svn commit: r209669 - /lucene/nutch/trunk/src/plugin/languageidentifier/src/java/org/apache/nutch/analysis/lang/LanguageIndexingFilter.java

[ab...@apache.org]

Author: ab
Date: Thu Jul  7 15:43:49 2005
New Revision: 209669

URL: http://svn.apache.org/viewcvs?rev=209669&view=rev
Log:
Forgot to add this one, sorry.

Added:
    lucene/nutch/trunk/src/plugin/languageidentifier/src/java/org/apache/nutch/analysis/lang/LanguageIndexingFilter.java   (with props)

Added: lucene/nutch/trunk/src/plugin/languageidentifier/src/java/org/apache/nutch/analysis/lang/LanguageIndexingFilter.java
URL: http://svn.apache.org/viewcvs/lucene/nutch/trunk/src/plugin/languageidentifier/src/java/org/apache/nutch/analysis/lang/LanguageIndexingFilter.java?rev=209669&view=auto
==============================================================================
--- lucene/nutch/trunk/src/plugin/languageidentifier/src/java/org/apache/nutch/analysis/lang/LanguageIndexingFilter.java (added)
+++ lucene/nutch/trunk/src/plugin/languageidentifier/src/java/org/apache/nutch/analysis/lang/LanguageIndexingFilter.java Thu Jul  7 15:43:49 2005
@@ -0,0 +1,89 @@
+/**
+ * Copyright 2005 The Apache Software Foundation
+ *
+ * Licensed 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.analysis.lang;
+
+
+// Nutch imports
+import org.apache.nutch.fetcher.FetcherOutput;
+import org.apache.nutch.indexer.IndexingFilter;
+import org.apache.nutch.indexer.IndexingException;
+import org.apache.nutch.parse.Parse;
+
+// Lucene imports
+import org.apache.lucene.document.Field;
+import org.apache.lucene.document.Document;
+
+
+/**
+ * An {@link org.apache.nutch.indexer.IndexingFilter} that 
+ * add a <code>lang</code> (language) field to the document.
+ *
+ * It tries to find the language of the document by:
+ * <ul>
+ *   <li>First, checking if {@link HTMLLanguageParser} add some language
+ *       information</li>
+ *   <li>Then, checking if a <code>Content-Language</code> HTTP header can be
+ *       found</li>
+ *   <li>Finaly by analyzing the document content</li>
+ * </ul>
+ *   
+ * @author Sami Siren
+ * @author Jerome Charron
+ */
+public class LanguageIndexingFilter implements IndexingFilter {
+  
+
+  /**
+   * Constructs a new Language Indexing Filter.
+   */
+  public LanguageIndexingFilter() {
+
+  }
+
+  // Inherited JavaDoc
+  public Document filter(Document doc, Parse parse, FetcherOutput fo)
+    throws IndexingException {
+
+    //check if X-meta-lang found, possibly put there by HTMLLanguageParser
+    String lang = parse.getData().get(HTMLLanguageParser.META_LANG_NAME);
+
+    //check if HTTP-header tels us the language
+    if (lang == null) {
+        lang = parse.getData().get("Content-Language");
+    }
+    
+    if (lang == null) {
+      StringBuffer text = new StringBuffer();
+      /*
+       * String[] anchors = fo.getAnchors(); for (int i = 0; i < anchors.length;
+       * i++) { text+=anchors[i] + " "; }
+       */
+      text.append(parse.getData().getTitle())
+          .append(" ")
+          .append(parse.getText());
+      lang = LanguageIdentifier.getInstance().identify(text);
+    }
+
+    if (lang == null) {
+      lang = "unknown";
+    }
+
+    doc.add(Field.Keyword("lang", lang));
+
+    return doc;
+  }
+
+}

Propchange: lucene/nutch/trunk/src/plugin/languageidentifier/src/java/org/apache/nutch/analysis/lang/LanguageIndexingFilter.java
------------------------------------------------------------------------------
    svn:eol-style = native