dubbo-serialization/dubbo-serialization-jdk/src/main/java/com/alibaba/dubbo/common/serialize/java/CompactedObjectOutputStream.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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 com.alibaba.dubbo.common.serialize.java;

import java.io.IOException;
import java.io.ObjectOutputStream;
import java.io.ObjectStreamClass;
import java.io.OutputStream;

/**
 * Compacted java object output stream.
 */
public class CompactedObjectOutputStream extends ObjectOutputStream {
    public CompactedObjectOutputStream(OutputStream out) throws IOException {
        super(out);
    }

    @Override
    protected void writeClassDescriptor(ObjectStreamClass desc) throws IOException {
        Class<?> clazz = desc.forClass();
        if (clazz.isPrimitive() || clazz.isArray()) {
            write(0);
            super.writeClassDescriptor(desc);
        } else {
            write(1);
            writeUTF(desc.getName());
        }
    }
}