X-Git-Url: https://git.mdrn.pl/pylucene.git/blobdiff_plain/a2e61f0c04805cfcb8706176758d1283c7e3a55c..aaeed5504b982cf3545252ab528713250aa33eed:/lucene-java-3.4.0/lucene/src/java/org/apache/lucene/search/spans/FieldMaskingSpanQuery.java

diff --git a/lucene-java-3.4.0/lucene/src/java/org/apache/lucene/search/spans/FieldMaskingSpanQuery.java b/lucene-java-3.4.0/lucene/src/java/org/apache/lucene/search/spans/FieldMaskingSpanQuery.java
deleted file mode 100644
index f6eeecb..0000000
--- a/lucene-java-3.4.0/lucene/src/java/org/apache/lucene/search/spans/FieldMaskingSpanQuery.java
+++ /dev/null
@@ -1,155 +0,0 @@
-package org.apache.lucene.search.spans;
-
-/**
- * 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.Set;
-
-import org.apache.lucene.index.IndexReader;
-import org.apache.lucene.index.Term;
-import org.apache.lucene.search.Query;
-import org.apache.lucene.search.Weight;
-import org.apache.lucene.search.Searcher;
-import org.apache.lucene.search.Similarity;
-import org.apache.lucene.util.ToStringUtils;
-
-/**
- * <p>Wrapper to allow {@link SpanQuery} objects participate in composite 
- * single-field SpanQueries by 'lying' about their search field. That is, 
- * the masked SpanQuery will function as normal, 
- * but {@link SpanQuery#getField()} simply hands back the value supplied 
- * in this class's constructor.</p>
- * 
- * <p>This can be used to support Queries like {@link SpanNearQuery} or 
- * {@link SpanOrQuery} across different fields, which is not ordinarily 
- * permitted.</p>
- * 
- * <p>This can be useful for denormalized relational data: for example, when 
- * indexing a document with conceptually many 'children': </p>
- * 
- * <pre>
- *  teacherid: 1
- *  studentfirstname: james
- *  studentsurname: jones
- *  
- *  teacherid: 2
- *  studenfirstname: james
- *  studentsurname: smith
- *  studentfirstname: sally
- *  studentsurname: jones
- * </pre>
- * 
- * <p>a SpanNearQuery with a slop of 0 can be applied across two 
- * {@link SpanTermQuery} objects as follows:
- * <pre>
- *    SpanQuery q1  = new SpanTermQuery(new Term("studentfirstname", "james"));
- *    SpanQuery q2  = new SpanTermQuery(new Term("studentsurname", "jones"));
- *    SpanQuery q2m = new FieldMaskingSpanQuery(q2, "studentfirstname");
- *    Query q = new SpanNearQuery(new SpanQuery[]{q1, q2m}, -1, false);
- * </pre>
- * to search for 'studentfirstname:james studentsurname:jones' and find 
- * teacherid 1 without matching teacherid 2 (which has a 'james' in position 0 
- * and 'jones' in position 1). </p>
- * 
- * <p>Note: as {@link #getField()} returns the masked field, scoring will be 
- * done using the norms of the field name supplied. This may lead to unexpected
- * scoring behaviour.</p>
- */
-public class FieldMaskingSpanQuery extends SpanQuery {
-  private SpanQuery maskedQuery;
-  private String field;
-    
-  public FieldMaskingSpanQuery(SpanQuery maskedQuery, String maskedField) {
-    this.maskedQuery = maskedQuery;
-    this.field = maskedField;
-  }
-
-  @Override
-  public String getField() {
-    return field;
-  }
-
-  public SpanQuery getMaskedQuery() {
-    return maskedQuery;
-  }
-
-  // :NOTE: getBoost and setBoost are not proxied to the maskedQuery
-  // ...this is done to be more consistent with things like SpanFirstQuery
-  
-  @Override
-  public Spans getSpans(IndexReader reader) throws IOException {
-    return maskedQuery.getSpans(reader);
-  }
-
-  @Override
-  public void extractTerms(Set<Term> terms) {
-    maskedQuery.extractTerms(terms);
-  }  
-
-  @Override
-  public Weight createWeight(Searcher searcher) throws IOException {
-    return maskedQuery.createWeight(searcher);
-  }
-
-  @Override
-  public Query rewrite(IndexReader reader) throws IOException {
-    FieldMaskingSpanQuery clone = null;
-
-    SpanQuery rewritten = (SpanQuery) maskedQuery.rewrite(reader);
-    if (rewritten != maskedQuery) {
-      clone = (FieldMaskingSpanQuery) this.clone();
-      clone.maskedQuery = rewritten;
-    }
-
-    if (clone != null) {
-      return clone;
-    } else {
-      return this;
-    }
-  }
-
-  @Override
-  public String toString(String field) {
-    StringBuilder buffer = new StringBuilder();
-    buffer.append("mask(");
-    buffer.append(maskedQuery.toString(field));
-    buffer.append(")");
-    buffer.append(ToStringUtils.boost(getBoost()));
-    buffer.append(" as ");
-    buffer.append(this.field);
-    return buffer.toString();
-  }
-  
-  @Override
-  public boolean equals(Object o) {
-    if (!(o instanceof FieldMaskingSpanQuery))
-      return false;
-    FieldMaskingSpanQuery other = (FieldMaskingSpanQuery) o;
-    return (this.getField().equals(other.getField())
-            && (this.getBoost() == other.getBoost())
-            && this.getMaskedQuery().equals(other.getMaskedQuery()));
-
-  }
-  
-  @Override
-  public int hashCode() {
-    return getMaskedQuery().hashCode()
-      ^ getField().hashCode()
-      ^ Float.floatToRawIntBits(getBoost());
-  }
-}