org.exist.xquery.XQueryUseCase.java Source code

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Here is the source code for org.exist.xquery.XQueryUseCase.java

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/*
 *  eXist Open Source Native XML Database
 *  Copyright (C) 2001-06 Wolfgang M. Meier
 *  wolfgang@exist-db.org
 *  http://exist.sourceforge.net
 *  
 *  This program is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU Lesser General Public License
 *  as published by the Free Software Foundation; either version 2
 *  of the License, or (at your option) any later version.
 *  
 *  This program 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 Lesser General Public License for more details.
 *  
 *  You should have received a copy of the GNU Lesser General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 *  
 *  $Id$
 */
package org.exist.xquery;

import org.apache.commons.io.output.ByteArrayOutputStream;

import java.io.File;
import java.io.FileFilter;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;

import org.exist.xmldb.XQueryService;
import org.exist.xmldb.XmldbURI;

import org.xmldb.api.DatabaseManager;
import org.xmldb.api.base.Collection;
import org.xmldb.api.base.Database;
import org.xmldb.api.base.ResourceSet;
import org.xmldb.api.modules.CollectionManagementService;
import org.xmldb.api.modules.XMLResource;

/**
 * @author Wolfgang Meier (wolfgang@exist-db.org)
 */
public class XQueryUseCase {

    private final static String baseDir = "samples/xquery/use-cases";

    private Collection root = null;

    /*
     * @see TestCase#setUp()
     */
    protected void setUp() throws Exception {
        // initialize driver
        Class<?> cl = Class.forName("org.exist.xmldb.DatabaseImpl");
        Database database = (Database) cl.newInstance();
        database.setProperty("create-database", "true");
        DatabaseManager.registerDatabase(database);
        root = DatabaseManager.getCollection(XmldbURI.LOCAL_DB, "admin", "");
    }

    public void doTest(String useCase) throws Exception {
        CollectionManagementService service = (CollectionManagementService) root
                .getService("CollectionManagementService", "1.0");
        root = service.createCollection(useCase);

        File file = new File(baseDir + File.separatorChar + useCase);
        if (!(file.canRead() && file.isDirectory()))
            throw new RuntimeException("Cannot read data for use-case " + useCase);
        setupData(file);
        processQueries(file);
    }

    protected void processQueries(File file) throws Exception {
        File[] files = file.listFiles(new FileFilter() {
            public boolean accept(File pathname) {
                return pathname.getName().startsWith("q") && pathname.getName().endsWith(".xq");
            }
        });
        for (int i = 0; i < files.length; i++) {
            System.out.println("processing use-case: " + files[i].getAbsolutePath());
            System.out.println("========================================================================");
            String query = readQuery(files[i]);
            System.out.println(query);
            System.out.println("_________________________________________________________________________________");
            XQueryService service = (XQueryService) root.getService("XQueryService", "1.0");
            ResourceSet results;
            try {
                results = service.query(query);
                for (int j = 0; j < results.getSize(); j++) {
                    String output = (String) results.getResource(j).getContent();
                    System.out.println(output);
                }
            } catch (Exception e) {
                Throwable cause = e.getCause();
                if (cause == null)
                    cause = e;
                System.err.println("Exception: " + e.getClass() + " - " + cause);
                for (int j = 0; j < 4; j++) {
                    StackTraceElement el = cause.getStackTrace()[j];
                    System.err.println(el);
                }
                e.getStackTrace();
                // rethrow for JUnit reporting
                throw e;
            }
            System.out.println("========================================================================");
        }
    }

    protected void setupData(File file) throws Exception {
        File[] files = file.listFiles(new FileFilter() {
            public boolean accept(File pathname) {
                return pathname.getName().endsWith(".xml");
            }
        });
        for (int i = 0; i < files.length; i++) {
            XMLResource res = (XMLResource) root.createResource(files[i].getName(), "XMLResource");
            res.setContent(files[i]);
            root.storeResource(res);
        }
    }

    protected String readQuery(File f) throws IOException {
        ByteArrayOutputStream os = new ByteArrayOutputStream();
        byte[] t = new byte[512];
        InputStream is = new FileInputStream(f);
        try {
            int count = 0;
            while ((count = is.read(t)) != -1) {
                os.write(t, 0, count);
            }
            return new String(os.toString("UTF-8"));
        } finally {
            is.close();
            os.close();
        }
    }
}