ActiveMQ example source code file (ByteArrayInputStream.java)

This example ActiveMQ source code file (ByteArrayInputStream.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - ActiveMQ tags/keywords

bytearrayinputstream, bytearrayinputstream, inputstream, inputstream, io, ioexception, ioexception

The ActiveMQ ByteArrayInputStream.java source code

/**
 * 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.kahadb.util;

import java.io.IOException;
import java.io.InputStream;

/**
 * Very similar to the java.io.ByteArrayInputStream but this version is not
 * thread safe.
 */
public class ByteArrayInputStream extends InputStream {

    byte buffer[];
    int limit;
    int pos;
    int mark;

    public ByteArrayInputStream(byte data[]) {
        this(data, 0, data.length);
    }

    public ByteArrayInputStream(ByteSequence sequence) {
        this(sequence.getData(), sequence.getOffset(), sequence.getLength());
    }

    public ByteArrayInputStream(byte data[], int offset, int size) {
        this.buffer = data;
        this.mark = offset;
        this.pos = offset;
        this.limit = offset + size;
    }

    public int read() throws IOException {
        if (pos < limit) {
            return buffer[pos++] & 0xff;
        } else {
            return -1;
        }
    }

    public int read(byte[] b) throws IOException {
        return read(b, 0, b.length);
    }

    public int read(byte b[], int off, int len) {
        if (pos < limit) {
            len = Math.min(len, limit - pos);
            if (len > 0) {
                System.arraycopy(buffer, pos, b, off, len);
                pos += len;
            }
            return len;
        } else {
            return -1;
        }
    }

    public long skip(long len) throws IOException {
        if (pos < limit) {
            len = Math.min(len, limit - pos);
            if (len > 0) {
                pos += len;
            }
            return len;
        } else {
            return -1;
        }
    }

    public int available() {
        return limit - pos;
    }

    public boolean markSupported() {
        return true;
    }

    public void mark(int markpos) {
        mark = pos;
    }

    public void reset() {
        pos = mark;
    }
}