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/*******************************************************************************
* Copyright (c) 2004, 2007 Boeing.
* 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:
* Boeing - initial API and implementation
*******************************************************************************/
package org.eclipse.osee.framework.skynet.core.attribute;
import java.util.Arrays;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Set;
import org.eclipse.core.runtime.IConfigurationElement;
import org.eclipse.core.runtime.IExtension;
import org.eclipse.core.runtime.Platform;
import org.eclipse.osee.framework.core.exception.OseeArgumentException;
import org.eclipse.osee.framework.core.exception.OseeCoreException;
import org.eclipse.osee.framework.core.exception.OseeExceptions;
import org.eclipse.osee.framework.core.exception.OseeStateException;
import org.eclipse.osee.framework.jdk.core.type.Pair;
import org.eclipse.osee.framework.jdk.core.util.Strings;
import org.eclipse.osee.framework.plugin.core.util.ExtensionPoints;
import org.eclipse.osee.framework.skynet.core.artifact.Attribute;
import org.eclipse.osee.framework.skynet.core.attribute.providers.AbstractAttributeDataProvider;
import org.eclipse.osee.framework.skynet.core.internal.Activator;
import org.osgi.framework.Bundle;
/**
* @author Roberto E. Escobar
*/
public class AttributeExtensionManager {
private static final String CLASS_ID = "class";
private static final String ATTRIBUTE_TYPE = Activator.PLUGIN_ID + ".AttributeType";
private static final String ATTRIBUTE_DATA_PROVIDER_TYPE = Activator.PLUGIN_ID + ".AttributeDataProvider";
private static final String[] attributeBaseTypes = new String[] {
"CharacterBackedAttributeType",
"BinaryBackedAttributeType"};
private static final String[] attributeProviderBaseTypes = new String[] {
"CharacterAttributeDataProvider",
"BinaryAttributeDataProvider"};
private static final AttributeExtensionManager instance = new AttributeExtensionManager();
private Map<String, Pair<String, String>> attributeTypeClasses;
private Map<String, Pair<String, String>> attributeDataProviderClasses;
private AttributeExtensionManager() {
this.attributeTypeClasses = null;
this.attributeDataProviderClasses = null;
}
public static String resolveAttributeBaseTypeId(String id) {
return resolveAttributeProviderTypeId(id);
}
public static String resolveAttributeProviderTypeId(String id) {
String newType = id;
if (!newType.contains(".")) {
newType = Activator.PLUGIN_ID + "." + newType;
}
return newType;
}
public static Class<? extends Attribute<?>> getAttributeClassFor(String name) throws OseeCoreException {
if (instance.attributeTypeClasses == null) {
instance.attributeTypeClasses = instance.loadExtensions(ATTRIBUTE_TYPE, attributeBaseTypes, CLASS_ID);
}
String resolved = resolveAttributeBaseTypeId(name);
Pair<String, String> entry = instance.attributeTypeClasses.get(resolved);
if (entry == null) {
throw new OseeArgumentException(String.format("Unable to find class for: [%s]", resolved));
}
return instance.loadClass(entry.getFirst(), entry.getSecond());
}
public static Class<? extends AbstractAttributeDataProvider> getAttributeProviderClassFor(String name) throws OseeCoreException {
if (instance.attributeDataProviderClasses == null) {
instance.attributeDataProviderClasses =
instance.loadExtensions(ATTRIBUTE_DATA_PROVIDER_TYPE, attributeProviderBaseTypes, CLASS_ID);
}
String resolved = resolveAttributeProviderTypeId(name);
Pair<String, String> entry = instance.attributeDataProviderClasses.get(resolved);
if (entry == null) {
throw new OseeArgumentException(String.format("Unable to find class for: [%s]", resolved));
}
return instance.loadClass(entry.getFirst(), entry.getSecond());
}
@SuppressWarnings("unchecked")
private <T> Class<T> loadClass(String bundleName, String className) throws OseeCoreException {
Class<T> toReturn = null;
try {
Bundle bundle = Platform.getBundle(bundleName);
toReturn = bundle.loadClass(className);
} catch (ClassNotFoundException ex) {
OseeExceptions.wrapAndThrow(ex);
}
return toReturn;
}
private Map<String, Pair<String, String>> loadExtensions(String extensionPointId, String[] elementNames, String classNameAttribute) throws OseeStateException {
Map<String, Pair<String, String>> toReturn = new HashMap<String, Pair<String, String>>();
for (String elementName : elementNames) {
List<IConfigurationElement> elements = ExtensionPoints.getExtensionElements(extensionPointId, elementName);
for (IConfigurationElement element : elements) {
IExtension extension = (IExtension) element.getParent();
String name = extension.getUniqueIdentifier();
String className = Strings.intern(element.getAttribute(classNameAttribute));
String bundleName = Strings.intern(element.getContributor().getName());
if (Strings.isValid(bundleName) && Strings.isValid(className)) {
toReturn.put(name, new Pair<String, String>(bundleName, className));
}
}
}
if (toReturn.isEmpty()) {
throw new OseeStateException(String.format(
"No Objects loaded for [%s] with element names %s and attribute [%s]", extensionPointId,
Arrays.asList(elementNames), classNameAttribute));
}
return toReturn;
}
@Override
public String toString() {
return super.toString();
}
public static Set<String> getAttributeProviders() throws OseeStateException {
if (instance.attributeDataProviderClasses == null) {
instance.attributeDataProviderClasses =
instance.loadExtensions(ATTRIBUTE_DATA_PROVIDER_TYPE, attributeProviderBaseTypes, CLASS_ID);
}
return instance.attributeDataProviderClasses.keySet();
}
public static Set<String> getAttributeClasses() throws OseeStateException {
if (instance.attributeTypeClasses == null) {
instance.attributeTypeClasses = instance.loadExtensions(ATTRIBUTE_TYPE, attributeBaseTypes, CLASS_ID);
}
return instance.attributeTypeClasses.keySet();
}
}
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