Java example source code file (CodeModelClassFactory.java)

This example Java source code file (CodeModelClassFactory.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

classtype, codemodelclassfactory, errorreceiver, jclassalreadyexistsexception, jclasscontainer, jdefinedclass, locator, sax, saxparseexception, string

The CodeModelClassFactory.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.util;

import com.sun.codemodel.internal.ClassType;
import com.sun.codemodel.internal.JClassAlreadyExistsException;
import com.sun.codemodel.internal.JClassContainer;
import com.sun.codemodel.internal.JDefinedClass;
import com.sun.codemodel.internal.JJavaName;
import com.sun.codemodel.internal.JMod;
import com.sun.tools.internal.xjc.ErrorReceiver;

import org.xml.sax.Locator;
import org.xml.sax.SAXParseException;

/**
 * Create new {@link JDefinedClass} and report class collision errors,
 * if necessary.
 *
 * This is just a helper class that simplifies the class name collision
 * detection. This object maintains no state, so it is OK to use
 * multiple instances of this.
 *
 * @author
 *     Kohsuke Kawaguchi (kohsuke.kawaguchi@sun.com)
 */
public final class CodeModelClassFactory {

    /** errors are reported to this object. */
    private ErrorReceiver errorReceiver;

    /** unique id generator. */
    private int ticketMaster = 0;


    public CodeModelClassFactory( ErrorReceiver _errorReceiver ) {
        this.errorReceiver = _errorReceiver;
    }

    public JDefinedClass createClass( JClassContainer parent, String name, Locator source ) {
        return createClass( parent, JMod.PUBLIC, name, source );
    }
    public JDefinedClass createClass( JClassContainer parent, int mod, String name, Locator source ) {
        return createClass(parent,mod,name,source,ClassType.CLASS);
    }

    public JDefinedClass createInterface( JClassContainer parent, String name, Locator source ) {
        return createInterface( parent, JMod.PUBLIC, name, source );
    }
    public JDefinedClass createInterface( JClassContainer parent, int mod, String name, Locator source ) {
        return createClass(parent,mod,name,source,ClassType.INTERFACE);
    }
    public JDefinedClass createClass(
        JClassContainer parent, String name, Locator source, ClassType kind ) {
        return createClass(parent,JMod.PUBLIC,name,source,kind);
    }
    public JDefinedClass createClass(
        JClassContainer parent, int mod, String name, Locator source, ClassType kind ) {

        if(!JJavaName.isJavaIdentifier(name)) {
            // report the error
            errorReceiver.error( new SAXParseException(
                Messages.format( Messages.ERR_INVALID_CLASSNAME, name ), source ));
            return createDummyClass(parent);
        }


        try {
            if(parent.isClass() && kind==ClassType.CLASS)
                mod |= JMod.STATIC;

            JDefinedClass r = parent._class(mod,name,kind);
            // use the metadata field to store the source location,
            // so that we can report class name collision errors.
            r.metadata = source;

            return r;
        } catch( JClassAlreadyExistsException e ) {
            // class collision.
            JDefinedClass cls = e.getExistingClass();

            // report the error
            errorReceiver.error( new SAXParseException(
                Messages.format( Messages.ERR_CLASSNAME_COLLISION, cls.fullName() ),
                (Locator)cls.metadata ));
            errorReceiver.error( new SAXParseException(
                Messages.format( Messages.ERR_CLASSNAME_COLLISION_SOURCE, name ),
                source ));

            if( !name.equals(cls.name()) ) {
                // on Windows, FooBar and Foobar causes name collision
                errorReceiver.error( new SAXParseException(
                    Messages.format( Messages.ERR_CASE_SENSITIVITY_COLLISION,
                        name, cls.name() ), null ) );
            }

            if(Util.equals((Locator)cls.metadata,source)) {
                errorReceiver.error( new SAXParseException(
                    Messages.format( Messages.ERR_CHAMELEON_SCHEMA_GONE_WILD ),
                    source ));
            }

            return createDummyClass(parent);
        }
    }

    /**
     * Create a dummy class to recover from an error.
     *
     * We won't generate the code, so the client will never see this class
     * getting generated.
     */
    private JDefinedClass createDummyClass(JClassContainer parent) {
        try {
            return parent._class("$$$garbage$$$"+(ticketMaster++));
        } catch( JClassAlreadyExistsException ee ) {
            return ee.getExistingClass();
        }
    }
}