| /* |
| * 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.qpid.protonj2.types.messaging; |
| |
| import org.apache.qpid.protonj2.buffer.ProtonBuffer; |
| import org.apache.qpid.protonj2.buffer.ProtonByteBufferAllocator; |
| import org.apache.qpid.protonj2.types.Binary; |
| import org.apache.qpid.protonj2.types.Symbol; |
| import org.apache.qpid.protonj2.types.UnsignedLong; |
| |
| public final class Data implements Section<byte[]> { |
| |
| public static final UnsignedLong DESCRIPTOR_CODE = UnsignedLong.valueOf(0x0000000000000075L); |
| public static final Symbol DESCRIPTOR_SYMBOL = Symbol.valueOf("amqp:data:binary"); |
| |
| private final ProtonBuffer buffer; |
| |
| private Binary cachedBinary; |
| |
| public Data(Binary binary) { |
| this.buffer = binary != null ? binary.asProtonBuffer() : null; |
| this.cachedBinary = binary; |
| } |
| |
| public Data(ProtonBuffer buffer) { |
| this.buffer = buffer; |
| } |
| |
| public Data(byte[] value) { |
| this.buffer = value != null ? ProtonByteBufferAllocator.DEFAULT.wrap(value) : null; |
| } |
| |
| public Data(byte[] value, int offset, int length) { |
| this.buffer = value != null ? ProtonByteBufferAllocator.DEFAULT.wrap(value, offset, length) : null; |
| } |
| |
| public Data copy() { |
| return new Data(buffer == null ? null : buffer.copy()); |
| } |
| |
| public Binary getBinary() { |
| if (cachedBinary != null || buffer == null) { |
| return cachedBinary; |
| } else { |
| return cachedBinary = new Binary(buffer); |
| } |
| } |
| |
| /** |
| * Returns the {@link ProtonBuffer} that contains the bytes carried in the {@link Data} section. |
| * If the section carries no bytes then this method returns null. This method allows the {@link Data} |
| * section to be considered a carrier of {@link ProtonBuffer} types instead of the {@link Binary} |
| * value it will encode as part of its body and avoids creation of a Binary object when one is not |
| * needed. If a Binary instance is required then calling the {@link #getBinary()} method will create |
| * an instance that wraps the internal {@link ProtonBuffer}. |
| * |
| * @return the {@link ProtonBuffer} that back this Data section. |
| */ |
| public ProtonBuffer getBuffer() { |
| return buffer; |
| } |
| |
| /** |
| * Returns the backing array for this Data {@link Section} copying the contents into a new array |
| * instance if the backing array in the contained Binary is a subsequence of a larger referenced |
| * array instance. |
| * |
| * @return the byte array view of this Data {@link Section} {@link Binary} payload. |
| */ |
| @Override |
| public byte[] getValue() { |
| if (buffer != null && buffer.hasArray() && buffer.getArrayOffset() == 0 && buffer.getReadableBytes() == buffer.getArray().length) { |
| return buffer.getArray(); |
| } else { |
| byte[] dataCopy = null; |
| if (buffer != null) { |
| dataCopy = new byte[buffer.getReadableBytes()]; |
| buffer.getBytes(buffer.getReadIndex(), dataCopy); |
| } |
| |
| return dataCopy; |
| } |
| } |
| |
| @Override |
| public String toString() { |
| if (buffer == null) { |
| return ""; |
| } |
| |
| StringBuilder str = new StringBuilder(); |
| |
| str.append("Data{ "); |
| |
| for (int i = 0; i < buffer.getReadableBytes(); i++) { |
| byte c = buffer.getByte(i); |
| |
| if (c > 31 && c < 127 && c != '\\') { |
| str.append((char) c); |
| } else { |
| str.append(String.format("\\x%02x", c)); |
| } |
| } |
| |
| str.append(" }"); |
| |
| return str.toString(); |
| } |
| |
| @Override |
| public SectionType getType() { |
| return SectionType.Data; |
| } |
| |
| @Override |
| public int hashCode() { |
| final int prime = 31; |
| int result = 1; |
| result = prime * result + ((buffer == null) ? 0 : buffer.hashCode()); |
| return result; |
| } |
| |
| @Override |
| public boolean equals(Object obj) { |
| if (this == obj) { |
| return true; |
| } |
| if (obj == null) { |
| return false; |
| } |
| if (getClass() != obj.getClass()) { |
| return false; |
| } |
| |
| Data other = (Data) obj; |
| if (buffer == null) { |
| return other.buffer == null; |
| } |
| |
| return buffer.equals(other.buffer); |
| } |
| } |