diff options
Diffstat (limited to 'eclipse/plugins/com.android.ide.eclipse.adt/src/com/android/ide/eclipse/adt/internal/editors/layout/gre/RuleLoader.java')
| -rw-r--r-- | eclipse/plugins/com.android.ide.eclipse.adt/src/com/android/ide/eclipse/adt/internal/editors/layout/gre/RuleLoader.java | 192 |
1 files changed, 0 insertions, 192 deletions
diff --git a/eclipse/plugins/com.android.ide.eclipse.adt/src/com/android/ide/eclipse/adt/internal/editors/layout/gre/RuleLoader.java b/eclipse/plugins/com.android.ide.eclipse.adt/src/com/android/ide/eclipse/adt/internal/editors/layout/gre/RuleLoader.java deleted file mode 100644 index 4f49a7545..000000000 --- a/eclipse/plugins/com.android.ide.eclipse.adt/src/com/android/ide/eclipse/adt/internal/editors/layout/gre/RuleLoader.java +++ /dev/null @@ -1,192 +0,0 @@ -/* - * Copyright (C) 2011 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.adt.internal.editors.layout.gre; - -import com.android.ide.common.api.IViewRule; -import com.android.ide.eclipse.adt.AdtPlugin; -import com.android.ide.eclipse.adt.internal.sdk.ProjectState; -import com.android.ide.eclipse.adt.internal.sdk.Sdk; -import com.android.sdklib.internal.project.ProjectProperties; -import com.android.utils.Pair; - -import org.eclipse.core.resources.IProject; -import org.eclipse.core.runtime.CoreException; -import org.eclipse.core.runtime.IStatus; -import org.eclipse.core.runtime.QualifiedName; - -import java.io.File; -import java.net.MalformedURLException; -import java.net.URL; -import java.net.URLClassLoader; -import java.util.ArrayList; -import java.util.List; - -/** - * The {@link RuleLoader} is responsible for loading (and unloading) - * {@link IViewRule} classes. There is typically one {@link RuleLoader} - * per project. - */ -public class RuleLoader { - /** - * Qualified name for the per-project non-persistent property storing the - * {@link RuleLoader} for this project - */ - private final static QualifiedName RULE_LOADER = new QualifiedName(AdtPlugin.PLUGIN_ID, - "ruleloader"); //$NON-NLS-1$ - - private final IProject mProject; - private ClassLoader mUserClassLoader; - private List<Pair<File, Long>> mUserJarTimeStamps; - private long mLastCheckTimeStamp; - - /** - * Flag set when we've attempted to initialize the {@link #mUserClassLoader} - * already - */ - private boolean mUserClassLoaderInited; - - /** - * Returns the {@link RuleLoader} for the given project - * - * @param project the project the loader is associated with - * @return an {@RuleLoader} for the given project, - * never null - */ - public static RuleLoader get(IProject project) { - RuleLoader loader = null; - try { - loader = (RuleLoader) project.getSessionProperty(RULE_LOADER); - } catch (CoreException e) { - // Not a problem; we will just create a new one - } - if (loader == null) { - loader = new RuleLoader(project); - try { - project.setSessionProperty(RULE_LOADER, loader); - } catch (CoreException e) { - AdtPlugin.log(e, "Can't store RuleLoader"); - } - } - return loader; - } - - /** Do not call; use the {@link #get} factory method instead. */ - private RuleLoader(IProject project) { - mProject = project; - } - - /** - * Find out whether the given project has 3rd party ViewRules, and if so - * return a ClassLoader which can locate them. If not, return null. - * @param project The project to load user rules from - * @return A class loader which can user view rules, or otherwise null - */ - private ClassLoader computeUserClassLoader(IProject project) { - // Default place to locate layout rules. The user may also add to this - // path by defining a config property specifying - // additional .jar files to search via a the layoutrules.jars property. - ProjectState state = Sdk.getProjectState(project); - ProjectProperties projectProperties = state.getProperties(); - - // Ensure we have the latest & greatest version of the properties. - // This allows users to reopen editors in a running Eclipse instance - // to get updated view rule jars - projectProperties.reload(); - - String path = projectProperties.getProperty( - ProjectProperties.PROPERTY_RULES_PATH); - - if (path != null && path.length() > 0) { - - mUserJarTimeStamps = new ArrayList<Pair<File, Long>>(); - mLastCheckTimeStamp = System.currentTimeMillis(); - - List<URL> urls = new ArrayList<URL>(); - String[] pathElements = path.split(File.pathSeparator); - for (String pathElement : pathElements) { - pathElement = pathElement.trim(); // Avoid problems with trailing whitespace etc - File pathFile = new File(pathElement); - if (!pathFile.isAbsolute()) { - pathFile = new File(project.getLocation().toFile(), pathElement); - } - // Directories and jar files are okay. Do we need to - // validate the files here as .jar files? - if (pathFile.isFile() || pathFile.isDirectory()) { - URL url; - try { - url = pathFile.toURI().toURL(); - urls.add(url); - - mUserJarTimeStamps.add(Pair.of(pathFile, pathFile.lastModified())); - } catch (MalformedURLException e) { - AdtPlugin.log(IStatus.WARNING, - "Invalid URL: %1$s", //$NON-NLS-1$ - e.toString()); - } - } - } - - if (urls.size() > 0) { - return new URLClassLoader(urls.toArray(new URL[urls.size()]), - RulesEngine.class.getClassLoader()); - } - } - - return null; - } - - /** - * Return the class loader to use for custom views, or null if no custom - * view rules are registered for the project. Note that this class loader - * can change over time (if the jar files are updated), so callers should be - * prepared to unload previous instances. - * - * @return a class loader to use for custom view rules, or null - */ - public ClassLoader getClassLoader() { - if (mUserClassLoader == null) { - // Only attempt to load rule paths once. - // TODO: Check the timestamp on the project.properties file so we can dynamically - // pick up cases where the user edits the path - if (!mUserClassLoaderInited) { - mUserClassLoaderInited = true; - mUserClassLoader = computeUserClassLoader(mProject); - } - } else { - // Check the timestamp on the jar files in the custom view path to see if we - // need to reload the classes (but only do this at most every 3 seconds) - if (mUserJarTimeStamps != null) { - long time = System.currentTimeMillis(); - if (time - mLastCheckTimeStamp > 3000) { - mLastCheckTimeStamp = time; - for (Pair<File, Long> pair : mUserJarTimeStamps) { - File file = pair.getFirst(); - Long prevModified = pair.getSecond(); - long modified = file.lastModified(); - if (prevModified.longValue() != modified) { - mUserClassLoaderInited = true; - mUserJarTimeStamps = null; - mUserClassLoader = computeUserClassLoader(mProject); - } - } - } - } - } - - return mUserClassLoader; - } -} |