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/spans/SpanPayloadCheckQuery.java?ds=inline
diff --git a/lucene-java-3.5.0/lucene/src/java/org/apache/lucene/search/spans/SpanPayloadCheckQuery.java b/lucene-java-3.5.0/lucene/src/java/org/apache/lucene/search/spans/SpanPayloadCheckQuery.java
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+++ b/lucene-java-3.5.0/lucene/src/java/org/apache/lucene/search/spans/SpanPayloadCheckQuery.java
@@ -0,0 +1,119 @@
+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 org.apache.lucene.util.ToStringUtils;
+
+import java.io.IOException;
+import java.util.Arrays;
+import java.util.Collection;
+import java.util.Iterator;
+
+
+/**
+ * Only return those matches that have a specific payload at
+ * the given position.
+ *
+ * Do not use this with an SpanQuery that contains a {@link org.apache.lucene.search.spans.SpanNearQuery}. Instead, use
+ * {@link SpanNearPayloadCheckQuery} since it properly handles the fact that payloads
+ * aren't ordered by {@link org.apache.lucene.search.spans.SpanNearQuery}.
+ *
+ **/
+public class SpanPayloadCheckQuery extends SpanPositionCheckQuery{
+ protected final Collection payloadToMatch;
+
+ /**
+ *
+ * @param match The underlying {@link org.apache.lucene.search.spans.SpanQuery} to check
+ * @param payloadToMatch The {@link java.util.Collection} of payloads to match
+ */
+ public SpanPayloadCheckQuery(SpanQuery match, Collection payloadToMatch) {
+ super(match);
+ if (match instanceof SpanNearQuery){
+ throw new IllegalArgumentException("SpanNearQuery not allowed");
+ }
+ this.payloadToMatch = payloadToMatch;
+ }
+
+ @Override
+ protected AcceptStatus acceptPosition(Spans spans) throws IOException {
+ boolean result = spans.isPayloadAvailable();
+ if (result == true){
+ Collection candidate = spans.getPayload();
+ if (candidate.size() == payloadToMatch.size()){
+ //TODO: check the byte arrays are the same
+ Iterator toMatchIter = payloadToMatch.iterator();
+ //check each of the byte arrays, in order
+ //hmm, can't rely on order here
+ for (byte[] candBytes : candidate) {
+ //if one is a mismatch, then return false
+ if (Arrays.equals(candBytes, toMatchIter.next()) == false){
+ return AcceptStatus.NO;
+ }
+ }
+ //we've verified all the bytes
+ return AcceptStatus.YES;
+ } else {
+ return AcceptStatus.NO;
+ }
+ }
+ return AcceptStatus.YES;
+ }
+
+ @Override
+ public String toString(String field) {
+ StringBuilder buffer = new StringBuilder();
+ buffer.append("spanPayCheck(");
+ buffer.append(match.toString(field));
+ buffer.append(", payloadRef: ");
+ for (byte[] bytes : payloadToMatch) {
+ ToStringUtils.byteArray(buffer, bytes);
+ buffer.append(';');
+ }
+ buffer.append(")");
+ buffer.append(ToStringUtils.boost(getBoost()));
+ return buffer.toString();
+ }
+
+ @Override
+ public Object clone() {
+ SpanPayloadCheckQuery result = new SpanPayloadCheckQuery((SpanQuery) match.clone(), payloadToMatch);
+ result.setBoost(getBoost());
+ return result;
+ }
+
+ @Override
+ public boolean equals(Object o) {
+ if (this == o) return true;
+ if (!(o instanceof SpanPayloadCheckQuery)) return false;
+
+ SpanPayloadCheckQuery other = (SpanPayloadCheckQuery)o;
+ return this.payloadToMatch.equals(other.payloadToMatch)
+ && this.match.equals(other.match)
+ && this.getBoost() == other.getBoost();
+ }
+
+ @Override
+ public int hashCode() {
+ int h = match.hashCode();
+ h ^= (h << 8) | (h >>> 25); // reversible
+ //TODO: is this right?
+ h ^= payloadToMatch.hashCode();
+ h ^= Float.floatToRawIntBits(getBoost()) ;
+ return h;
+ }
+}
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