/*

  * 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.

  */

 package org.apache.johnzon.core;

 import java.io.Serializable;

 import java.math.BigDecimal;

 import java.math.BigInteger;

 import java.util.ArrayList;

 import java.util.Collections;

 import java.util.List;

 import javax.json.JsonArray;

 import javax.json.JsonArrayBuilder;

 import javax.json.JsonObjectBuilder;

 import javax.json.JsonValue;

 class JsonArrayBuilderImpl implements JsonArrayBuilder, Serializable {

     private List<JsonValue> tmpList;

     @Override

     public JsonArrayBuilder add(final JsonValue value) {

         addValue(value);

         return this;

     }

     @Override

     public JsonArrayBuilder add(final String value) {

         addValue(new JsonStringImpl(value));

         return this;

     }

     @Override

     public JsonArrayBuilder add(final BigDecimal value) {

         addValue(new JsonNumberImpl(value));

         return this;

     }

     @Override

     public JsonArrayBuilder add(final BigInteger value) {

         addValue(new JsonNumberImpl(new BigDecimal(value)));

         return this;

     }

     @Override

     public JsonArrayBuilder add(final int value) {

         addValue(new JsonLongImpl(value));

         return this;

     }

     @Override

     public JsonArrayBuilder add(final long value) {

         addValue(new JsonLongImpl(value));

         return this;

     }

     @Override

     public JsonArrayBuilder add(final double value) {

         addValue(new JsonDoubleImpl(value));

         return this;

     }

     @Override

     public JsonArrayBuilder add(final boolean value) {

         addValue(value ? JsonValue.TRUE : JsonValue.FALSE);

         return this;

     }

     @Override

     public JsonArrayBuilder addNull() {

         addValue(JsonValue.NULL);

         return this;

     }

     @Override

     public JsonArrayBuilder add(final JsonObjectBuilder builder) {

         addValue(builder.build());

         return this;

     }

     @Override

     public JsonArrayBuilder add(final JsonArrayBuilder builder) {

         addValue(builder.build());

         return this;

     }

     private void addValue(JsonValue value){

         if (value == null) {

             throw npe();

         }

         if(tmpList==null){

             tmpList=new ArrayList<JsonValue>();

         }

         tmpList.add(value);

     }

     @Override

     public JsonArray build() {

         if(tmpList == null) {

             return new JsonArrayImpl(Collections.EMPTY_LIST);

         } else {

             List<JsonValue> dump = (Collections.unmodifiableList(tmpList));

             tmpList=null;

             return new JsonArrayImpl(dump);

         }

     }

     private static NullPointerException npe() {

         throw new NullPointerException("value/builder must not be null");

     }

 }