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/**
* 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 Guyomar (Mia-Software) - Bug 334615 - Java Query for EMF Facet
*/
package org.eclipse.emf.facet.query.java.core.internal.evaluator;
import org.eclipse.emf.ecore.EClass;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.facet.efacet.Query;
import org.eclipse.emf.facet.efacet.core.exception.QueryException;
import org.eclipse.emf.facet.efacet.core.exception.QueryExecutionException;
import org.eclipse.emf.facet.efacet.core.query.IQueryEvaluator;
import org.eclipse.emf.facet.efacet.core.query.IQueryEvaluatorFactory;
import org.eclipse.emf.facet.query.java.core.IJavaQuery;
import org.eclipse.emf.facet.query.java.core.internal.plugin.Activator;
import org.eclipse.emf.facet.query.java.javaquery.JavaQuery;
import org.eclipse.emf.facet.query.java.javaquery.JavaqueryPackage;
import org.eclipse.emf.facet.util.core.Logger;
import org.osgi.framework.Bundle;
@Deprecated
public class JavaQueryEvaluatorFactory implements IQueryEvaluatorFactory {
public IQueryEvaluator create(final Query query, final Bundle bundle)
throws QueryException {
if (!(query instanceof JavaQuery)) {
throw new QueryException("Wrong kind of Query: " //$NON-NLS-1$
+ query.getClass().getSimpleName() + " found, " //$NON-NLS-1$
+ JavaQuery.class.getSimpleName() + " expected."); //$NON-NLS-1$
}
if (bundle == null) {
throw new QueryException("Query: " //$NON-NLS-1$
+ query.getClass().getSimpleName()
+ " should be create with a bundle."); //$NON-NLS-1$
}
JavaQueryEvaluator javaQueryEvaluator = null;
try {
JavaQuery javaQuery = (JavaQuery) query;
String className = javaQuery.getImplementationClassName();
if (className == null || className.length() == 0) {
throw new QueryExecutionException(
"implementationClassName is empty"); //$NON-NLS-1$
}
Class<?> javaQueryClass = bundle.loadClass(className);
if (!IJavaQuery.class.isAssignableFrom(javaQueryClass)) {
throw new Exception(className + " does not implement " //$NON-NLS-1$
+ IJavaQuery.class.getSimpleName() + "."); //$NON-NLS-1$
}
javaQueryEvaluator = createJavaQueryImpl(javaQuery,
javaQueryClass);
// Initially a null test was perform on bundle to determine whether
// to check the result type. Now we need a bundle so
// checkResultType=true
javaQueryEvaluator.setCheckResultType(true);
} catch (Exception e) {
QueryException queryException = new QueryException(
"Failed to load the java query:" //$NON-NLS-1$
+ query.getName(), e);
Logger.logError(queryException, Activator.getDefault());
throw queryException;
}
return javaQueryEvaluator;
}
/** This methods is dedicated to isolate the "Unchecked cast" warning. */
@SuppressWarnings("unchecked")
private static JavaQueryEvaluator createJavaQueryImpl(
final JavaQuery javaQuery, final Class<?> javaQueryClass)
throws InstantiationException, IllegalAccessException {
IJavaQuery<EObject, ?> javaQueryInst;
javaQueryInst = (IJavaQuery<EObject, ?>) javaQueryClass
.newInstance();
JavaQueryEvaluator javaQueryEvaluator = new JavaQueryEvaluator(javaQuery,
javaQueryInst);
return javaQueryEvaluator;
}
public EClass getManagedQueryType() {
return JavaqueryPackage.eINSTANCE.getJavaQuery();
}
}
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