| /* |
| * 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.processors.cache.persistence.wal; |
| |
| import java.io.IOException; |
| import java.nio.ByteBuffer; |
| import org.jetbrains.annotations.NotNull; |
| |
| /** |
| * Byte buffer backed data input. |
| */ |
| public class ByteBufferBackedDataInputImpl implements ByteBufferBackedDataInput { |
| /** Buffer. */ |
| private ByteBuffer buf; |
| |
| /** |
| * @param buf New buffer. |
| */ |
| public ByteBufferBackedDataInput buffer(ByteBuffer buf) { |
| this.buf = buf; |
| |
| return this; |
| } |
| |
| /** {@inheritDoc} */ |
| @Override public ByteBuffer buffer() { |
| return buf; |
| } |
| |
| /** {@inheritDoc} */ |
| @Override public void ensure(int requested) throws IOException { |
| if (buf.remaining() < requested) |
| throw new IOException("Requested size is greater than buffer: " + requested); |
| } |
| |
| /** {@inheritDoc} */ |
| @Override public void readFully(@NotNull byte[] b) throws IOException { |
| ensure(b.length); |
| |
| buf.get(b); |
| } |
| |
| /** {@inheritDoc} */ |
| @Override public void readFully(@NotNull byte[] b, int off, int len) throws IOException { |
| ensure(b.length); |
| |
| buf.get(b, off, len); |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| @Override public int skipBytes(int n) throws IOException { |
| ensure(n); |
| |
| buf.position(buf.position() + n); |
| |
| return n; |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| @Override public boolean readBoolean() throws IOException { |
| return readByte() == 1; |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| @Override public byte readByte() throws IOException { |
| ensure(1); |
| |
| return buf.get(); |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| @Override public int readUnsignedByte() throws IOException { |
| return readByte() & 0xFF; |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| @Override public short readShort() throws IOException { |
| ensure(2); |
| |
| return buf.getShort(); |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| @Override public int readUnsignedShort() throws IOException { |
| return readShort() & 0xFFFF; |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| @Override public char readChar() throws IOException { |
| ensure(2); |
| |
| return buf.getChar(); |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| @Override public int readInt() throws IOException { |
| ensure(4); |
| |
| return buf.getInt(); |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| @Override public long readLong() throws IOException { |
| ensure(8); |
| |
| return buf.getLong(); |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| @Override public float readFloat() throws IOException { |
| ensure(4); |
| |
| return buf.getFloat(); |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| @Override public double readDouble() throws IOException { |
| ensure(8); |
| |
| return buf.getDouble(); |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| @Override public String readLine() throws IOException { |
| throw new UnsupportedOperationException(); |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| @Override public String readUTF() throws IOException { |
| throw new UnsupportedOperationException(); |
| } |
| } |