| /* |
| * 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.ignite.internal.schema; |
| |
| import java.io.IOException; |
| import java.io.OutputStream; |
| import java.nio.ByteBuffer; |
| import java.nio.ByteOrder; |
| import java.nio.channels.Channels; |
| import java.nio.channels.WritableByteChannel; |
| |
| /** |
| * Heap byte buffer-based row. |
| */ |
| public class ByteBufferRow implements BinaryRow { |
| public static ByteOrder ORDER = ByteOrder.LITTLE_ENDIAN; |
| |
| /** Row buffer. */ |
| private final ByteBuffer buf; |
| |
| /** |
| * Constructor. |
| * |
| * @param data Array representation of the row. |
| */ |
| public ByteBufferRow(byte[] data) { |
| this(ByteBuffer.wrap(data).order(ORDER)); |
| } |
| |
| /** |
| * Constructor. |
| * |
| * @param buf Buffer representing the row. |
| */ |
| public ByteBufferRow(ByteBuffer buf) { |
| assert buf.order() == ORDER; |
| assert buf.position() == 0; |
| |
| this.buf = buf; |
| } |
| |
| /** {@inheritDoc} */ |
| @Override |
| public int schemaVersion() { |
| return Short.toUnsignedInt(buf.getShort(SCHEMA_VERSION_OFFSET)); |
| } |
| |
| /** {@inheritDoc} */ |
| @Override |
| public boolean hasValue() { |
| short schemaVer = buf.getShort(SCHEMA_VERSION_OFFSET); |
| |
| return schemaVer > 0; |
| } |
| |
| /** {@inheritDoc} */ |
| @Override |
| public int hash() { |
| return buf.getInt(KEY_HASH_FIELD_OFFSET); |
| } |
| |
| /** {@inheritDoc} */ |
| @Override |
| public void writeTo(OutputStream stream) throws IOException { |
| WritableByteChannel channel = Channels.newChannel(stream); |
| |
| channel.write(buf); |
| |
| buf.rewind(); |
| } |
| |
| /** {@inheritDoc} */ |
| @Override |
| public ByteBuffer keySlice() { |
| int off = KEY_CHUNK_OFFSET; |
| int len = buf.getInt(off); |
| int limit = buf.limit(); |
| |
| try { |
| return buf.limit(off + len).position(off).slice().order(ORDER); |
| } finally { |
| buf.position(0); // Reset bounds. |
| buf.limit(limit); |
| } |
| } |
| |
| /** {@inheritDoc} */ |
| @Override |
| public ByteBuffer valueSlice() { |
| int off = KEY_CHUNK_OFFSET + buf.getInt(KEY_CHUNK_OFFSET); |
| int len = hasValue() ? buf.getInt(off) : 0; |
| int limit = buf.limit(); |
| |
| try { |
| return buf.limit(off + len).position(off).slice().order(ORDER); |
| } finally { |
| buf.position(0); // Reset bounds. |
| buf.limit(limit); |
| } |
| } |
| |
| /** {@inheritDoc} */ |
| @Override public byte[] bytes() { |
| // TODO IGNITE-15934 avoid copy. |
| byte[] tmp = new byte[buf.limit()]; |
| |
| buf.get(tmp); |
| buf.rewind(); |
| |
| return tmp; |
| } |
| } |