pylucene 3.5.0-3

[pylucene.git] / lucene-java-3.5.0 / lucene / contrib / queryparser / src / java / org / apache / lucene / queryParser / surround / query / SrndPrefixQuery.java

diff --git a/lucene-java-3.5.0/lucene/contrib/queryparser/src/java/org/apache/lucene/queryParser/surround/query/SrndPrefixQuery.java b/lucene-java-3.5.0/lucene/contrib/queryparser/src/java/org/apache/lucene/queryParser/surround/query/SrndPrefixQuery.java
new file mode 100644 (file)
index 0000000..c39b2f0
--- /dev/null
+++ b/lucene-java-3.5.0/lucene/contrib/queryparser/src/java/org/apache/lucene/queryParser/surround/query/SrndPrefixQuery.java
@@ -0,0 +1,72 @@
+package org.apache.lucene.queryParser.surround.query;
+/**
+ * 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.
+ */
+
+import org.apache.lucene.index.Term;
+import org.apache.lucene.index.TermEnum;
+import org.apache.lucene.index.IndexReader;
+
+import java.io.IOException;
+
+
+public class SrndPrefixQuery extends SimpleTerm {
+  public SrndPrefixQuery(String prefix, boolean quoted, char truncator) {
+    super(quoted);
+    this.prefix = prefix;
+    this.truncator = truncator;
+  }
+
+  private final String prefix;
+  public String getPrefix() {return prefix;}
+  
+  private final char truncator;
+  public char getSuffixOperator() {return truncator;}
+  
+  public Term getLucenePrefixTerm(String fieldName) {
+    return new Term(fieldName, getPrefix());
+  }
+  
+  @Override
+  public String toStringUnquoted() {return getPrefix();}
+  
+  @Override
+  protected void suffixToString(StringBuilder r) {r.append(getSuffixOperator());}
+  
+  @Override
+  public void visitMatchingTerms(
+    IndexReader reader,
+    String fieldName,
+    MatchingTermVisitor mtv) throws IOException
+  {
+    /* inspired by PrefixQuery.rewrite(): */
+    TermEnum enumerator = reader.terms(getLucenePrefixTerm(fieldName));
+    try {
+      do {
+        Term term = enumerator.term();
+        if ((term != null)
+            && term.text().startsWith(getPrefix())
+            && term.field().equals(fieldName)) {
+          mtv.visitMatchingTerm(term);
+        } else {
+          break;
+        }
+      } while (enumerator.next());
+    } finally {
+      enumerator.close();
+    }
+  }
+}