/*   Copyright 2004 The Apache Software Foundation
 *
 *   Licensed under the Apache License, Version 2.0 (the "License");
 *   you may not use this file except in compliance with the License.
 *   You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *
 *   Unless required by applicable law or agreed to in writing, software
 *   distributed under the License is distributed on an "AS IS" BASIS,
 *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *   See the License for the specific language governing permissions and
 *  limitations under the License.
 */

package org.apache.xmlbeans.impl.xpath.jaxen;

import org.jaxen.XPath;
import org.jaxen.JaxenException;
import org.apache.xmlbeans.XmlObject;
import org.apache.xmlbeans.XmlCursor;
import org.apache.xmlbeans.XmlBeans;
import org.apache.xmlbeans.XmlException;
import org.apache.xmlbeans.impl.xpath.jaxen.XBeansXPath;

import java.util.List;
import java.util.Iterator;
import java.io.File;
import java.io.IOException;

/**
 * Author: Cezar Andrei (cezar.andrei at bea.com)
 * Date: Oct 10, 2003
 */
public class XBeansDemo
{
    public static void main(String[] args)
    {
        try
        {
            String xpathStr;
            File file;

            if (args.length!=2)
            {
                System.out.println("Usage: XBeansDemo file.xml xpath");
                return;
            }
            else
            {
                file = new File(args[0]);
                xpathStr = args[1];
            }

            test1(xpathStr, file);

            test3(xpathStr, file);
        }
        catch (Exception e)
        {
            e.printStackTrace();
        }
    }

    private static void test1(String xpathStr, File file)
    {
        System.out.println("\n ----- test1:   XBeansXPath.selectNodes(xpathStr) Navigator: XmlBookmarks + 1 XmlCursor embeded in the bookmark -----");

        try
        {
            XmlObject doc = XmlObject.Factory.parse(file);
            XPath xpath = new XBeansXPath(xpathStr);
            XmlCursor xc = doc.newCursor();
            List results = xpath.selectNodes(xc);

            Iterator resultIter = results.iterator();

            System.out.println("Document :: " + doc );
            System.out.println("   XPath :: " + xpath );
            System.out.println("");
            System.out.println("Results" );
            System.out.println("----------------------------------");

            while ( resultIter.hasNext() )
            {
                xc = (XmlCursor)resultIter.next();
                System.out.println( xc );
            }
            System.out.println("----------------------------------");
            System.out.println(results.size() );
        }
        catch (XmlException e)
        {
            e.printStackTrace();
        }
        catch (IOException e)
        {
            e.printStackTrace();
        }
        catch (JaxenException e)
        {
            e.printStackTrace();
        }
    }

	private static void test3(String xpathStr, File file)
    {
        System.out.println("\n ----- test3:   XmlCursor.selectPath(cpath)  -----");

        try
        {
            String cpath = XmlBeans.compilePath( xpathStr );
            XmlObject doc = XmlObject.Factory.parse(file);
            XmlCursor speaker = doc.newCursor();

            int count = 0;
			speaker.toStartDoc();
			speaker.selectPath(cpath);
			speaker.getSelectionCount();
			while ( speaker.toNextSelection() )
			{
				System.out.println(speaker);
				count += (speaker == null ? 0 : 1);
			}

            System.out.println(">>> " + count + " selections");
        }
        catch (XmlException e)
        {
            e.printStackTrace();
        }
        catch (IOException e)
        {
            e.printStackTrace();
        }
    }
}