Author: ab
Date: Tue Nov 14 11:38:06 2006
New Revision: 474934
URL: http://svn.apache.org/viewvc?view=rev&rev=474934
Log:
Add an ObjectWritable decorator.
Added:
lucene/nutch/trunk/src/java/org/apache/nutch/metadata/MetaWrapper.java
(with props)
Added: lucene/nutch/trunk/src/java/org/apache/nutch/metadata/MetaWrapper.java
URL:
http://svn.apache.org/viewvc/lucene/nutch/trunk/src/java/org/apache/nutch/metadata/MetaWrapper.java?view=auto&rev=474934
==============================================================================
--- lucene/nutch/trunk/src/java/org/apache/nutch/metadata/MetaWrapper.java
(added)
+++ lucene/nutch/trunk/src/java/org/apache/nutch/metadata/MetaWrapper.java Tue
Nov 14 11:38:06 2006
@@ -0,0 +1,109 @@
+/**
+ * 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.nutch.metadata;
+
+import java.io.DataInput;
+import java.io.DataOutput;
+import java.io.IOException;
+
+import org.apache.hadoop.conf.Configuration;
+import org.apache.hadoop.io.ObjectWritable;
+
+/**
+ * This is a simple decorator that adds metadata to any Object-s that can be
+ * serialized by <tt>ObjectWritable</tt>. This is useful when data needs to be
+ * temporarily enriched during processing, but this
+ * temporary metadata doesn't need to be permanently stored after the job is
done.
+ *
+ * @author Andrzej Bialecki
+ */
+public class MetaWrapper extends ObjectWritable {
+ private Metadata metadata;
+
+ public MetaWrapper() {
+ super();
+ metadata = new Metadata();
+ }
+
+ public MetaWrapper(Object object, Configuration conf) {
+ super(object);
+ metadata = new Metadata();
+ setConf(conf);
+ }
+
+ public MetaWrapper(Metadata metadata, Object object, Configuration conf) {
+ super(object);
+ if (metadata == null) metadata = new Metadata();
+ this.metadata = metadata;
+ setConf(conf);
+ }
+
+ /**
+ * Get all metadata.
+ */
+ public Metadata getMetadata() {
+ return metadata;
+ }
+
+ /**
+ * Add metadata. See [EMAIL PROTECTED] Metadata#add(String, String)} for
more information.
+ * @param name metadata name
+ * @param value metadata value
+ */
+ public void addMeta(String name, String value) {
+ metadata.add(name, value);
+ }
+
+ /**
+ * Set metadata. See [EMAIL PROTECTED] Metadata#set(String, String)} for
more information.
+ * @param name
+ * @param value
+ */
+ public void setMeta(String name, String value) {
+ metadata.set(name, value);
+ }
+
+ /**
+ * Get metadata. See [EMAIL PROTECTED] Metadata#get(String)} for more
information.
+ * @param name
+ * @return metadata value
+ */
+ public String getMeta(String name) {
+ return metadata.get(name);
+ }
+
+ /**
+ * Get multiple metadata. See [EMAIL PROTECTED] Metadata#getValues(String)}
for more information.
+ * @param name
+ * @return multiple values
+ */
+ public String[] getMetaValues(String name) {
+ return metadata.getValues(name);
+ }
+
+ public void readFields(DataInput in) throws IOException {
+ super.readFields(in);
+ metadata = new Metadata();
+ metadata.readFields(in);
+ }
+
+ public void write(DataOutput out) throws IOException {
+ super.write(out);
+ metadata.write(out);
+ }
+}
\ No newline at end of file
Propchange:
lucene/nutch/trunk/src/java/org/apache/nutch/metadata/MetaWrapper.java
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svn:eol-style = native
