plugins/org.eclipse.wst.common.emfworkbench.integration/src/org/eclipse/wst/common/modulecore/impl/PlatformURLModuleConnection.java

/*
 * Created on Jan 20, 2005
 *
 * TODO To change the template for this generated file go to
 * Window - Preferences - Java - Code Style - Code Templates
 */
package org.eclipse.wst.common.modulecore.impl;

import java.io.IOException;
import java.net.URL;
import java.util.HashMap;
import java.util.Map;

import org.eclipse.core.internal.boot.PlatformURLConnection;
import org.eclipse.core.internal.boot.PlatformURLHandler;
import org.eclipse.core.internal.utils.Policy;
import org.eclipse.core.resources.IContainer;
import org.eclipse.core.resources.IProject;
import org.eclipse.core.resources.ResourcesPlugin;
import org.eclipse.core.runtime.IPath;
import org.eclipse.core.runtime.Path;


/**
 * @author mdelder
 *
 * TODO To change the template for this generated type comment go to
 * Window - Preferences - Java - Code Style - Code Templates
 */
public class PlatformURLModuleConnection extends PlatformURLConnection {
     
    public static final String MODULE = "module:";  //$NON-NLS-1$
    
    private static Map moduleMap = new HashMap();
    
    static {
    	IProject container = ResourcesPlugin.getWorkspace().getRoot().getProject("Project");
    	moduleMap.put("MyModule", new ModuleHandle(container, new Path("modules/ejb-jar1")));    	
    }
    
    public PlatformURLModuleConnection(URL aURL) {
        super(aURL);        
    }

    
    /* (non-Javadoc)
     * @see org.eclipse.core.internal.boot.PlatformURLConnection#resolve()
     */
    protected URL resolve() throws IOException {
        System.out.println("URL: " + getURL());
        IPath moduleRelativePath = new Path(getURL().toExternalForm()); 
        String moduleName = moduleRelativePath.segment(1);        
        ModuleHandle handle = (ModuleHandle) moduleMap.get(moduleName);
        IPath resolvedPath = handle.getResolvedPath().append(moduleRelativePath.removeFirstSegments(2));           

		int count = resolvedPath.segmentCount(); 
		// if there are two segments then the second is a project name.
		IProject project = ResourcesPlugin.getWorkspace().getRoot().getProject(resolvedPath.segment(0));
		if (!project.exists()) {
			String message = Policy.bind("url.couldNotResolve", project.getName(), url.toExternalForm()); //$NON-NLS-1$
			throw new IOException(message);
		}
		IPath result = null;
		if (count == 2)
			result = project.getLocation();
		else {
			resolvedPath = resolvedPath.removeFirstSegments(2);
			result = project.getFile(resolvedPath).getLocation();
		}
		return new URL("file", "", result.toString()); //$NON-NLS-1$ //$NON-NLS-2$
		     
    }
    
    public static void startup() {
        PlatformURLHandler.register(PlatformURLModuleConnection.MODULE,PlatformURLModuleConnection.class);
    }
}

class ModuleHandle {
	public final IContainer container;
	public final IPath sourcePath;
	public ModuleHandle(IContainer aContainer, IPath aSourcePath) {
		container = aContainer;
		sourcePath = aSourcePath;
	}
	
	public IPath getResolvedPath() {
		return container.getFolder(sourcePath).getFullPath();
	}
}