/*******************************************************************************
 * Copyright (c) 2000, 2005 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
 *******************************************************************************/
package org.eclipse.search.ui;

import org.eclipse.jface.resource.ImageDescriptor;

/**
 * Implementors of this interface represent the result of a search. How the
 * results of a search are structured is up to the implementor of this
 * interface. The abstract base implementation provided with
 * {@link org.eclipse.search.ui.text.AbstractTextSearchResult AbstractTextSearchResult}
 * uses a flat list of matches to represent the result of a search. Subclasses
 * of <code>SearchResultEvent</code> can be used in order to notify listeners
 * of search result changes.
 * <p>
 * To present search results to the user implementors of this interface must
 * also provide an extension for the extension point
 * <code>org.eclipse.search.searchResultViewPage</code>.
 * </p>
 * <p>
 * Clients may implement this interface.
 * </p>
 * 
 * @see org.eclipse.search.ui.ISearchResultPage
 * @since 3.0
 */
public interface ISearchResult {
	/**
	 * Adds a <code>ISearchResultListener</code>. Has no effect when the
	 * listener has already been added.
	 * 
	 * @param l the listener to be added
	 */
	void addListener(ISearchResultListener l);
	/**
	 * Removes a <code>ISearchResultChangedListener</code>. Has no effect
	 * when the listener hasn't previously been added.
	 * 
	 * @param l the listener to be removed
	 */
	void removeListener(ISearchResultListener l);
	/**
	 * Returns a user readable label for this search result. The label is typically used in the result
	 * view and should contain the search query string and number of matches.
	 * 
	 * @return the label for this search result
	 */
	String getLabel();
	/**
	 * Returns a tooltip to be used when this search result is shown in the UI.
	 * 
	 * @return a user readable String
	 */
	String getTooltip();
	/**
	 * Returns an image descriptor for the given ISearchResult.
	 * 
	 * @return an image representing this search result or <code>null</code>
	 */
	ImageDescriptor getImageDescriptor();
	/**
	 * Returns the query that produced this search result.
	 * 
	 * @return the query producing this result
	 */
	ISearchQuery getQuery();
}