org.jsonman.node.MapNode.java Source code

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Here is the source code for org.jsonman.node.MapNode.java

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/*
 * Copyright 2013 Takao Nakaguchi.
 *
 * Licensed 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.jsonman.node;

import java.util.Iterator;
import java.util.LinkedHashMap;
import java.util.Map;

import org.apache.commons.lang3.tuple.Pair;
import org.jsonman.Node;
import org.jsonman.NodeFactory;
import org.jsonman.NodeVisitor;

public class MapNode extends AbstractNode {
    public MapNode() {
        this.map = new LinkedHashMap<String, Object>();
    }

    public MapNode(Map<String, Object> map) {
        this.map = map;
    }

    @Override
    public MapNode clone() {
        return new MapNode(new LinkedHashMap<String, Object>(map));
    }

    @Override
    public boolean isMap() {
        return true;
    }

    @Override
    public Map<String, Object> getValue() {
        return map;
    }

    @Override
    @SuppressWarnings("unchecked")
    public void setValue(Object value) {
        setValue((Map<String, Object>) value);
    }

    public void setValue(Map<String, Object> map) {
        this.map = map;
    }

    public Node getChild(String name) {
        Object value = map.get(name);
        if (value == null)
            return null;
        return NodeFactory.create(value);
    }

    public Object getChildValue(String name) {
        return map.get(name);
    }

    @SuppressWarnings("unchecked")
    public <T extends Node> T getChildAs(String name, Class<T> clazz) {
        Object value = map.get(name);
        if (value == null)
            return null;
        return (T) NodeFactory.create(value);
    }

    public void setChild(String name, Node value) {
        map.put(name, value.getValue());
    }

    @Override
    public Iterable<Node> getChildren() {
        return new Iterable<Node>() {
            @Override
            public Iterator<Node> iterator() {
                return new Iterator<Node>() {
                    @Override
                    public boolean hasNext() {
                        return entries.hasNext();
                    }

                    @Override
                    public Node next() {
                        Map.Entry<String, Object> n = entries.next();
                        return NodeFactory.create(n.getValue());
                    }

                    @Override
                    public void remove() {
                        throw new UnsupportedOperationException();
                    }

                    private Iterator<Map.Entry<String, Object>> entries = map.entrySet().iterator();
                };
            }
        };
    }

    public Iterable<Pair<String, Node>> getChildrenWithName() {
        return new Iterable<Pair<String, Node>>() {
            @Override
            public Iterator<Pair<String, Node>> iterator() {
                return new Iterator<Pair<String, Node>>() {
                    @Override
                    public boolean hasNext() {
                        return entries.hasNext();
                    }

                    @Override
                    public Pair<String, Node> next() {
                        Map.Entry<String, Object> e = entries.next();
                        return Pair.of(e.getKey(), NodeFactory.create(e.getValue()));
                    }

                    @Override
                    public void remove() {
                        entries.remove();
                    }

                    private Iterator<Map.Entry<String, Object>> entries = map.entrySet().iterator();
                };
            }
        };
    }

    @Override
    public void accept(NodeVisitor visitor) {
        visitor.visit(this);
    }

    public Node addChild(String name, Object value) {
        map.put(name, value);
        return NodeFactory.create(value);
    }

    @Override
    public Node createEmpty() {
        return new MapNode(new LinkedHashMap<String, Object>());
    }

    public void appendChild(String name, Node child) {
        map.put(name, child.getValue());
    }

    public void mergeValue(MapNode target) {
        Map<String, Object> tvalue = target.getValue();
        for (Map.Entry<String, Object> entry : tvalue.entrySet()) {
            map.put(entry.getKey(), entry.getValue());
        }
    }

    private Map<String, Object> map;
}