diff options
Diffstat (limited to 'plugins/facet/org.eclipse.papyrus.emf.facet.util.emf.core/src/org/eclipse/emf/facet/util/emf/core/internal/serialization/SerializationRegistry.java')
| -rw-r--r-- | plugins/facet/org.eclipse.papyrus.emf.facet.util.emf.core/src/org/eclipse/emf/facet/util/emf/core/internal/serialization/SerializationRegistry.java | 133 |
1 files changed, 133 insertions, 0 deletions
diff --git a/plugins/facet/org.eclipse.papyrus.emf.facet.util.emf.core/src/org/eclipse/emf/facet/util/emf/core/internal/serialization/SerializationRegistry.java b/plugins/facet/org.eclipse.papyrus.emf.facet.util.emf.core/src/org/eclipse/emf/facet/util/emf/core/internal/serialization/SerializationRegistry.java new file mode 100644 index 00000000000..9a73c5c9f3e --- /dev/null +++ b/plugins/facet/org.eclipse.papyrus.emf.facet.util.emf.core/src/org/eclipse/emf/facet/util/emf/core/internal/serialization/SerializationRegistry.java @@ -0,0 +1,133 @@ +/*******************************************************************************
+ * Copyright (c) 2011 Mia-Software.
+ * 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:
+ * Nicolas Bros (Mia-Software) - initial API and implementation
+ * Laurent Pichierri (Soft-Maint) - Bug 371204 - Compatibility with Helios
+ *******************************************************************************/
+package org.eclipse.emf.facet.util.emf.core.internal.serialization;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+
+import org.eclipse.core.runtime.CoreException;
+import org.eclipse.core.runtime.IConfigurationElement;
+//import org.eclipse.emf.facet.infra.common.core.internal.extensions.AbstractRegistry;
+import org.eclipse.emf.facet.util.core.Logger;
+import org.eclipse.emf.facet.util.core.internal.exported.AbstractRegistry;
+import org.eclipse.emf.facet.util.emf.core.internal.Activator;
+import org.eclipse.emf.facet.util.emf.core.serialization.ISerializationRegistry;
+import org.eclipse.emf.facet.util.emf.core.serialization.ISerializer;
+
+/** Registry for the "serialization" extension point */
+public class SerializationRegistry extends AbstractRegistry implements ISerializationRegistry {
+
+ private static final String EXTENSION_POINT_NAMESPACE = "org.eclipse.emf.facet.util.emf.core"; //$NON-NLS-1$
+ private static final String EXTENSION_POINT_NAME = "serialization"; //$NON-NLS-1$
+
+ private static final String SERIALIZER_ELEMENT = "serializer"; //$NON-NLS-1$
+ private static final String CLASS_ATTRIBUTE = "class"; //$NON-NLS-1$
+
+ private static SerializationRegistry instance = null;
+
+ private final List<ISerializer<?>> serializers = new ArrayList<ISerializer<?>>();
+
+ public static SerializationRegistry getInstance() {
+ if (SerializationRegistry.instance == null) {
+ SerializationRegistry.instance = new SerializationRegistry();
+ }
+ return SerializationRegistry.instance;
+ }
+
+ public SerializationRegistry() {
+ initialize();
+ }
+
+ public List<ISerializer<?>> getSerializers() {
+ return Collections.unmodifiableList(this.serializers);
+ }
+
+ public ISerializer<?> getSerializerFor(final Class<?> type) {
+ for (ISerializer<?> serializer : this.serializers) {
+ if (serializer.getType().isAssignableFrom(type)) {
+ return serializer;
+ }
+ }
+ return null;
+ }
+
+ public ISerializer<?> getSerializerFor(final String type) {
+ for (ISerializer<?> serializer : this.serializers) {
+ if (serializer.getType().getName().equals(type)) {
+ return serializer;
+ }
+ }
+ return null;
+ }
+
+ @Override
+ protected String getExtensionPointName() {
+ return SerializationRegistry.EXTENSION_POINT_NAME;
+ }
+
+ @Override
+ protected String getExtensionPointNamespace() {
+ return SerializationRegistry.EXTENSION_POINT_NAMESPACE;
+ }
+
+ @Override
+ protected void handleRootElement(final IConfigurationElement configurationElement) {
+ final String name = configurationElement.getName();
+ if (name.equalsIgnoreCase(SerializationRegistry.SERIALIZER_ELEMENT)) {
+ readSerializerElement(configurationElement);
+ } else {
+ logUnknownElement(configurationElement);
+ }
+ }
+
+ /** Read a 'serializer' element */
+ private void readSerializerElement(final IConfigurationElement configurationElement) {
+ Object object;
+ try {
+ object = configurationElement
+ .createExecutableExtension(SerializationRegistry.CLASS_ATTRIBUTE);
+ } catch (CoreException e) {
+ Logger.logError(e, Activator.getDefault());
+ return;
+ }
+ if (object == null) {
+ logMissingAttribute(configurationElement, SerializationRegistry.CLASS_ATTRIBUTE);
+ return;
+ }
+
+ if (object instanceof ISerializer<?>) {
+ ISerializer<?> serializer = (ISerializer<?>) object;
+ ISerializer<?> existingSerializer = getSerializerFor(serializer.getType());
+ if (existingSerializer != null) {
+ logError(
+ configurationElement,
+ "Several serializers are provided for the type: " + serializer.getType().getName() + ". Only the first one will be used."); //$NON-NLS-1$ //$NON-NLS-2$
+
+ // always take the first one in the alphabetical order => determinism to avoid
+ // trying to serialize with one implementation and deserialize with an incompatible
+ // implementation
+ if (serializer.getClass().getName()
+ .compareTo(existingSerializer.getClass().getName()) < 0) {
+ // replace the already registered serializer by this one
+ this.serializers.remove(existingSerializer);
+ } else {
+ return;
+ }
+ }
+ this.serializers.add(serializer);
+ } else {
+ logError(configurationElement,
+ "class must implement " + ISerializer.class.getSimpleName()); //$NON-NLS-1$
+ }
+ }
+}
\ No newline at end of file |