| /* |
| * 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 javax.json.JsonArray; |
| import javax.json.JsonNumber; |
| import javax.json.JsonObject; |
| import javax.json.JsonString; |
| import javax.json.JsonValue; |
| import javax.json.stream.JsonGenerator; |
| import java.io.ObjectStreamException; |
| import java.io.Serializable; |
| import java.io.StringWriter; |
| import java.util.AbstractMap; |
| import java.util.LinkedHashMap; |
| import java.util.Map; |
| import java.util.Set; |
| |
| final class JsonObjectImpl extends AbstractMap<String, JsonValue> implements JsonObject, Serializable { |
| private final BufferStrategy.BufferProvider<char[]> provider; |
| |
| private transient Integer hashCode = null; |
| private final Map<String, JsonValue> unmodifieableBackingMap; |
| |
| private <T> T value(final String name, final Class<T> clazz) { |
| final JsonValue v = unmodifieableBackingMap.get(name); |
| if (v != null) { |
| return clazz.cast(v); |
| } |
| return null; |
| } |
| |
| private <T> T valueOrExcpetion(final String name, final Class<T> clazz) { |
| T value = value(name, clazz); |
| if (value == null) { |
| throw new NullPointerException("no mapping for " + name); |
| } |
| |
| return value; |
| } |
| |
| JsonObjectImpl(final Map<String, JsonValue> backingMap, final BufferStrategy.BufferProvider<char[]> provider) { |
| this.unmodifieableBackingMap = new LinkedHashMap<>(backingMap); |
| this.provider = provider; |
| } |
| |
| @Override |
| public JsonArray getJsonArray(final String name) { |
| return value(name, JsonArray.class); |
| } |
| |
| @Override |
| public JsonObject getJsonObject(final String name) { |
| return value(name, JsonObject.class); |
| } |
| |
| @Override |
| public JsonNumber getJsonNumber(final String name) { |
| return value(name, JsonNumber.class); |
| } |
| |
| @Override |
| public JsonString getJsonString(final String name) { |
| return value(name, JsonString.class); |
| } |
| |
| @Override |
| public String getString(final String name) { |
| return valueOrExcpetion(name, JsonString.class).getString(); |
| } |
| |
| @Override |
| public String getString(final String name, final String defaultValue) { |
| final Object v = value(name, JsonValue.class); |
| if (v != null && v instanceof JsonString) { |
| return JsonString.class.cast(v).getString(); |
| } |
| |
| return defaultValue; |
| } |
| |
| @Override |
| public int getInt(final String name) { |
| return valueOrExcpetion(name, JsonNumber.class).intValue(); |
| } |
| |
| @Override |
| public int getInt(final String name, final int defaultValue) { |
| final Object v = value(name, JsonValue.class); |
| if (v != null && v instanceof JsonNumber) { |
| return JsonNumber.class.cast(v).intValue(); |
| } |
| |
| return defaultValue; |
| } |
| |
| @Override |
| public boolean getBoolean(final String name) { |
| final JsonValue obj = valueOrExcpetion(name, JsonValue.class); |
| if (JsonValue.TRUE == obj) { |
| return true; |
| } |
| if (JsonValue.FALSE == obj) { |
| return false; |
| } |
| throw new ClassCastException("Wrong value for a boolean: " + obj); |
| } |
| |
| @Override |
| public boolean getBoolean(final String name, final boolean defaultValue) { |
| final Object v = value(name, JsonValue.class); |
| if (v != null) { |
| return JsonValue.TRUE == v || JsonValue.FALSE != v && defaultValue; |
| } |
| return defaultValue; |
| } |
| |
| @Override |
| public boolean isNull(final String name) { |
| return JsonValue.NULL == valueOrExcpetion(name, JsonValue.class); |
| } |
| |
| @Override |
| public ValueType getValueType() { |
| return ValueType.OBJECT; |
| } |
| |
| @Override |
| public String toString() { |
| if (unmodifieableBackingMap.isEmpty()) { |
| return "{}"; |
| } |
| final StringWriter writer = new StringWriter(2048); |
| try (final JsonGenerator generator = new JsonGeneratorImpl(writer, provider, false)) { |
| generator.writeStartObject(); |
| unmodifieableBackingMap.forEach(generator::write); |
| generator.writeEnd(); |
| } |
| return writer.toString(); |
| } |
| |
| @Override |
| public boolean equals(final Object obj) { |
| return (JsonObjectImpl.class.isInstance(obj) |
| && unmodifieableBackingMap.equals(JsonObjectImpl.class.cast(obj).unmodifieableBackingMap)) |
| || (Map.class.isInstance(obj) && unmodifieableBackingMap.equals(Map.class.cast(obj))); |
| } |
| |
| @Override |
| public int hashCode() { |
| Integer h = hashCode; |
| if (h == null) { |
| h = unmodifieableBackingMap.hashCode(); |
| hashCode = h; |
| } |
| return h; |
| } |
| |
| @Override |
| public Set<java.util.Map.Entry<String, JsonValue>> entrySet() { |
| return unmodifieableBackingMap.entrySet(); |
| } |
| |
| @Override |
| public void clear() { |
| throw new UnsupportedOperationException(); |
| } |
| |
| @Override |
| public JsonValue remove(final Object key) { |
| throw new UnsupportedOperationException(); |
| } |
| |
| private Object writeReplace() throws ObjectStreamException { |
| return new SerializableValue(toString()); |
| } |
| } |