com.facebook.presto.jdbc.internal.io.airlift.slice.Preconditions Maven / Gradle / Ivy

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/*
 * Copyright (C) 2007 The Guava Authors
 *
 * Licensed 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.facebook.presto.jdbc.internal.io.airlift.slice;

import com.facebook.presto.jdbc.internal.javax.annotation.Nullable;

import static java.lang.String.format;

// forked from com.google.common.base.Preconditions
final class Preconditions
{
    private Preconditions()
    {
    }

    public static void checkArgument(boolean expression, String errorMessage)
    {
        if (!expression) {
            throw new IllegalArgumentException(errorMessage);
        }
    }

    public static int checkPositionIndex(int index, int size)
    {
        return checkPositionIndex(index, size, "index");
    }

    public static int checkPositionIndex(int index, int size, @Nullable String desc)
    {
        // Carefully optimized for execution by hotspot (explanatory comment above)
        if (index < 0 || index > size) {
            throw new IndexOutOfBoundsException(badPositionIndex(index, size, desc));
        }
        return index;
    }

    public static long checkPositionIndex(long index, long size)
    {
        return checkPositionIndex(index, size, "index");
    }

    public static long checkPositionIndex(long index, long size, @Nullable String desc)
    {
        // Carefully optimized for execution by hotspot (explanatory comment above)
        if (index < 0 || index > size) {
            throw new IndexOutOfBoundsException(badPositionIndex(index, size, desc));
        }
        return index;
    }

    private static String badPositionIndex(long index, long size, String desc)
    {
        if (index < 0) {
            return format("%s (%s) must not be negative", desc, index);
        }
        else if (size < 0) {
            throw new IllegalArgumentException("negative size: " + size);
        }
        else { // index > size
            return format("%s (%s) must not be greater than size (%s)", desc, index, size);
        }
    }

    public static void checkPositionIndexes(int start, int end, int size)
    {
        // Carefully optimized for execution by hotspot (explanatory comment above)
        if (start < 0 || end < start || end > size) {
            throw new IndexOutOfBoundsException(badPositionIndexes(start, end, size));
        }
    }

    private static String badPositionIndexes(int start, int end, int size)
    {
        if (start < 0 || start > size) {
            return badPositionIndex(start, size, "start index");
        }
        if (end < 0 || end > size) {
            return badPositionIndex(end, size, "end index");
        }
        // end < start
        return format("end index (%s) must not be less than start index (%s)", end, start);
    }

    public static void verify(boolean condition)
    {
        if (!condition) {
            throw new AssertionError();
        }
    }
}