org.jboss.marshalling.ClassTable Maven / Gradle / Ivy

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This artifact provides a single jar that contains all classes required to use remote EJB and JMS, including all dependencies. It is intended for use by those not using maven, maven users should just import the EJB and JMS BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up with different versions on classes on the class path).

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/*
 * JBoss, Home of Professional Open Source.
 * Copyright 2014 Red Hat, Inc., and individual contributors
 * as indicated by the @author tags.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.jboss.marshalling;

import java.io.IOException;

/**
 * A lookup mechanism for predefined classes.  Some marshallers can use this to
 * avoid sending lengthy class descriptor information.
 */
public interface ClassTable {
    /**
     * Determine whether the given class reference is a valid predefined reference.
     *
     * @param clazz the candidate class
     * @return the class writer, or {@code null} to use the default mechanism
     * @throws IOException if an I/O error occurs
     */
    Writer getClassWriter(Class clazz) throws IOException;

    /**
     * Read a class from the stream.  The class will have been written by the
     * {@link #getClassWriter(Class)} method's {@code Writer} instance, as defined above.
     *
     * @param unmarshaller the unmarshaller to read from
     * @return the class
     * @throws IOException if an I/O error occurs
     * @throws ClassNotFoundException if a class could not be found
     */
    Class readClass(Unmarshaller unmarshaller) throws IOException, ClassNotFoundException;

    /**
     * The class writer for a specific class.
     * @apiviz.exclude
     */
    interface Writer {
        /**
         * Write the predefined class reference to the stream.
         *
         * @param marshaller the marshaller to write to
         * @param clazz the class reference to write
         * @throws IOException if an I/O error occurs
         */
        void writeClass(Marshaller marshaller, Class clazz) throws IOException;
    }
}