/**
 * Copyright (c) 2008-2013, 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 org.yaml.snakeyaml.error.Mark;

/**
 * Represents a scalar node.
 * <p>
 * Scalar nodes form the leaves in the node graph.
 * </p>
 */
public class ScalarNode extends Node {
	private Character style;
	private String value;

	public ScalarNode(final Tag tag, final String value, final Mark startMark, final Mark endMark, final Character style) {
		this(tag, true, value, startMark, endMark, style);
	}

	public ScalarNode(final Tag tag, final boolean resolved, final String value, final Mark startMark, final Mark endMark,
			final Character style) {
		super(tag, startMark, endMark);
		if (value == null) {
			throw new NullPointerException("value in a Node is required.");
		}
		this.value = value;
		this.style = style;
		this.resolved = resolved;
	}

	/**
	 * Get scalar style of this node.
	 * 
	 * @see org.yaml.snakeyaml.events.ScalarEvent
	 * @see <a href="http://yaml.org/spec/1.1/#id903915">Chapter 9. Scalar Styles</a>
	 */
	public Character getStyle() {
		return style;
	}

	@Override
	public NodeId getNodeId() {
		return NodeId.scalar;
	}

	/**
	 * Value of this scalar.
	 * 
	 * @return Scalar's value.
	 */
	public String getValue() {
		return value;
	}

	@Override
	public String toString() {
		return "<" + this.getClass().getName() + " (tag=" + getTag() + ", value=" + getValue() + ")>";
	}
}