X-Git-Url: https://git.mdrn.pl/pylucene.git/blobdiff_plain/a2e61f0c04805cfcb8706176758d1283c7e3a55c..aaeed5504b982cf3545252ab528713250aa33eed:/lucene-java-3.5.0/lucene/src/java/org/apache/lucene/search/TermRangeFilter.java diff --git a/lucene-java-3.5.0/lucene/src/java/org/apache/lucene/search/TermRangeFilter.java b/lucene-java-3.5.0/lucene/src/java/org/apache/lucene/search/TermRangeFilter.java new file mode 100644 index 0000000..923fb8b --- /dev/null +++ b/lucene-java-3.5.0/lucene/src/java/org/apache/lucene/search/TermRangeFilter.java @@ -0,0 +1,108 @@ +package org.apache.lucene.search; + +/** + * 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.text.Collator; + +/** + * A Filter that restricts search results to a range of term + * values in a given field. + * + *

This filter matches the documents looking for terms that fall into the + * supplied range according to {@link + * String#compareTo(String)}, unless a Collator is provided. It is not intended + * for numerical ranges; use {@link NumericRangeFilter} instead. + * + *

If you construct a large number of range filters with different ranges but on the + * same field, {@link FieldCacheRangeFilter} may have significantly better performance. + * @since 2.9 + */ +public class TermRangeFilter extends MultiTermQueryWrapperFilter { + + /** + * @param fieldName The field this range applies to + * @param lowerTerm The lower bound on this range + * @param upperTerm The upper bound on this range + * @param includeLower Does this range include the lower bound? + * @param includeUpper Does this range include the upper bound? + * @throws IllegalArgumentException if both terms are null or if + * lowerTerm is null and includeLower is true (similar for upperTerm + * and includeUpper) + */ + public TermRangeFilter(String fieldName, String lowerTerm, String upperTerm, + boolean includeLower, boolean includeUpper) { + super(new TermRangeQuery(fieldName, lowerTerm, upperTerm, includeLower, includeUpper)); + } + + /** + * WARNING: Using this constructor and supplying a non-null + * value in the collator parameter will cause every single + * index Term in the Field referenced by lowerTerm and/or upperTerm to be + * examined. Depending on the number of index Terms in this Field, the + * operation could be very slow. + * + * @param lowerTerm The lower bound on this range + * @param upperTerm The upper bound on this range + * @param includeLower Does this range include the lower bound? + * @param includeUpper Does this range include the upper bound? + * @param collator The collator to use when determining range inclusion; set + * to null to use Unicode code point ordering instead of collation. + * @throws IllegalArgumentException if both terms are null or if + * lowerTerm is null and includeLower is true (similar for upperTerm + * and includeUpper) + */ + public TermRangeFilter(String fieldName, String lowerTerm, String upperTerm, + boolean includeLower, boolean includeUpper, + Collator collator) { + super(new TermRangeQuery(fieldName, lowerTerm, upperTerm, includeLower, includeUpper, collator)); + } + + /** + * Constructs a filter for field fieldName matching + * less than or equal to upperTerm. + */ + public static TermRangeFilter Less(String fieldName, String upperTerm) { + return new TermRangeFilter(fieldName, null, upperTerm, false, true); + } + + /** + * Constructs a filter for field fieldName matching + * greater than or equal to lowerTerm. + */ + public static TermRangeFilter More(String fieldName, String lowerTerm) { + return new TermRangeFilter(fieldName, lowerTerm, null, true, false); + } + + /** Returns the field name for this filter */ + public String getField() { return query.getField(); } + + /** Returns the lower value of this range filter */ + public String getLowerTerm() { return query.getLowerTerm(); } + + /** Returns the upper value of this range filter */ + public String getUpperTerm() { return query.getUpperTerm(); } + + /** Returns true if the lower endpoint is inclusive */ + public boolean includesLower() { return query.includesLower(); } + + /** Returns true if the upper endpoint is inclusive */ + public boolean includesUpper() { return query.includesUpper(); } + + /** Returns the collator used to determine range inclusion, if any. */ + public Collator getCollator() { return query.getCollator(); } +}