ltk/org.eclipse.statet.ltk.core/src/org/eclipse/statet/ltk/core/SourceContent.java

/*=============================================================================#
 # Copyright (c) 2007, 2020 Stephan Wahlbrink and others.
 # 
 # This program and the accompanying materials are made available under the
 # terms of the Eclipse Public License 2.0 which is available at
 # https://www.eclipse.org/legal/epl-2.0, or the Apache License, Version 2.0
 # which is available at https://www.apache.org/licenses/LICENSE-2.0.
 # 
 # SPDX-License-Identifier: EPL-2.0 OR Apache-2.0
 # 
 # Contributors:
 #     Stephan Wahlbrink <sw@wahlbrink.eu> - initial API and implementation
 #=============================================================================*/

package org.eclipse.statet.ltk.core;

import org.eclipse.statet.jcommons.lang.NonNullByDefault;
import org.eclipse.statet.jcommons.lang.Nullable;
import org.eclipse.statet.jcommons.text.core.BasicTextRegion;
import org.eclipse.statet.jcommons.text.core.TextLineInformation;
import org.eclipse.statet.jcommons.text.core.TextRegion;
import org.eclipse.statet.jcommons.text.core.util.TextLineInformationCreator;


/**
 * Source code with time stamp.
 */
@NonNullByDefault
public class SourceContent extends BasicTextRegion implements TextRegion {
	
	
	private static final TextLineInformationCreator LINES_CREATOR= new TextLineInformationCreator();
	
	
	private final long stamp;
	
	private final String text;
	
	private volatile @Nullable TextLineInformation lines;
	
	
	public SourceContent(final long stamp, final String text) {
		this(stamp, text, 0);
	}
	
	public SourceContent(final long stamp, final String text, final int startOffset) {
		super(startOffset, startOffset + text.length());
		this.stamp= stamp;
		this.text= text;
		this.lines= null;
	}
	
	public SourceContent(final long stamp, final String text,
			final int startOffset,
			final TextLineInformation lines) {
		super(startOffset, startOffset + text.length());
		this.stamp= stamp;
		this.text= text;
		this.lines= lines;
	}
	
	
	public final long getStamp() {
		return this.stamp;
	}
	
	public final String getText() {
		return this.text;
	}
	
//	/**
//	 * Returns offset of start of the {@link #getText() text} in complete source.
//	 * 
//	 * @return begin offset
//	 */
//	public final int getStartOffset()
	
//	/**
//	 * Returns offset of end of the {@link #getText() text} in complete source.
//	 * 
//	 * @return end offset (exclusive)
//	 */
//	public final int getEndOffset() {
	
	public final TextLineInformation getLines() {
		TextLineInformation lines= this.lines;
		if (lines == null) {
			synchronized (LINES_CREATOR) {
				lines= this.lines;
				if (lines == null) {
					lines= LINES_CREATOR.create(this.text);
				}
			}
		}
		return lines;
	}
	
	
	@Override
	public String toString() {
		return getText();
	}
	
}