org.jboss.marshalling.AbstractObjectInput Maven / Gradle / Ivy
Go to download
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).
/*
* 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;
import java.io.InvalidObjectException;
import java.io.ObjectInput;
/**
* An abstract object input implementation.
*/
public abstract class AbstractObjectInput extends SimpleDataInput implements ObjectInput {
/**
* Construct a new instance.
*
* @param bufferSize the buffer size to use
*/
protected AbstractObjectInput(int bufferSize) {
super(bufferSize);
}
/** {@inheritDoc} */
public final Object readObject() throws ClassNotFoundException, IOException {
return doReadObject(false);
}
/**
* Read and return an unshared object.
*
* @return an unshared object
* @throws ClassNotFoundException if the class of a serialized object cannot be found
* @throws IOException if an error occurs
*/
public final Object readObjectUnshared() throws ClassNotFoundException, IOException {
return doReadObject(true);
}
/**
* Implementation of the actual object-reading method.
*
* @param unshared {@code true} if the instance should be unshared, {@code false} if it is shared
* @return the object to read
* @throws ClassNotFoundException if the class for the object could not be loaded
* @throws IOException if an I/O error occurs
*/
protected abstract Object doReadObject(boolean unshared) throws ClassNotFoundException, IOException;
/**
* Read and return an object, cast to a specific type.
*
* @param type the object class
* @param the object type
* @return the object read from the stream
* @throws ClassNotFoundException if the class of a serialized object cannot be found
* @throws InvalidObjectException if the object is not of the expected type
* @throws IOException if an error occurs
*/
public T readObject(final Class type) throws ClassNotFoundException, IOException {
final Object obj = doReadObject(false);
try {
return type.cast(obj);
} catch (ClassCastException e) {
throw wrongType(e, type, obj.getClass());
}
}
/**
* Read and return an unshared object, cast to a specific type.
*
* @param type the object class
* @param the object type
* @return an unshared object
* @throws ClassNotFoundException if the class of a serialized object cannot be found
* @throws InvalidObjectException if the object is not of the expected type
* @throws IOException if an error occurs
*/
public T readObjectUnshared(final Class type) throws ClassNotFoundException, IOException {
final Object obj = doReadObject(true);
try {
return type.cast(obj);
} catch (ClassCastException e) {
throw wrongType(e, type, obj.getClass());
}
}
private static InvalidObjectException wrongType(final ClassCastException e, final Class expected, final Class actual) {
final InvalidObjectException ioe = new InvalidObjectException("Object is of the wrong type (expected " + expected + ", got " + actual + ")");
ioe.initCause(e);
return ioe;
}
}