
@Override
public String getString(int index) {
return getJsonString(index).getString();
}
@Override
public String getString(int index, String defaultValue) {
try {
return getString(index);
} catch (Exception e) {
return defaultValue;
}
}
@Override
public int getInt(int index) {
return getJsonNumber(index).intValue();
}
@Override
public int getInt(int index, int defaultValue) {
try {
return getInt(index);
} catch (Exception e) {
return defaultValue;
}
}
@Override
public boolean getBoolean(int index) {
JsonValue jsonValue = get(index);
if (jsonValue == JsonValue.TRUE) {
return true;
} else if (jsonValue == JsonValue.FALSE) {
return false;
} else {
throw new ClassCastException();
}
}
@Override
public boolean getBoolean(int index, boolean defaultValue) {
try {
return getBoolean(index);
} catch (Exception e) {
return defaultValue;
}
}
@Override
public boolean isNull(int index) {
return valueList.get(index).equals(JsonValue.NULL);
}
@Override
public ValueType getValueType() {
return ValueType.ARRAY;
}
@Override
public JsonValue get(int index) {
return valueList.get(index);
}
@Override
public String toString() {
StringWriter sw = new StringWriter();
JsonWriter jw = new JsonWriterImpl(sw, bufferPool);
jw.write(this);
jw.close();
return sw.toString();
}
}
}