pylucene 3.5.0-3

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

diff --git a/lucene-java-3.5.0/lucene/contrib/queryparser/src/java/org/apache/lucene/queryParser/surround/query/SimpleTerm.java b/lucene-java-3.5.0/lucene/contrib/queryparser/src/java/org/apache/lucene/queryParser/surround/query/SimpleTerm.java
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+++ b/lucene-java-3.5.0/lucene/contrib/queryparser/src/java/org/apache/lucene/queryParser/surround/query/SimpleTerm.java
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+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 java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+
+import org.apache.lucene.index.IndexReader;
+import org.apache.lucene.index.Term;
+import org.apache.lucene.search.BooleanClause;
+import org.apache.lucene.search.Query;
+
+public abstract class SimpleTerm
+  extends SrndQuery
+  implements DistanceSubQuery, Comparable<SimpleTerm>
+{
+  public SimpleTerm(boolean q) {quoted = q;}
+  
+  private boolean quoted;
+  boolean isQuoted() {return quoted;}
+  
+  public String getQuote() {return "\"";}
+  public String getFieldOperator() {return "/";}
+  
+  public abstract String toStringUnquoted();
+  
+  public int compareTo(SimpleTerm ost) {
+    /* for ordering terms and prefixes before using an index, not used */
+    return this.toStringUnquoted().compareTo( ost.toStringUnquoted());
+  }
+  
+  protected void suffixToString(StringBuilder r) {} /* override for prefix query */
+  
+  @Override
+  public String toString() {
+    StringBuilder r = new StringBuilder();
+    if (isQuoted()) {
+      r.append(getQuote());
+    }
+    r.append(toStringUnquoted());
+    if (isQuoted()) {
+      r.append(getQuote());
+    }
+    suffixToString(r);
+    weightToString(r);
+    return r.toString();
+  }
+  
+  public abstract void visitMatchingTerms(
+                            IndexReader reader,
+                            String fieldName,
+                            MatchingTermVisitor mtv) throws IOException;
+  
+  public interface MatchingTermVisitor {
+    void visitMatchingTerm(Term t)throws IOException;
+  }
+
+  public String distanceSubQueryNotAllowed() {return null;}
+
+  
+  @Override
+  public Query makeLuceneQueryFieldNoBoost(final String fieldName, final BasicQueryFactory qf) {
+    return new Query() {
+      @Override
+      public String toString(String fn) {
+        return getClass().toString() + " " + fieldName + " (" + fn + "?)";
+      }
+      
+      @Override
+      public Query rewrite(IndexReader reader) throws IOException {
+        final List<Query> luceneSubQueries = new ArrayList<Query>();
+        visitMatchingTerms( reader, fieldName,
+            new MatchingTermVisitor() {
+              public void visitMatchingTerm(Term term) throws IOException {
+                luceneSubQueries.add(qf.newTermQuery(term));
+              }
+            });
+        return  (luceneSubQueries.size() == 0) ? SrndQuery.theEmptyLcnQuery
+              : (luceneSubQueries.size() == 1) ? luceneSubQueries.get(0)
+              : SrndBooleanQuery.makeBooleanQuery(
+                  /* luceneSubQueries all have default weight */
+                  luceneSubQueries, BooleanClause.Occur.SHOULD); /* OR the subquery terms */ 
+      }
+    };
+  }
+    
+  public void addSpanQueries(final SpanNearClauseFactory sncf) throws IOException {
+    visitMatchingTerms(
+          sncf.getIndexReader(),
+          sncf.getFieldName(),
+          new MatchingTermVisitor() {
+            public void visitMatchingTerm(Term term) throws IOException {
+              sncf.addTermWeighted(term, getWeight());
+            }
+          });
+  }
+}
+
+
+