Java example source code file (ElementAdapter.java)

This example Java source code file (ElementAdapter.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

celementinfo, classoutline, cpropertyinfo, elementadapter, fieldaccessorimpl, fieldoutline, jcodemodel, jexpression, jinvocation

The ElementAdapter.java Java example source code

/*
 * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

package com.sun.tools.internal.xjc.api.impl.s2j;

import javax.xml.bind.JAXBElement;
import javax.xml.namespace.QName;

import com.sun.tools.internal.xjc.outline.FieldOutline;
import com.sun.tools.internal.xjc.outline.ClassOutline;
import com.sun.tools.internal.xjc.outline.FieldAccessor;
import com.sun.tools.internal.xjc.outline.Aspect;
import com.sun.tools.internal.xjc.outline.Outline;
import com.sun.tools.internal.xjc.model.CPropertyInfo;
import com.sun.tools.internal.xjc.model.CElementInfo;
import com.sun.tools.internal.xjc.model.CReferencePropertyInfo;
import com.sun.codemodel.internal.JType;
import com.sun.codemodel.internal.JExpression;
import com.sun.codemodel.internal.JBlock;
import com.sun.codemodel.internal.JVar;
import com.sun.codemodel.internal.JConditional;
import com.sun.codemodel.internal.JExpr;
import com.sun.codemodel.internal.JCodeModel;
import com.sun.codemodel.internal.JInvocation;

/**
 * {@link FieldOutline} that wraps another {@link FieldOutline}
 * and allows JAX-WS to access values without using about
 * {@link JAXBElement}.
 *
 * <p>
 * That means if a value is requested, we unwrap JAXBElement
 * and give it to them. If a value is set, we wrap that into
 * JAXBElement, etc.
 *
 * <p>
 * This can be used only with {@link CReferencePropertyInfo}
 * (or else it won't be {@link JAXBElement),
 * with one {@link CElementInfo} (or else we can't infer the tag name.)
 *
 * @author Kohsuke Kawaguchi
 */
abstract class ElementAdapter implements FieldOutline {
    protected final FieldOutline core;

    /**
     * The only one {@link CElementInfo} that can be in the property.
     */
    protected final CElementInfo ei;

    public ElementAdapter(FieldOutline core, CElementInfo ei) {
        this.core = core;
        this.ei = ei;
    }

    public ClassOutline parent() {
        return core.parent();
    }

    public CPropertyInfo getPropertyInfo() {
        return core.getPropertyInfo();
    }

    protected final Outline outline() {
        return core.parent().parent();
    }

    protected final JCodeModel codeModel() {
        return outline().getCodeModel();
    }

    protected abstract class FieldAccessorImpl implements FieldAccessor {
        final FieldAccessor acc;

        public FieldAccessorImpl(JExpression target) {
            acc = core.create(target);
        }

        public void unsetValues(JBlock body) {
            acc.unsetValues(body);
        }

        public JExpression hasSetValue() {
            return acc.hasSetValue();
        }

        public FieldOutline owner() {
            return ElementAdapter.this;
        }

        public CPropertyInfo getPropertyInfo() {
            return core.getPropertyInfo();
        }

        /**
         * Wraps a type value into a {@link JAXBElement}.
         */
        protected final JInvocation createJAXBElement(JExpression $var) {
            JCodeModel cm = codeModel();

            return JExpr._new(cm.ref(JAXBElement.class))
                .arg(JExpr._new(cm.ref(QName.class))
                    .arg(ei.getElementName().getNamespaceURI())
                    .arg(ei.getElementName().getLocalPart()))
                .arg(getRawType().boxify().erasure().dotclass())
                .arg($var);
        }
    }
}