com.sun.faces.application.annotation.PersistenceContextScanner Maven / Gradle / Ivy
/*
* Copyright (c) 1997, 2018 Oracle and/or its affiliates. All rights reserved.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v. 2.0, which is available at
* http://www.eclipse.org/legal/epl-2.0.
*
* This Source Code may also be made available under the following Secondary
* Licenses when the conditions for such availability set forth in the
* Eclipse Public License v. 2.0 are satisfied: GNU General Public License,
* version 2 with the GNU Classpath Exception, which is available at
* https://www.gnu.org/software/classpath/license.html.
*
* SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
*/
package com.sun.faces.application.annotation;
import com.sun.faces.util.Util;
import java.lang.annotation.Annotation;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.util.ArrayList;
import javax.persistence.PersistenceContext;
/**
* Scanner
implementation responsible for {@link PersistenceContext} annotations.
*/
class PersistenceContextScanner implements Scanner {
/**
* Get the annotation we handle.
*
* @return the annotation we handle.
*/
@Override
public Class getAnnotation() {
return PersistenceContext.class;
}
/**
* Scan the specified class for the given annotation.
*
* @param clazz the class.
* @return the runtime annotation handler.
* @todo Make sure we get all the fields, handle method and class based injection, handle PersistenceContexts.
*/
@Override
public RuntimeAnnotationHandler scan(Class clazz) {
Util.notNull("clazz", clazz);
PersistenceContextHandler handler = null;
ArrayList fieldAnnotations = new ArrayList<>();
ArrayList fields = new ArrayList<>();
for (Field field : clazz.getDeclaredFields()) {
PersistenceContext fieldAnnotation = field.getAnnotation(PersistenceContext.class);
if (fieldAnnotation != null) {
fieldAnnotations.add(fieldAnnotation);
fields.add(field);
}
}
ArrayList methodAnnotations = new ArrayList<>();
ArrayList methods = new ArrayList<>();
for (Method method : clazz.getDeclaredMethods()) {
PersistenceContext methodAnnotation = method.getAnnotation(PersistenceContext.class);
if (methodAnnotation != null) {
methodAnnotations.add(methodAnnotation);
methods.add(method);
}
}
if (!fieldAnnotations.isEmpty() || !methodAnnotations.isEmpty()) {
handler = new PersistenceContextHandler(
methods.toArray(new Method[0]), methodAnnotations.toArray(new PersistenceContext[0]),
fields.toArray(new Field[0]), fieldAnnotations.toArray(new PersistenceContext[0]));
}
return handler;
}
}