/*

  * 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.Collections;

 import java.util.LinkedHashMap;

 import java.util.Map;

 import javax.json.JsonArrayBuilder;

 import javax.json.JsonObject;

 import javax.json.JsonObjectBuilder;

 import javax.json.JsonValue;

 class JsonObjectBuilderImpl implements JsonObjectBuilder, Serializable {

     private Map<String, JsonValue> tmpMap;

     @Override

     public JsonObjectBuilder add(final String name, final JsonValue value) {

         putValue(name, value);

         return this;

     }

     @Override

     public JsonObjectBuilder add(final String name, final String value) {

         putValue(name, new JsonStringImpl(value));

         return this;

     }

     @Override

     public JsonObjectBuilder add(final String name, final BigInteger value) {

         putValue(name, new JsonNumberImpl(new BigDecimal(value)));

         return this;

     }

     @Override

     public JsonObjectBuilder add(final String name, final BigDecimal value) {

         putValue(name, new JsonNumberImpl(value));

         return this;

     }

     @Override

     public JsonObjectBuilder add(final String name, final int value) {

         putValue(name, new JsonLongImpl(value));

         return this;

     }

     @Override

     public JsonObjectBuilder add(final String name, final long value) {

         putValue(name, new JsonLongImpl(value));

         return this;

     }

     @Override

     public JsonObjectBuilder add(final String name, final double value) {

         putValue(name, new JsonDoubleImpl(value));

         return this;

     }

     @Override

     public JsonObjectBuilder add(final String name, final boolean value) {

         putValue(name, value ? JsonValue.TRUE : JsonValue.FALSE);

         return this;

     }

     @Override

     public JsonObjectBuilder addNull(final String name) {

         putValue(name, JsonValue.NULL);

         return this;

     }

     @Override

     public JsonObjectBuilder add(final String name, final JsonObjectBuilder builder) {

         putValue(name, builder.build());

         return this;

     }

     @Override

     public JsonObjectBuilder add(final String name, final JsonArrayBuilder builder) {

         putValue(name, builder.build());

         return this;

     }

     private void putValue(String name, JsonValue value){

         if(name == null || value == null) {

             throw npe();

         }

         if(tmpMap==null){

             tmpMap=new LinkedHashMap<String, JsonValue>();

         }

         tmpMap.put(name, value);

     }

     private static NullPointerException npe() {

         return new NullPointerException("name or value/builder must not be null");

     }

     @Override

     public JsonObject build() {

         if(tmpMap==null) {

             return new JsonObjectImpl(Collections.EMPTY_MAP);

         } else {

             Map<String, JsonValue> dump = (Collections.unmodifiableMap(tmpMap));

             tmpMap=null;

             return new JsonObjectImpl(dump);

         }

     }

 }