| /** |
| * 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.apex.malhar.lib.utils.serde; |
| |
| import org.apache.hadoop.classification.InterfaceStability; |
| |
| import com.datatorrent.netlet.util.Slice; |
| |
| /** |
| * A utility class which contains static methods for manipulating byte arrays and {@link Slice}s |
| * |
| * @since 3.5.0 |
| */ |
| @InterfaceStability.Evolving |
| public class SliceUtils |
| { |
| private SliceUtils() |
| { |
| } |
| |
| /** |
| * Concatenates two byte arrays. |
| * @param a The first byte array to concatenate. |
| * @param b The second byte array to concatenate. |
| * @return The concatenated byte arrays. |
| */ |
| public static byte[] concatenate(byte[] a, byte[] b) |
| { |
| byte[] output = new byte[a.length + b.length]; |
| |
| System.arraycopy(a, 0, output, 0, a.length); |
| System.arraycopy(b, 0, output, a.length, b.length); |
| return output; |
| } |
| |
| /** |
| * Concatenates two {@link Slice}s |
| * @param a The first {@link Slice} to concatenate. |
| * @param b The second {@link Slice} to concatenate. |
| * @return The concatenated {@link Slice}. |
| */ |
| public static Slice concatenate(Slice a, Slice b) |
| { |
| int size = a.length + b.length; |
| byte[] bytes = new byte[size]; |
| |
| System.arraycopy(a.buffer, a.offset, bytes, 0, a.length); |
| System.arraycopy(b.buffer, b.offset, bytes, a.length, b.length); |
| |
| return new Slice(bytes); |
| } |
| |
| /** |
| * Concatenates a byte array with the contents of a {@link Slice}. |
| * @param a The byte array to concatenate. The contents of the byte array appear first in the concatenation. |
| * @param b The {@link Slice} to concatenate a byte array with. |
| * @return A {@link Slice} whose contents are the concatenation of the input byte array and {@link Slice}. |
| */ |
| public static Slice concatenate(byte[] a, Slice b) |
| { |
| int size = a.length + b.length; |
| byte[] bytes = new byte[size]; |
| |
| System.arraycopy(a, 0, bytes, 0, a.length); |
| System.arraycopy(b.buffer, b.offset, bytes, a.length, b.length); |
| |
| return new Slice(bytes); |
| } |
| |
| /** |
| * Concatenates a byte array with the contents of a {@link Slice}. |
| * @param a The byte array to concatenate. |
| * @param b The {@link Slice} to concatenate a byte array with. The contents of the {@link Slice} appear first in the |
| * concatenation. |
| * @return A {@link Slice} whose contents are the concatenation of the input byte array and {@link Slice}. |
| */ |
| public static Slice concatenate(Slice a, byte[] b) |
| { |
| int size = a.length + b.length; |
| byte[] bytes = new byte[size]; |
| |
| System.arraycopy(a.buffer, a.offset, bytes, 0, a.length); |
| System.arraycopy(b, 0, bytes, a.length, b.length); |
| |
| return new Slice(bytes); |
| } |
| } |