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OpenSearchServer is a powerful, enterprise-class, search engine program. Using the web user interface, the crawlers (web, file, database, ...) and the REST/RESTFul API you will be able to integrate quickly and easily advanced full-text search capabilities in your application. OpenSearchServer runs on Windows and Linux/Unix/BSD.

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/**   
 * License Agreement for OpenSearchServer
 *
 * Copyright (C) 2008-2012 Emmanuel Keller / Jaeksoft
 * 
 * http://www.open-search-server.com
 * 
 * This file is part of OpenSearchServer.
 *
 * OpenSearchServer is free software: you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *
 * OpenSearchServer is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with OpenSearchServer. 
 *  If not, see .
 **/

package com.jaeksoft.searchlib.web.controller.delete;

import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.net.URISyntaxException;
import java.net.URLEncoder;

import org.zkoss.bind.annotation.AfterCompose;
import org.zkoss.bind.annotation.Command;
import org.zkoss.bind.annotation.NotifyChange;
import org.zkoss.zul.Messagebox;

import com.jaeksoft.searchlib.Client;
import com.jaeksoft.searchlib.SearchLibException;
import com.jaeksoft.searchlib.function.expression.SyntaxError;
import com.jaeksoft.searchlib.query.ParseException;
import com.jaeksoft.searchlib.request.AbstractSearchRequest;
import com.jaeksoft.searchlib.request.SearchPatternRequest;
import com.jaeksoft.searchlib.result.AbstractResultSearch;
import com.jaeksoft.searchlib.util.StringUtils;
import com.jaeksoft.searchlib.web.AbstractServlet;
import com.jaeksoft.searchlib.web.controller.AlertController;
import com.jaeksoft.searchlib.web.controller.CommonController;
import com.jaeksoft.searchlib.web.controller.PushEvent;

@AfterCompose(superclass = true)
public class DeleteController extends CommonController {

	private class DeleteAlert extends AlertController {

		protected DeleteAlert(int num) throws InterruptedException {
			super(
					"Please, confirm that you want to delete the documents matching this query: "
							+ request.getQueryString() + ". " + num
							+ " document(s) will be erased", Messagebox.YES
							| Messagebox.NO, Messagebox.QUESTION);
		}

		@Override
		protected void onYes() throws SearchLibException {
			request.reset();
			Client client = getClient();
			if (client == null)
				return;
			client.deleteDocuments(request);
			PushEvent.eventDocumentUpdate.publish(client);
		}
	}

	private transient AbstractSearchRequest request;

	private transient boolean isChecked;

	public DeleteController() throws SearchLibException {
		super();
	}

	@Override
	protected void reset() throws SearchLibException {
		request = null;
		isChecked = false;
		Client client = getClient();
		if (client != null)
			request = new SearchPatternRequest(getClient());
	}

	public AbstractSearchRequest getRequest() {
		return request;
	}

	@Command
	@NotifyChange("*")
	public void onCheck() throws IOException, ParseException, SyntaxError,
			URISyntaxException, ClassNotFoundException, SearchLibException,
			InterruptedException, InstantiationException,
			IllegalAccessException {
		request.reset();
		int numFound = ((AbstractResultSearch) getClient().request(request))
				.getNumFound();
		isChecked = true;
		new AlertController(numFound + " document(s) found.",
				Messagebox.INFORMATION);
	}

	@Command
	public void onDelete() throws IOException, ParseException, SyntaxError,
			URISyntaxException, ClassNotFoundException, SearchLibException,
			InterruptedException, InstantiationException,
			IllegalAccessException {
		if (!isChecked)
			return;
		request.reset();
		int numFound = ((AbstractResultSearch) getClient().request(request))
				.getNumFound();
		new DeleteAlert(numFound);
	}

	@Command
	@NotifyChange("*")
	public void onQueryChange() throws SearchLibException {
		isChecked = false;
	}

	public boolean isNotChecked() {
		return !isChecked;
	}

	public String getRequestApiCall() throws SearchLibException,
			UnsupportedEncodingException {
		Client client = getClient();
		if (client == null)
			return null;
		StringBuilder sb = AbstractServlet.getApiUrl(getBaseUrl(), "/delete",
				client, getLoggedUser());
		String q = request.getQueryString();
		if (q == null)
			q = StringUtils.EMPTY;
		else
			q = q.replaceAll("\n", " ");
		sb.append("&q=");
		sb.append(URLEncoder.encode(q, "UTF-8"));
		return sb.toString();
	}

}