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package org.drools.lang;

import java.util.Collections;
import java.util.LinkedList;

/**
 * Class that represents a DroolsLanguage sentence. To be used by IDE.
 * 
 * @author porcelli
 */
@SuppressWarnings("unchecked")
public class DroolsSentence {

	/**
	 * sentence type
	 */
	private DroolsSentenceType type = DroolsSentenceType.RULE;
	/**
	 * linked list that stores DroolsTokens and Locations
	 */
	private LinkedList content = new LinkedList();
	/**
	 * start char offset
	 */
	private int startOffset = -1;
	/**
	 * end char offset
	 */
	private int endOffset = -1;

	/**
	 * getter of sentence type
	 * 
	 * @return sentence type
	 * @see DroolsSentenceType
	 */
	public DroolsSentenceType getType() {
		return type;
	}

	/**
	 * setter of sentence type
	 * 
	 * @param type
	 *            sentence type
	 * @see DroolsSentenceType
	 */
	public void setType(DroolsSentenceType type) {
		this.type = type;
	}

	/**
	 * getter for start char offset
	 * 
	 * @return start char offset
	 */
	public int getStartOffset() {
		return startOffset;
	}

	/**
	 * setter for start char offset
	 * 
	 * @param startOffset
	 *            start char offset
	 */
	public void setStartOffset(int startOffset) {
		this.startOffset = startOffset;
	}

	/**
	 * getter for end char offset
	 * 
	 * @return end char offset
	 */
	public int getEndOffset() {
		return endOffset;
	}

	/**
	 * setter for end char offset
	 * 
	 * @param endOffset
	 *            end char offset
	 */
	public void setEndOffset(int endOffset) {
		this.endOffset = endOffset;
	}

	/**
	 * getter of sentence content
	 * 
	 * @return linked list that stores DroolsTokens and Locations
	 */
	public LinkedList getContent() {
		return content;
	}

	/**
	 * Reverses the content linked list
	 */
	public void reverseContent() {
		Collections.reverse(content);
	}

	/**
	 * Add a token to the content and sets char offset info
	 * 
	 * @param token
	 *            token to be stored
	 */
	public void addContent(DroolsToken token) {
		if (startOffset == -1) {
			startOffset = token.getStartIndex();
		}
		endOffset = token.getStopIndex();
		this.content.add(token);
	}

	/**
	 * Add a location to the content
	 * 
	 * @param contextInfo
	 *            location identifier
	 * @see Location
	 */
	public void addContent(int contextInfo) {
		this.content.add(contextInfo);
	}
}