| /******************************************************************************* |
| * Copyright (c) 2006 Oracle Corporation. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * Gerry Kessler/Oracle - initial API and implementation |
| * |
| ********************************************************************************/ |
| |
| package org.eclipse.jst.jsf.metadataprocessors.internal; |
| |
| import java.util.HashMap; |
| import java.util.Map; |
| |
| import org.eclipse.core.runtime.IStatus; |
| import org.eclipse.core.runtime.Platform; |
| import org.eclipse.jst.jsf.core.internal.JSFCorePlugin; |
| import org.eclipse.jst.jsf.metadataprocessors.IMetaDataEnabledFeature; |
| import org.eclipse.jst.jsf.metadataprocessors.IType; |
| import org.eclipse.jst.jsf.metadataprocessors.ITypeDescriptor; |
| import org.osgi.framework.Bundle; |
| |
| /** |
| * Factory producing <code>IMetaDataEnabledFeature</code>s from |
| * <code>IType</code> objects that implement a specified feature |
| * |
| * @author Gerry Kessler - Oracle |
| * |
| */ |
| public final class MetaDataEnabledFeatureAdapterFactory { |
| private static MetaDataEnabledFeatureAdapterFactory INSTANCE; |
| private Map<String, Class> typesCache; |
| /** |
| * @return singleton instance |
| */ |
| public static MetaDataEnabledFeatureAdapterFactory getInstance(){ |
| if (INSTANCE == null){ |
| INSTANCE = new MetaDataEnabledFeatureAdapterFactory(); |
| } |
| return INSTANCE; |
| } |
| |
| private MetaDataEnabledFeatureAdapterFactory(){ |
| super(); |
| typesCache = new HashMap<String, Class>(); |
| } |
| |
| |
| /** |
| * Given the feature extension, create and return the {@link IMetaDataEnabledFeature} for a given processing feature |
| * @param feature |
| * @param processingFeature class |
| * @return IMetaDataEnabledFeature |
| */ |
| public IMetaDataEnabledFeature getFeatureAdapter(IMetaDataEnabledFeatureExtension feature, Class processingFeature){ |
| if (feature != null){ |
| return createFeature(feature, processingFeature); |
| } |
| return null; |
| } |
| |
| /** |
| * Given the feature extension, create and return the {@link IMetaDataEnabledFeature} for a given processing feature if |
| * that the type that the feature is bound to is a subclass of the the type |
| * @param feature |
| * @param processingFeature class |
| * @param type |
| * @return IMetaDataEnabledFeature. <br>Will return null if the type that the feature extension is bound to, |
| * is not a subclass of the supplied type |
| */ |
| public IMetaDataEnabledFeature getFeatureAdapterForSubclass(IMetaDataEnabledFeatureExtension feature, Class processingFeature, IType type){ |
| if (feature != null ){ |
| ITypeDescriptor aType = AttributeValueRuntimeTypeFactory.getInstance().getType(feature.getTypeID()); |
| Class klass = aType.getTypeExtension().getClass(); |
| if (klass.asSubclass(type.getClass()) != null) |
| return createFeature(feature, processingFeature); |
| } |
| return null; |
| } |
| |
| // private Class getOrCreateTypeClassFor(IMetaDataEnabledFeatureExtension featureExt){ |
| // Class klass = null; |
| // String className; |
| // ITypeDescriptor type = AttributeValueRuntimeTypeFactory.getInstance().getType(featureExt.getTypeID()); |
| // try { |
| // if (! typesCache.containsKey(featureExt.getTypeID())){ |
| // Bundle bundle =Platform.getBundle(featureExt.getBundleID()); |
| // if (bundle == null){ |
| // JSFCorePlugin.log(IStatus.ERROR, featureExt.getBundleID() + " could not be created to load " + className); |
| // return null; |
| // } |
| // klass = bundle.loadClass(className); |
| // if (klass != null){ |
| // typesCache.put(featureExt.getTypeID(), klass); |
| // } |
| // } |
| // else |
| // klass = typesCache.get(featureExt.getTypeID()); |
| // |
| // return klass; |
| // if (!IMetaDataEnabledFeature.class.isAssignableFrom(klass)){ |
| // JSFCorePlugin.log(IStatus.INFO, className + " is not a IMetaDataEnabledFeature. " + featureExt.getBundleID() +" : " + featureExt.getTypeID()); |
| // } |
| // else if (klass != null && processingFeature.isAssignableFrom(klass)){ |
| // IMetaDataEnabledFeature obj = (IMetaDataEnabledFeature)klass.newInstance(); |
| // return obj; |
| // } |
| // |
| // } catch (ClassNotFoundException e) { |
| // JSFCorePlugin.log(IStatus.ERROR, className + " was not found in " + featureExt.getBundleID() +" for " + featureExt.getTypeID()); |
| // } catch (InstantiationException e) { |
| // JSFCorePlugin.log(IStatus.ERROR, "InstantiationException: " + className + " in " + featureExt.getBundleID() +" for " + featureExt.getTypeID()); |
| // } catch (IllegalAccessException e) { |
| // JSFCorePlugin.log(IStatus.ERROR, "IllegalAccessException: " + className + " in " + featureExt.getBundleID() +" for " + featureExt.getTypeID()); |
| // } |
| // return null; |
| // } |
| |
| private IMetaDataEnabledFeature createFeature(IMetaDataEnabledFeatureExtension featureExt, Class processingFeature){ |
| String className = featureExt.getClassName(); |
| Class klass = null; |
| try { |
| if (! typesCache.containsKey(featureExt.getTypeID())){ |
| Bundle bundle =Platform.getBundle(featureExt.getBundleID()); |
| if (bundle == null){ |
| JSFCorePlugin.log(IStatus.ERROR, featureExt.getBundleID() + " could not be created to load " + className); |
| return null; |
| } |
| klass = bundle.loadClass(className); |
| if (klass != null){ |
| typesCache.put(featureExt.getTypeID(), klass); |
| } |
| } |
| else |
| klass = typesCache.get(featureExt.getTypeID()); |
| |
| if (!IMetaDataEnabledFeature.class.isAssignableFrom(klass)){ |
| JSFCorePlugin.log(IStatus.INFO, className + " is not a IMetaDataEnabledFeature. " + featureExt.getBundleID() +" : " + featureExt.getTypeID()); |
| } |
| else if (klass != null && processingFeature.isAssignableFrom(klass)){ |
| IMetaDataEnabledFeature obj = (IMetaDataEnabledFeature)klass.newInstance(); |
| return obj; |
| } |
| |
| } catch (ClassNotFoundException e) { |
| JSFCorePlugin.log(IStatus.ERROR, className + " was not found in " + featureExt.getBundleID() +" for " + featureExt.getTypeID()); |
| } catch (InstantiationException e) { |
| JSFCorePlugin.log(IStatus.ERROR, "InstantiationException: " + className + " in " + featureExt.getBundleID() +" for " + featureExt.getTypeID()); |
| } catch (IllegalAccessException e) { |
| JSFCorePlugin.log(IStatus.ERROR, "IllegalAccessException: " + className + " in " + featureExt.getBundleID() +" for " + featureExt.getTypeID()); |
| } |
| return null; |
| } |
| |
| } |