pylucene 3.5.0-3

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

diff --git a/lucene-java-3.5.0/lucene/contrib/queryparser/src/java/org/apache/lucene/queryParser/surround/query/SrndQuery.java b/lucene-java-3.5.0/lucene/contrib/queryparser/src/java/org/apache/lucene/queryParser/surround/query/SrndQuery.java
new file mode 100644 (file)
index 0000000..523c076
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+++ b/lucene-java-3.5.0/lucene/contrib/queryparser/src/java/org/apache/lucene/queryParser/surround/query/SrndQuery.java
@@ -0,0 +1,86 @@
+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.search.BooleanClause;
+import org.apache.lucene.search.BooleanQuery;
+import org.apache.lucene.search.Query;
+
+public abstract class SrndQuery implements Cloneable {
+  public SrndQuery() {}
+  
+  private float weight = (float) 1.0;
+  private boolean weighted = false;
+
+  public void setWeight(float w) {
+    weight = w; /* as parsed from the query text */
+    weighted = true;
+  } 
+  public boolean isWeighted() {return weighted;}
+  public float getWeight() { return weight; }
+  public String getWeightString() {return Float.toString(getWeight());}
+
+  public String getWeightOperator() {return "^";}
+
+  protected void weightToString(StringBuilder r) { /* append the weight part of a query */
+    if (isWeighted()) {
+      r.append(getWeightOperator());
+      r.append(getWeightString());
+    }
+  }
+  
+  public Query makeLuceneQueryField(String fieldName, BasicQueryFactory qf){
+    Query q = makeLuceneQueryFieldNoBoost(fieldName, qf);
+    if (isWeighted()) {
+      q.setBoost(getWeight() * q.getBoost()); /* weight may be at any level in a SrndQuery */
+    }
+    return q;
+  }
+  
+  public abstract Query makeLuceneQueryFieldNoBoost(String fieldName, BasicQueryFactory qf);
+  
+  @Override
+  public abstract String toString();
+  
+  public boolean isFieldsSubQueryAcceptable() {return true;}
+    
+  @Override
+  public Object clone() {
+    try {
+      return super.clone();
+    } catch (CloneNotSupportedException cns) {
+      throw new Error(cns);
+    }
+  }
+  
+/* An empty Lucene query */
+  public final static Query theEmptyLcnQuery = new BooleanQuery() { /* no changes allowed */
+    @Override
+    public void setBoost(float boost) {
+      throw new UnsupportedOperationException();
+    }
+    @Override
+    public void add(BooleanClause clause) {
+      throw new UnsupportedOperationException();
+    }
+    @Override
+    public void add(Query query, BooleanClause.Occur occur) {
+      throw new UnsupportedOperationException();
+    }
+  };
+}
+