Java Boolean From toBooleans(byte[] bytes)

Description

to Booleans

License

Apache License

Declaration

public static boolean[] toBooleans(byte[] bytes) 

Method Source Code

//package com.java2s;
/** I re-ported the (slightly modified) HBase's Bytes code here
 * to avoid dependencies on HBase in the common package of DML.
 * The copyright is included./*  www  .  ja  v  a2 s .  co  m*/
 *
 *
 * Copyright 2010 The Apache Software Foundation
 *
 * 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.
 */

public class Main {
    /** I re-ported the (slightly modified) HBase's Bytes code here
     * to avoid dependencies on HBase in the common package of DML.
     * The copyright is included.
     *
     *
     * Copyright 2010 The Apache Software Foundation
     *
     * 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.
     */

    public static final int SIZEOF_INT = Integer.SIZE / Byte.SIZE;

    public static boolean[] toBooleans(byte[] bytes) {
        int size = toInt(bytes, 0);
        boolean[] result = new boolean[size];
        for (int i = 0; i < size; i++) {
            result[i] = toBoolean(bytes, i + SIZEOF_INT);
        }
        return result;
    }

    private static int toInt(byte[] bytes, int offset) {
        if (offset + SIZEOF_INT > bytes.length) {
            throw new RuntimeException("Cannot decode int from the buffer");
        }
        int n = 0;
        for (int i = offset; i < (offset + SIZEOF_INT); i++) {
            n <<= 8;
            n ^= bytes[i] & 0xFF;
        }
        return n;
    }

    private static boolean toBoolean(byte[] bytes, int offset) {
        if (offset >= bytes.length) {
            throw new RuntimeException("Cannot decode boolean from the buffer");
        }
        return bytes[offset] != (byte) 0;
    }
}

Related

1. toBooleanObject(final int val)
2. toBooleanObject(final String str)
3. toBooleanObject(int value, int trueValue, int falseValue, int nullValue)
4. toBooleanObject(int value, int trueValue, int falseValue, int nullValue)
5. toBooleanObject(String str)
6. toBooleans(byte[] value, int offset, int num)
7. toBooleanString(long value)
8. toBooleanTrue(String str)
9. toBooleanValue(final Object o)