ruper2/src/java/core/org/krysalis/ruper2/util/net VirtualResourceLocator.java,NONE,1.1

Update of /cvsroot/metamorphosis/ruper2/src/java/core/org/krysalis/ruper2/util/net
In directory sc8-pr-cvs1:/tmp/cvs-serv17634/src/java/core/org/krysalis/ruper2/util/net

Added Files:
	VirtualResourceLocator.java 
Log Message:
1) Moved VirtualResourceLocator ot a .util.net package
2) Fixed it up a litte, still pretty crude (but working).

--- NEW FILE: VirtualResourceLocator.java ---
/*
 * Created on Aug 23, 2003
 *
 */
package org.krysalis.ruper2.util.net;

import java.io.File;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.StringTokenizer;

import org.krysalis.ruper2.protocols.Protocol;
import org.krysalis.ruper2.util.RuperConstants;

/**
 * @author arb_jack
 * 
 * This class exists for two reasons:
 * 
 * 1) So we can separate ourselves from VFS FileObjects (yet still
 * leverage VFS and benefit from it's manage protocols.)
 * 
 * 2) because java.net.URL won't allow protocols that java.net 
 * can't process. A shame. Not sure if the Java URI class is better 
 * about this, but we want to be compatible over older JDKs and also
 * this is an L not an I. 
 * 
 */
public class VirtualResourceLocator {

	public static final String VRL_CLASSNAME =
		VirtualResourceLocator.class.getName();

	private String m_url = null;

	// Parsed out..
	private String m_protocol = null;
	private boolean m_isDirectory = false;

	public VirtualResourceLocator(String url) {
		parseString(url);
	}

	public VirtualResourceLocator(VirtualResourceLocator context, String url) {
		// :TODO: Basic right now, just concatenates
		parseString(context + (context.isDirectory() ? "" : "/") + url);
	}

	public VirtualResourceLocator(URL url) {
		parseString(url.toExternalForm());
	}

	public VirtualResourceLocator(File file) {
		parseString(createURLForFile(file));
	}

	private void parseString(String url) {
		m_url = url;

		// Extract Protocol
		int colonPosn = url.indexOf(':');
		if (-1 != colonPosn)
			m_protocol = url.substring(0, colonPosn);
		else
			m_protocol = Protocol.HTTP_PROTOCOL;

		m_isDirectory = m_url.endsWith("/");
	}

	private String createURLForFile(File file) {
		StringBuffer url = new StringBuffer("file://");
		String path = file.getAbsolutePath();
		for (StringTokenizer tokens = new StringTokenizer(path, "\\");
			tokens.hasMoreTokens();
			) {

			url.append(tokens.nextToken());

			if (tokens.hasMoreTokens())
				url.append('/');
		}

		return url.toString();
	}
	/**
	 * May not be possible for all VirtualResourceLocators
	 * 
	 * @return
	 * @throws MalformedURLException
	 */
	public URL getResourceLocator() throws MalformedURLException {
		return new URL(m_url);
	}

	public String getProtocol() {
		return m_protocol;
	}

	public String toString() {
		return toExternalForm();
	}

	public String toExternalForm() {
		return m_url;
	}

	private String getURLNoEndingSlash() {
		String me = toExternalForm();
		int length = me.length();
		if (isDirectory())
			me = me.substring(0, length - 1);
		return me;
	}

	public String getBasename() {
		String me = getURLNoEndingSlash();

		int sepPosn = me.lastIndexOf('/');
		return (-1 == sepPosn) ? me : me.substring(sepPosn + 1);
	}

	public VirtualResourceLocator getParent() {
		String parentString = null;

		String me = getURLNoEndingSlash();
		int sepPosn = me.lastIndexOf('/');

		if (-1 != sepPosn)
			parentString = me.substring(0, sepPosn + 1);

		return (null == parentString)
			? null
			: new VirtualResourceLocator(parentString);
	}

	//
	// :TODO: A guess, at best
	//
	public boolean isDirectory() {
		return m_isDirectory;
	}

	public boolean equals(Object obj) {
		boolean isEqual = false;
		if (obj instanceof VirtualResourceLocator) {
			VirtualResourceLocator rhs = (VirtualResourceLocator) obj;
			if (m_protocol.equals(rhs.m_protocol) && m_url.equals(rhs.m_url)) {
				isEqual = true;
			}
		}
		return isEqual;
	}

	public static VirtualResourceLocator getTestVRL() {
		return new VirtualResourceLocator(RuperConstants.RUPER_HOME);
	}
}




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