ResourceFileDependencyProvider.java

/*  Copyright (C) 2009 Mobile Sorcery AB

    This program is free software; you can redistribute it and/or modify it
    under the terms of the Eclipse Public License v1.0.

    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 Eclipse Public License v1.0 for
    more details.

    You should have received a copy of the Eclipse Public License v1.0 along
    with this program. It is also available at http://www.eclipse.org/legal/epl-v10.html
*/
package com.mobilesorcery.sdk.internal.dependencies;

import java.io.IOException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.HashMap;
import java.util.Map;

import org.eclipse.core.resources.IContainer;
import org.eclipse.core.resources.IFile;
import org.eclipse.core.resources.IProject;
import org.eclipse.core.resources.IResource;
import org.eclipse.core.resources.ResourcesPlugin;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IPath;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Path;
import org.eclipse.core.runtime.Status;

import com.mobilesorcery.sdk.core.CoreMoSyncPlugin;
import com.mobilesorcery.sdk.core.IBuildVariant;
import com.mobilesorcery.sdk.core.MoSyncBuilder;
import com.mobilesorcery.sdk.core.MoSyncProject;
import com.mobilesorcery.sdk.internal.PipeTool;
import com.mobilesorcery.sdk.internal.builder.MoSyncResourceBuilderVisitor;

public class ResourceFileDependencyProvider implements
		IDependencyProvider<IResource> {

	private static final Map<IResource, Collection<IResource>> EMPTY = new HashMap<IResource, Collection<IResource>>();

	private final MoSyncProject project;

	private final IBuildVariant variant;

	public ResourceFileDependencyProvider(MoSyncProject project, IBuildVariant variant) {
		this.project = project;
		this.variant = variant;
	}

	@Override
	public Map<IResource, Collection<IResource>> computeDependenciesOf(IResource obj) throws CoreException {
		// TODO: Use centralized:
		IPath resourceOutputPath = MoSyncBuilder.getResourceOutputPath(project.getWrappedProject(), variant);
		IFile[] resourceOutputFiles = ResourcesPlugin.getWorkspace().getRoot().findFilesForLocationURI(resourceOutputPath.toFile().toURI());

		// We use a mini-hack to get the desired results;
		// first, we let every .lst file depend on the project's
		// resource file. The dependencies generated by pipetool
		// is an aggregate of all resources in the project's .lst files.
		HashMap<IResource, Collection<IResource>> result = new HashMap<IResource, Collection<IResource>>();
		for (IFile resourceOutputFile : resourceOutputFiles) {
			if (MoSyncBuilder.isResourceFile(obj)) {
				result.put(obj, new ArrayList(Arrays.asList(resourceOutputFile)));
			} else if (obj.equals(resourceOutputFile)) {
				try {
					GCCDependencyFileParser parser = new GCCDependencyFileParser();
					IPath depsFile = PipeTool.getResourcesDependencyFile(project.getWrappedProject(), variant);
					parser.parse(depsFile.toFile());
					result.putAll(parser.getDependencies());
				} catch (IOException e) {
					throw new CoreException(new Status(IStatus.ERROR,
							CoreMoSyncPlugin.PLUGIN_ID, e.getMessage(), e));
				}
			}
		}
		return result;
	}

}