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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.airlift.slice;
import javax.annotation.Nullable;
// forked from com.facebook.presto.jdbc.internal.guava.base.Preconditions
final class Preconditions
{
private Preconditions()
{
}
public static T checkNotNull(T reference, String errorMessage)
{
if (reference == null) {
throw new NullPointerException(errorMessage);
}
return reference;
}
public static void checkArgument(boolean expression, String errorMessage)
{
if (!expression) {
throw new IllegalArgumentException(errorMessage);
}
}
public static void checkArgument(boolean expression, @Nullable String errorMessageTemplate, @Nullable Object... errorMessageArgs)
{
if (!expression) {
throw new IllegalArgumentException(format(errorMessageTemplate, errorMessageArgs));
}
}
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;
}
private static String badPositionIndex(int index, int 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);
}
private static String format(String template, @Nullable Object... args)
{
template = String.valueOf(template); // null -> "null"
// start substituting the arguments into the '%s' placeholders
StringBuilder builder = new StringBuilder(template.length() + 16 * args.length);
int templateStart = 0;
int i = 0;
while (i < args.length) {
int placeholderStart = template.indexOf("%s", templateStart);
if (placeholderStart == -1) {
break;
}
builder.append(template.substring(templateStart, placeholderStart));
builder.append(args[i++]);
templateStart = placeholderStart + 2;
}
builder.append(template.substring(templateStart));
// if we run out of placeholders, append the extra args in square braces
if (i < args.length) {
builder.append(" [");
builder.append(args[i++]);
while (i < args.length) {
builder.append(", ");
builder.append(args[i++]);
}
builder.append(']');
}
return builder.toString();
}
}
