CountingDataOutputStream.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 org.apache.doris.common.io;

import java.io.DataOutputStream;
import java.io.FilterOutputStream;
import java.io.IOException;
import java.io.OutputStream;

/**
 * This class adds a long type counter for DataOutputStream to
 * count the bytes written to the data output stream so far.
 */

public class CountingDataOutputStream extends DataOutputStream {

    public CountingDataOutputStream(OutputStream out) {
        super(new CountingOutputStream(out, 0L));
    }

    public CountingDataOutputStream(OutputStream out, long count) {
        super(new CountingOutputStream(out, count));
    }

    public long getCount() {
        return ((CountingOutputStream) this.out).getCount();
    }

    public void close() throws IOException {
        this.out.close();
    }

    public static class CountingOutputStream extends FilterOutputStream {
        private long count;

        public CountingOutputStream(OutputStream out, long count) {
            super(out);
            this.count = count;
        }

        public long getCount() {
            return this.count;
        }

        public void write(byte[] b, int off, int len) throws IOException {
            this.out.write(b, off, len);
            this.count += len;
        }

        public void write(int b) throws IOException {
            this.out.write(b);
            ++this.count;
        }

        public void close() throws IOException {
            this.out.close();
        }
    }
}