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/*******************************************************************************
* Copyright (c) 2010 IBM Corporation and others.
* 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:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.e4.core.internal.di;
import java.lang.reflect.Field;
import javax.inject.Named;
import org.eclipse.e4.core.di.IInjector;
import org.eclipse.e4.core.di.InjectionException;
import org.eclipse.e4.core.di.annotations.Optional;
import org.eclipse.e4.core.di.suppliers.IObjectDescriptor;
import org.eclipse.e4.core.di.suppliers.PrimaryObjectSupplier;
/**
* This requestor is used to establish a link between the object supplier
* and the injected object. This pseudo-link is useful is no regular links
* were created during injection (say, only constructor injection was used)
* but the injected object needs to be notified on the supplier's disposal.
*/
public class ClassRequestor extends Requestor {
@Optional
@Named("e4.internal.injectionLink")
final static public String pseudoVariable = null;
final private String clazzName;
public ClassRequestor(Class<?> clazz, IInjector injector, PrimaryObjectSupplier primarySupplier, PrimaryObjectSupplier tempSupplier, Object requestingObject, boolean track) {
super(null, injector, primarySupplier, tempSupplier, requestingObject, track);
clazzName = (clazz == null) ? null : clazz.getSimpleName();
}
public Object execute() throws InjectionException {
clearResolvedArgs();
return null;
}
@Override
public IObjectDescriptor[] calcDependentObjects() {
Field field = null;
try {
field = ClassRequestor.class.getField("pseudoVariable"); //$NON-NLS-1$
} catch (SecurityException e) {
e.printStackTrace(); // tested - not going to happen
return null;
} catch (NoSuchFieldException e) {
e.printStackTrace(); // tested - not going to happen
return null;
}
return new IObjectDescriptor[] {new ObjectDescriptor(field.getGenericType(), field.getAnnotations())};
}
@Override
public String toString() {
StringBuffer tmp = new StringBuffer();
if (clazzName != null)
tmp.append(clazzName);
tmp.append('.');
tmp.append(pseudoVariable);
return tmp.toString();
}
}
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