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EE4J Compatible Implementation for Jakarta Faces API

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/*
 * 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 java.lang.reflect.Field;
import java.lang.reflect.Method;
import javax.faces.context.FacesContext;
import javax.persistence.PersistenceUnit;

/**
 * {@link RuntimeAnnotationHandler} responsible for processing
 * {@link PersistenceUnit} annotations.
 */
class PersistenceUnitHandler extends JndiHandler implements RuntimeAnnotationHandler {

    private Method[] methods;
    private PersistenceUnit[] methodAnnotations;
    private Field[] fields;
    private PersistenceUnit[] fieldAnnotations;

    public PersistenceUnitHandler(
            Method[] methods, PersistenceUnit[] methodAnnotations,
            Field[] fields, PersistenceUnit[] fieldAnnotations) {
        this.methods = methods;
        this.methodAnnotations = methodAnnotations;
        this.fields = fields;
        this.fieldAnnotations = fieldAnnotations;
    }

    @SuppressWarnings({"UnusedDeclaration"})
    @Override
    public void apply(FacesContext ctx, Object... params) {
        Object object = params[0];
        for (int i = 0; i < fields.length; i++) {
            applyToField(ctx, fields[i], fieldAnnotations[i], object);
        }
        
        for (int i=0; i