projectparser.java

java 调用windows的api

package org.jawin.browser.project;

import org.xml.sax.ext.*;
import org.xml.sax.*;
import org.xml.sax.helpers.*;

import java.io.*;

import org.jawin.browser.config.ConfigManager;
import org.jawin.browser.log.Log;

/**
 * Parses Project items from a project file
 *
 * <p>Title: Jawin Code Generation GUI</p>
 * <p>Description: GUI for exploring type libraries and generating Java code</p>
 * <p>Copyright: Copyright (c) 2003</p>
 * <p>Company: Open Source Incentive</p>
 *
 * @author Josh Passenger
 * @version 1.0
 */

public class ProjectParser extends DefaultHandler
{
	/**
	 * The Sax parser class to use
	 */
	private String parserName = ConfigManager.getInstance().getString("sax.parser", "org.apache.xerces.parsers.SAXParser");

	/**
	 * The parser that will actually pasre the document
	 */
	private XMLReader xmlReader = null;

	private Project project = null;

	public ProjectParser()
	{
		try
		{
			xmlReader = XMLReaderFactory.createXMLReader(parserName);
			xmlReader.setContentHandler(this);
		}
		catch (Exception e)
		{
			Log.getInstance().exception("ProjectParser() failed to create SAX parser, no project file was loaded", e);
		}
	}

	/**
	 * Parses a project file on disk
	 *
	 * @param projectFile
	 */
	public Project parseProjectFile(String projectFile)
	{
		FileInputStream fileIn = null;

		try
		{
			fileIn = new FileInputStream(projectFile);
			InputSource in = new InputSource(fileIn);
			xmlReader.parse(in);
		}
		catch (Exception e)
		{
			Log.getInstance().exception("ProjectParser.parseProjectFile() failed to parse project: " + projectFile, e);
		}
		finally
		{
			if (fileIn != null)
			{
				try
				{
					fileIn.close();
				}
				catch (Exception e)
				{

				}
			}
		}

		return project;
	}

	/**
	 * Fired when the start of a document is encountered
	 *
	 * @throws SAXException thrown if something goes wrong
	 */
	public void startDocument() throws SAXException
	{
		project = null;
	}

	/**
	 * Fired when an element is started
	 *
	 * @param uri
	 * @param localName
	 * @param qualifiedName
	 * @param attributes
	 * @throws SAXException
	 */
	public void startElement(String uri, String localName, String qualifiedName, Attributes attributes) throws SAXException
	{

		if (qualifiedName.equals("project"))
		{
			String projectFile = getAttribute("projectFile", attributes);

			project = new Project(projectFile);
			return;
		}

		if (qualifiedName.equals("projectItem"))
		{
			String name = attributes.getValue("name");
			String libraryFile = getAttribute("libraryFile", attributes);
			String packageName = attributes.getValue("package");
			String saveDirectory = attributes.getValue("saveDirectory");
			String javaEncodingDirectory = attributes.getValue("javaEncoding");

			ProjectItem projectItem = new ProjectItem(libraryFile, name, packageName, saveDirectory, javaEncodingDirectory);

			project.addProjectItem(projectItem);

			return;
		}
	}

	public void endElement(String uri, String localName, String qualifiedName) throws SAXException
	{

	}

	/**
	 * Fetches the value of a required attribute
	 *
	 * @param name the name of the attribute to fetch
	 * @param attributes the attributes on the node
	 * @return the value of the named attribute
	 * @throws SAXException thrown if the attribute does not exist
	 */
	private String getAttribute(String name, Attributes attributes) throws SAXException
	{
		String value = attributes.getValue(name);

		if (value == null || value.equals(""))
		{
			throw new SAXException("ProjectParser.getAttribute() a required attribute was missing: " + name);
		}

		return value;
	}

	public void characters(char [] chars, int start, int length) throws SAXException
	{

	}

}