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/*
* Copyright 2014 Open Networking Laboratory
*
* 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 org.onlab.util;
import java.util.Arrays;
import com.google.common.base.MoreObjects;
import com.google.common.base.MoreObjects.ToStringHelper;
/**
* Helper to print byte[] length and hashCode.
*/
public final class ByteArraySizeHashPrinter {
private final byte[] bytes;
/**
* Returns ByteArraySizeHashPrinter wrapping given byte[].
*
* @param bytes bytes to wrap around
* @return ByteArraySizeHashPrinter
*/
public static ByteArraySizeHashPrinter of(byte[] bytes) {
return new ByteArraySizeHashPrinter(bytes);
}
/**
* Returns ByteArraySizeHashPrinter wrapping given byte[].
*
* @param bytes bytes to wrap around
* @return null if {@code bytes == null}, ByteArraySizeHashPrinter otherwise
*/
public static ByteArraySizeHashPrinter orNull(byte[] bytes) {
if (bytes == null) {
return null;
}
return new ByteArraySizeHashPrinter(bytes);
}
public ByteArraySizeHashPrinter(byte[] bytes) {
this.bytes = bytes;
}
@Override
public String toString() {
ToStringHelper helper = MoreObjects.toStringHelper("byte[]");
if (bytes != null) {
helper.add("length", bytes.length)
.add("hash", Arrays.hashCode(bytes));
} else {
helper.addValue(bytes);
}
return helper.toString();
}
}
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