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Java example source code file (BIContent.java)

This example Java source code file (BIContent.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

bicontent, bielement, classnotfoundexception, dom, element, fieldrenderer, internalerror, jclass, options, string, util

The BIContent.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.reader.dtd.bindinfo;

import java.util.ArrayList;

import com.sun.codemodel.internal.JClass;
import com.sun.tools.internal.xjc.Options;
import com.sun.tools.internal.xjc.generator.bean.field.FieldRenderer;

import org.w3c.dom.Element;

/**
 * Particles in the <content> declaration in the binding file.
 *
 */
public class BIContent
{
    /**
     * Wraps a given particle.
     *
     * <p>
     * This object should be created through
     * the {@link #create(Element, BIElement)} method.
     */
    private BIContent( Element e, BIElement _parent ) {
        this.element = e;
        this.parent = _parent;
        this.opts = parent.parent.model.options;
    }

    /** The particle element which this object is wrapping. */
    protected final Element element;

    /** The parent object.*/
    protected final BIElement parent;

    private final Options opts;

    /**
     * Gets the realization of this particle, if any.
     *
     * @return
     *      null if the "collection" attribute was not specified.
     */
    public final FieldRenderer getRealization() {
        String v = DOMUtil.getAttribute(element,"collection");
        if(v==null)     return null;

        v = v.trim();
        if(v.equals("array"))   return opts.getFieldRendererFactory().getArray();
        if(v.equals("list"))
            return opts.getFieldRendererFactory().getList(
                parent.parent.codeModel.ref(ArrayList.class));

        // the correctness of the attribute value must be
        // checked by the validator.
        throw new InternalError("unexpected collection value: "+v);
    }

    /**
     * Gets the property name of this particle.
     *
     * @return
     *      always a non-null, valid string.
     */
    public final String getPropertyName() {
        String r = DOMUtil.getAttribute(element,"property");

        // in case of <element-ref>, @property is optional and
        // defaults to @name.
        // in all other cases, @property is mandatory.
        if(r!=null)     return r;
        return DOMUtil.getAttribute(element,"name");
    }

    /**
     * Gets the type of this property, if any.
     * <p>
     * <element-ref> particle doesn't have the type.
     *
     * @return
     *      null if none is specified.
     */
    public final JClass getType() {
        try {
            String type = DOMUtil.getAttribute(element,"supertype");
            if(type==null)     return null;

            // TODO: does this attribute defaults to the current package?
            int idx = type.lastIndexOf('.');
            if(idx<0)   return parent.parent.codeModel.ref(type);
            else        return parent.parent.getTargetPackage().ref(type);
        } catch( ClassNotFoundException e ) {
            // TODO: better error handling
            throw new NoClassDefFoundError(e.getMessage());
        }
    }





    /**
     * Creates an appropriate subclass of BIContent
     * by sniffing the tag name.
     * <p>
     * This method should be only called by the BIElement class.
     */
    static BIContent create( Element e, BIElement _parent ) {
        return new BIContent(e,_parent);
    }


}

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