modules/nio/src/main/java/common/org/apache/harmony/nio/Util.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.harmony.nio;

import org.apache.harmony.nio.internal.nls.Messages;

/*
 * Static methods. Used by io and nio packages.
 * 
 */
public final class Util {

    // -------------------------------------------------------------------
    // Constructor
    // -------------------------------------------------------------------

    /*
     * No instance.
     */
    private Util() {
        super();
    }

    // -------------------------------------------------------------------
    // Routine methods.
    // -------------------------------------------------------------------

    /*
     * Check array bounds method for methods like doSomething(Object[], offset,
     * length). Exception throws order is IndexOutOfBoundsException for negative
     * index, NullPointerException for null array, IndexOutOfBoundsException for
     * offset+length > array.length
     */
    public static void assertArrayIndex(Object[] array, int offset, int length) {
        if (offset < 0 || length < 0) {
            // nio.05=Negative index specified
            throw new IndexOutOfBoundsException(Messages.getString("nio.05")); //$NON-NLS-1$
        }
        if ((long) offset + (long) length > array.length) {
            // nio.04=Size mismatch
            throw new IndexOutOfBoundsException(Messages.getString("nio.04")); //$NON-NLS-1$
        }
    }

    public static void assertArrayIndex(boolean[] array, int offset, int length) {
        if (offset < 0 || length < 0) {
            // nio.05=Negative index specified
            throw new IndexOutOfBoundsException(Messages.getString("nio.05")); //$NON-NLS-1$
        }
        if ((long) offset + (long) length > array.length) {
            // nio.04=Size mismatch
            throw new IndexOutOfBoundsException(Messages.getString("nio.04")); //$NON-NLS-1$
        }
    }

    public static void assertArrayIndex(byte[] array, int offset, int length) {
        if (offset < 0 || length < 0) {
            // nio.05=Negative index specified
            throw new IndexOutOfBoundsException(Messages.getString("nio.05")); //$NON-NLS-1$
        }
        if ((long) offset + (long) length > array.length) {
            // nio.04=Size mismatch
            throw new IndexOutOfBoundsException(Messages.getString("nio.04")); //$NON-NLS-1$
        }
    }

    public static void assertArrayIndex(short[] array, int offset, int length) {
        if (offset < 0 || length < 0) {
            // nio.05=Negative index specified
            throw new IndexOutOfBoundsException(Messages.getString("nio.05")); //$NON-NLS-1$
        }
        if ((long) offset + (long) length > array.length) {
            // nio.04=Size mismatch
            throw new IndexOutOfBoundsException(Messages.getString("nio.04")); //$NON-NLS-1$
        }
    }

    public static void assertArrayIndex(int[] array, int offset, int length) {
        if (offset < 0 || length < 0) {
            // nio.05=Negative index specified
            throw new IndexOutOfBoundsException(Messages.getString("nio.05")); //$NON-NLS-1$
        }
        if ((long) offset + (long) length > array.length) {
            // nio.04=Size mismatch
            throw new IndexOutOfBoundsException(Messages.getString("nio.04")); //$NON-NLS-1$
        }
    }

    public static void assertArrayIndex(long[] array, int offset, int length) {
        if (offset < 0 || length < 0) {
            // nio.05=Negative index specified
            throw new IndexOutOfBoundsException(Messages.getString("nio.05")); //$NON-NLS-1$
        }
        if ((long) offset + (long) length > array.length) {
            // nio.04=Size mismatch
            throw new IndexOutOfBoundsException(Messages.getString("nio.04")); //$NON-NLS-1$
        }
    }

    public static void assertArrayIndex(float[] array, int offset, int length) {
        if (offset < 0 || length < 0) {
            // nio.05=Negative index specified
            throw new IndexOutOfBoundsException(Messages.getString("nio.05")); //$NON-NLS-1$
        }
        if ((long) offset + (long) length > array.length) {
            // nio.04=Size mismatch
            throw new IndexOutOfBoundsException(Messages.getString("nio.04")); //$NON-NLS-1$
        }
    }

    public static void assertArrayIndex(double[] array, int offset, int length) {
        if (offset < 0 || length < 0) {
            // nio.05=Negative index specified
            throw new IndexOutOfBoundsException(Messages.getString("nio.05")); //$NON-NLS-1$
        }
        if ((long) offset + (long) length > array.length) {
            // nio.04=Size mismatch
            throw new IndexOutOfBoundsException(Messages.getString("nio.04")); //$NON-NLS-1$
        }
    }

    public static void assertArrayIndex(char[] array, int offset, int length) {
        if (offset < 0 || length < 0) {
            // nio.05=Negative index specified
            throw new IndexOutOfBoundsException(Messages.getString("nio.05")); //$NON-NLS-1$
        }
        if ((long) offset + (long) length > array.length) {
            // nio.04=Size mismatch
            throw new IndexOutOfBoundsException(Messages.getString("nio.04")); //$NON-NLS-1$
        }
    }

    /*
     * Check array bounds method for methods like doSomething(Object[], offset,
     * length). Exception throws order is IndexOutOfBoundsException for negative
     * index, IndexOutOfBoundsException for offset+length > array.length
     */
    public static void assertArrayIndex(int arrayLength, int offset, int length) {
        if (offset < 0 || length < 0) {
            // nio.05=Negative index specified
            throw new IndexOutOfBoundsException(Messages.getString("nio.05")); //$NON-NLS-1$
        }
        if ((long) offset + (long) length > arrayLength) {
            // nio.04=Size mismatch
            throw new IndexOutOfBoundsException(Messages.getString("nio.04")); //$NON-NLS-1$
        }
    }
}