Copyright (c) 2008, http://www.snakeyaml.org
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.
/**
 * Copyright (c) 2008, http://www.snakeyaml.org
 *
 * 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.yaml.snakeyaml.nodes;

import java.util.List;

import org.yaml.snakeyaml.DumperOptions;
import org.yaml.snakeyaml.error.Mark;

Represents a map.

A map is a collection of unsorted key-value pairs.

/**
 * Represents a map.
 * <p>
 * A map is a collection of unsorted key-value pairs.
 * </p>
 */
public class MappingNode extends CollectionNode<NodeTuple> {
    private List<NodeTuple> value;
    private boolean merged = false;

    public MappingNode(Tag tag, boolean resolved, List<NodeTuple> value, Mark startMark,
            Mark endMark, DumperOptions.FlowStyle flowStyle) {
        super(tag, startMark, endMark, flowStyle);
        if (value == null) {
            throw new NullPointerException("value in a Node is required.");
        }
        this.value = value;
        this.resolved = resolved;
    }

    public MappingNode(Tag tag, List<NodeTuple> value, DumperOptions.FlowStyle flowStyle) {
        this(tag, true, value, null, null, flowStyle);
    }

    /*
     * Existed in older versions but replaced with {@link DumperOptions.FlowStyle}-based constructor.
     * Restored in v1.22 for backwards compatibility.
     * @deprecated Since restored in v1.22.  Use {@link MappingNode#MappingNode(Tag, boolean, List, Mark, Mark, org.yaml.snakeyaml.DumperOptions.FlowStyle) }.
     */
    @Deprecated
    public MappingNode(Tag tag, boolean resolved, List<NodeTuple> value, Mark startMark,
            Mark endMark, Boolean flowStyle) {
        this(tag, resolved, value, startMark, endMark, DumperOptions.FlowStyle.fromBoolean(flowStyle));
    }
    
    /*
     * Existed in older versions but replaced with {@link DumperOptions.FlowStyle}-based constructor.
     * Restored in v1.22 for backwards compatibility.
     * @deprecated Since restored in v1.22.  Use {@link MappingNode#MappingNode(Tag, List, org.yaml.snakeyaml.DumperOptions.FlowStyle) }.
     */
    @Deprecated
    public MappingNode(Tag tag, List<NodeTuple> value, Boolean flowStyle) {
        this(tag, value, DumperOptions.FlowStyle.fromBoolean(flowStyle));
        
    }
    
    @Override
    public NodeId getNodeId() {
        return NodeId.mapping;
    }

    
Returns the entries of this map.
Returns:
List of entries./**
     * Returns the entries of this map.
     * 
     * @return List of entries.
     */
    public List<NodeTuple> getValue() {
        return value;
    }

    public void setValue(List<NodeTuple> mergedValue) {
        value = mergedValue;
    }

    public void setOnlyKeyType(Class<? extends Object> keyType) {
        for (NodeTuple nodes : value) {
            nodes.getKeyNode().setType(keyType);
        }
    }

    public void setTypes(Class<? extends Object> keyType, Class<? extends Object> valueType) {
        for (NodeTuple nodes : value) {
            nodes.getValueNode().setType(valueType);
            nodes.getKeyNode().setType(keyType);
        }
    }

    @Override
    public String toString() {
        String values;
        StringBuilder buf = new StringBuilder();
        for (NodeTuple node : getValue()) {
            buf.append("{ key=");
            buf.append(node.getKeyNode());
            buf.append("; value=");
            if (node.getValueNode() instanceof CollectionNode) {
                // to avoid overflow in case of recursive structures
                buf.append(System.identityHashCode(node.getValueNode()));
            } else {
                buf.append(node.toString());
            }
            buf.append(" }");
        }
        values = buf.toString();
        return "<" + this.getClass().getName() + " (tag=" + getTag() + ", values=" + values + ")>";
    }

    
Params:
merged – 
           - true if map contains merge node/**
     * @param merged
     *            - true if map contains merge node
     */
    public void setMerged(boolean merged) {
        this.merged = merged;
    }

    
Returns:
true if map contains merge node/**
     * @return true if map contains merge node
     */
    public boolean isMerged() {
        return merged;
    }
}