/*******************************************************************************
 * Copyright (c) 2000, 2010 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *     Anton Leherbauer (Wind River Systems)
 *******************************************************************************/
package org.eclipse.cdt.internal.ui.search;

import org.eclipse.cdt.core.dom.ast.IASTNode;
import org.eclipse.cdt.core.dom.ast.IASTTranslationUnit;

public interface IOccurrencesFinder {
	
	public static final int K_OCCURRENCE= 5;
	
	public static final int F_WRITE_OCCURRENCE= 1;
	public static final int F_READ_OCCURRENCE= 2;

	/**
	 * Element representing an occurrence
	 */
	public static class OccurrenceLocation {
		private final int fOffset;
		private final int fLength;
		private final int fFlags;
		private final String fDescription;

		public OccurrenceLocation(int offset, int length, int flags, String description) {
			fOffset= offset;
			fLength= length;
			fFlags= flags;
			fDescription= description;
		}

		public int getOffset() {
			return fOffset;
		}

		public int getLength() {
			return fLength;
		}

		public int getFlags() {
			return fFlags;
		}

		public String getDescription() {
			return fDescription;
		}

		@Override
		public String toString() {
			return "[" + fOffset + " / " + fLength + "] " + fDescription; //$NON-NLS-1$//$NON-NLS-2$ //$NON-NLS-3$
		}
	}
	
	public String initialize(IASTTranslationUnit root, IASTNode node);

	/**
	 * Returns the plural label for this finder with 3 placeholders:
	 * <ul>
	 * <li>{0} for the {@link #getElementName() element name}</li>
	 * <li>{1} for the number of results found</li>
	 * <li>{2} for the scope (name of the compilation unit)</li>
	 *  </ul>
	 * @return the unformatted label
	 */
	public String getUnformattedPluralLabel();
	
	/**
	 * Returns the singular label for this finder with 2 placeholders:
	 * <ul>
	 * <li>{0} for the {@link #getElementName() element name}</li>
	 * <li>{1} for the scope (name of the compilation unit)</li>
	 *  </ul>
	 * @return the unformatted label
	 */
	public String getUnformattedSingularLabel();
	
	/**
	 * Returns the name of the element to look for or <code>null</code> if the finder hasn't
	 * been initialized yet.
	 * @return the name of the element
	 */
	public String getElementName();

	/**
	 * Returns the AST root.
	 * 
	 * @return the AST root
	 */
	public IASTTranslationUnit getASTRoot();

	/**
	 * Returns the occurrences
	 * 
	 * @return the occurrences
	 */
	public OccurrenceLocation[] getOccurrences();

	public int getSearchKind();
			
	/**
	 * Returns the id of this finder.
	 * @return returns the id of this finder.
	 */
	public String getID();
}