BinaryRecordOutput.java
上传用户:quxuerui
上传日期:2018-01-08
资源大小:41811k
文件大小:3k
- /**
- * 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.hadoop.record;
- import java.io.IOException;
- import java.util.TreeMap;
- import java.util.ArrayList;
- import java.io.DataOutput;
- import java.io.DataOutputStream;
- import java.io.OutputStream;
- /**
- */
- public class BinaryRecordOutput implements RecordOutput {
-
- private DataOutput out;
-
- private BinaryRecordOutput() {}
-
- private void setDataOutput(DataOutput out) {
- this.out = out;
- }
-
- private static ThreadLocal bOut = new ThreadLocal() {
- protected synchronized Object initialValue() {
- return new BinaryRecordOutput();
- }
- };
-
- /**
- * Get a thread-local record output for the supplied DataOutput.
- * @param out data output stream
- * @return binary record output corresponding to the supplied DataOutput.
- */
- public static BinaryRecordOutput get(DataOutput out) {
- BinaryRecordOutput bout = (BinaryRecordOutput) bOut.get();
- bout.setDataOutput(out);
- return bout;
- }
-
- /** Creates a new instance of BinaryRecordOutput */
- public BinaryRecordOutput(OutputStream out) {
- this.out = new DataOutputStream(out);
- }
-
- /** Creates a new instance of BinaryRecordOutput */
- public BinaryRecordOutput(DataOutput out) {
- this.out = out;
- }
-
-
- public void writeByte(byte b, String tag) throws IOException {
- out.writeByte(b);
- }
-
- public void writeBool(boolean b, String tag) throws IOException {
- out.writeBoolean(b);
- }
-
- public void writeInt(int i, String tag) throws IOException {
- Utils.writeVInt(out, i);
- }
-
- public void writeLong(long l, String tag) throws IOException {
- Utils.writeVLong(out, l);
- }
-
- public void writeFloat(float f, String tag) throws IOException {
- out.writeFloat(f);
- }
-
- public void writeDouble(double d, String tag) throws IOException {
- out.writeDouble(d);
- }
-
- public void writeString(String s, String tag) throws IOException {
- Utils.toBinaryString(out, s);
- }
-
- public void writeBuffer(Buffer buf, String tag)
- throws IOException {
- byte[] barr = buf.get();
- int len = buf.getCount();
- Utils.writeVInt(out, len);
- out.write(barr, 0, len);
- }
-
- public void startRecord(Record r, String tag) throws IOException {}
-
- public void endRecord(Record r, String tag) throws IOException {}
-
- public void startVector(ArrayList v, String tag) throws IOException {
- writeInt(v.size(), tag);
- }
-
- public void endVector(ArrayList v, String tag) throws IOException {}
-
- public void startMap(TreeMap v, String tag) throws IOException {
- writeInt(v.size(), tag);
- }
-
- public void endMap(TreeMap v, String tag) throws IOException {}
-
- }