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/**
 * Copyright (c) 2008, SnakeYAML
 *
 * 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.DumperOptions;
import org.yaml.snakeyaml.error.Mark;

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

    public ScalarNode(Tag tag, String value, Mark startMark, Mark endMark, DumperOptions.ScalarStyle style) {
        this(tag, true, value, startMark, endMark, style);
    }

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

    /*
     * Existed in older versions but replaced with {@link DumperOptions.ScalarStyle}-based constructor.
     * Restored in v1.22 for backwards compatibility.
     * @deprecated Since restored in v1.22.  Use {@link ScalarNode#ScalarNode(Tag, String, Mark, Mark, org.yaml.snakeyaml.DumperOptions.ScalarStyle) }.
     */
    @Deprecated
    public ScalarNode(Tag tag, String value, Mark startMark, Mark endMark, Character style) {
        this(tag, value, startMark, endMark, DumperOptions.ScalarStyle.createStyle(style));
    }

    /*
     * Existed in older versions but replaced with {@link DumperOptions.ScalarStyle}-based constructor.
     * Restored in v1.22 for backwards compatibility.
     * @deprecated Since restored in v1.22.  Use {@link ScalarNode#ScalarNode(Tag, boolean, String, Mark, Mark, org.yaml.snakeyaml.DumperOptions.ScalarStyle) }.
     */
    @Deprecated
    public ScalarNode(Tag tag, boolean resolved, String value, Mark startMark, Mark endMark,
              Character style) {
        this(tag, resolved, value, startMark, endMark, DumperOptions.ScalarStyle.createStyle(style));
    }
    
    /**
     * Get scalar style of this node.
     *
     * @see org.yaml.snakeyaml.events.ScalarEvent
     * @see Chapter 9. Scalar
     *      Styles
     * @return style of this scalar node
     * @deprecated use getScalarStyle instead
     */
    @Deprecated
    public  Character getStyle() {
        return style.getChar();
    }

    /**
     * Get scalar style of this node.
     *
     * @see org.yaml.snakeyaml.events.ScalarEvent
     * @see Chapter 9. Scalar
     *      Styles
     * @return style of this scalar node
     */
    public DumperOptions.ScalarStyle getScalarStyle() {
        return style;
    }

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

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

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

    public boolean isPlain() {
        return  style == DumperOptions.ScalarStyle.PLAIN;
    }
}