/*
* Copyright (C) 2007 The Android Open Source Project
*
* Licensed under the Eclipse Public License, Version 1.0 (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.eclipse.org/org/documents/epl-v10.php
*
* 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 com.android.ide.eclipse.editors.resources.manager;
import com.android.ide.eclipse.adt.AdtPlugin;
import com.android.ide.eclipse.common.AndroidConstants;
import com.android.ide.eclipse.common.project.AndroidManifestParser;
import com.android.ide.eclipse.common.resources.ResourceType;
import com.android.ide.eclipse.editors.resources.manager.ResourceMonitor.IFileListener;
import com.android.ide.eclipse.editors.resources.manager.ResourceMonitor.IProjectListener;
import org.eclipse.core.resources.IFile;
import org.eclipse.core.resources.IMarkerDelta;
import org.eclipse.core.resources.IProject;
import org.eclipse.core.resources.IResourceDelta;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IStatus;
import java.lang.reflect.Field;
import java.lang.reflect.Modifier;
import java.util.HashMap;
import java.util.Map;
/**
* A monitor for the compiled resources. This only monitors changes in the resources of type
* {@link ResourceType#ID}.
*/
public final class CompiledResourcesMonitor implements IFileListener, IProjectListener {
private final static CompiledResourcesMonitor sThis = new CompiledResourcesMonitor();
/**
* Sets up the monitoring system.
* @param monitor The main Resource Monitor.
*/
public static void setupMonitor(ResourceMonitor monitor) {
monitor.addFileListener(sThis, IResourceDelta.ADDED | IResourceDelta.CHANGED);
monitor.addProjectListener(sThis);
}
/**
* private constructor to prevent construction.
*/
private CompiledResourcesMonitor() {
}
/* (non-Javadoc)
* Sent when a file changed : if the file is the R class, then it is parsed again to update
* the internal data.
*
* @param file The file that changed.
* @param markerDeltas The marker deltas for the file.
* @param kind The change kind. This is equivalent to
* {@link IResourceDelta#accept(IResourceDeltaVisitor)}
*
* @see IFileListener#fileChanged
*/
public void fileChanged(IFile file, IMarkerDelta[] markerDeltas, int kind) {
if (file.getName().equals(AndroidConstants.FN_COMPILED_RESOURCE_CLASS)) {
loadAndParseRClass(file.getProject());
}
}
/**
* Processes project close event.
*/
public void projectClosed(IProject project) {
// the ProjectResources object will be removed by the ResourceManager.
}
/**
* Processes project delete event.
*/
public void projectDeleted(IProject project) {
// the ProjectResources object will be removed by the ResourceManager.
}
/**
* Processes project open event.
*/
public void projectOpened(IProject project) {
// when the project is opened, we get an ADDED event for each file, so we don't
// need to do anything here.
}
/**
* Processes existing project at init time.
*/
public void projectOpenedWithWorkspace(IProject project) {
try {
// check this is an android project
if (project.hasNature(AndroidConstants.NATURE)) {
loadAndParseRClass(project);
}
} catch (CoreException e) {
// pass
}
}
private void loadAndParseRClass(IProject project) {
try {
// first check there's a ProjectResources to store the content
ProjectResources projectResources = ResourceManager.getInstance().getProjectResources(
project);
if (projectResources != null) {
// create the classname
String className = getRClassName(project);
if (className == null) {
// We need to abort.
AdtPlugin.log(IStatus.ERROR,
"loadAndParseRClass: failed to find manifest package for project %1$s", //$NON-NLS-1$
project.getName());
return;
}
// create a temporary class loader to load it.
ProjectClassLoader loader = new ProjectClassLoader(null /* parentClassLoader */,
project);
try {
Class<?> clazz = loader.loadClass(className);
if (clazz != null) {
// create the maps to store the result of the parsing
Map<String, Map<String, Integer>> resourceValueMap =
new HashMap<String, Map<String, Integer>>();
Map<Integer, String[]> genericValueToNameMap =
new HashMap<Integer, String[]>();
Map<IntArrayWrapper, String> styleableValueToNameMap =
new HashMap<IntArrayWrapper, String>();
// parse the class
if (parseClass(clazz, genericValueToNameMap, styleableValueToNameMap,
resourceValueMap)) {
// now we associate the maps to the project.
projectResources.setCompiledResources(genericValueToNameMap,
styleableValueToNameMap, resourceValueMap);
}
}
} catch (Error e) {
// Log this error with the class name we're trying to load and abort.
AdtPlugin.log(e, "loadAndParseRClass failed to find class %1$s", className); //$NON-NLS-1$
}
}
} catch (ClassNotFoundException e) {
// pass
}
}
/**
* Parses a R class, and fills maps.
* @param rClass the class to parse
* @param genericValueToNameMap
* @param styleableValueToNameMap
* @param resourceValueMap
* @return True if we managed to parse the R class.
*/
private boolean parseClass(Class<?> rClass, Map<Integer, String[]> genericValueToNameMap,
Map<IntArrayWrapper, String> styleableValueToNameMap, Map<String,
Map<String, Integer>> resourceValueMap) {
try {
for (Class<?> inner : rClass.getDeclaredClasses()) {
String resType = inner.getSimpleName();
Map<String, Integer> fullMap = new HashMap<String, Integer>();
resourceValueMap.put(resType, fullMap);
for (Field f : inner.getDeclaredFields()) {
// only process static final fields.
int modifiers = f.getModifiers();
if (Modifier.isStatic(modifiers) && Modifier.isFinal(modifiers)) {
Class<?> type = f.getType();
if (type.isArray() && type.getComponentType() == int.class) {
// if the object is an int[] we put it in the styleable map
styleableValueToNameMap.put(new IntArrayWrapper((int[]) f.get(null)),
f.getName());
} else if (type == int.class) {
Integer value = (Integer) f.get(null);
genericValueToNameMap.put(value, new String[] { f.getName(), resType });
fullMap.put(f.getName(), value);
} else {
assert false;
}
}
}
}
return true;
} catch (IllegalArgumentException e) {
} catch (IllegalAccessException e) {
}
return false;
}
/**
* Returns the class name of the R class, based on the project's manifest's package.
*
* @return A class name (e.g. "my.app.R") or null if there's no valid package in the manifest.
*/
private String getRClassName(IProject project) {
try {
IFile manifestFile = AndroidManifestParser.getManifest(project);
AndroidManifestParser data = AndroidManifestParser.parseForData(manifestFile);
if (data != null) {
String javaPackage = data.getPackage();
return javaPackage + ".R"; //$NON-NLS-1$
}
} catch (CoreException e) {
// This will typically happen either because the manifest file is not present
// and/or the workspace needs to be refreshed.
AdtPlugin.logAndPrintError(e,
"Android Resources",
"Failed to find the package of the AndroidManifest of project %1$s. Reason: %2$s",
project.getName(),
e.getMessage());
}
return null;
}
}
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