| 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; |
| |
| |
| /** |
| * Only return those matches that have a specific payload at |
| * the given position. |
| * <p/> |
| * |
| */ |
| public class SpanNearPayloadCheckQuery extends SpanPositionCheckQuery { |
| protected final Collection<byte[]> payloadToMatch; |
| |
| /** |
| * @param match The underlying {@link SpanQuery} to check |
| * @param payloadToMatch The {@link java.util.Collection} of payloads to match |
| */ |
| public SpanNearPayloadCheckQuery(SpanNearQuery match, Collection<byte[]> payloadToMatch) { |
| super(match); |
| this.payloadToMatch = payloadToMatch; |
| } |
| |
| @Override |
| protected AcceptStatus acceptPosition(Spans spans) throws IOException { |
| boolean result = spans.isPayloadAvailable(); |
| if (result == true) { |
| Collection<byte[]> candidate = spans.getPayload(); |
| if (candidate.size() == payloadToMatch.size()) { |
| //TODO: check the byte arrays are the same |
| //hmm, can't rely on order here |
| int matches = 0; |
| for (byte[] candBytes : candidate) { |
| //Unfortunately, we can't rely on order, so we need to compare all |
| for (byte[] payBytes : payloadToMatch) { |
| if (Arrays.equals(candBytes, payBytes) == true) { |
| matches++; |
| break; |
| } |
| } |
| } |
| if (matches == payloadToMatch.size()){ |
| //we've verified all the bytes |
| return AcceptStatus.YES; |
| } else { |
| return AcceptStatus.NO; |
| } |
| } else { |
| return AcceptStatus.NO; |
| } |
| } |
| return AcceptStatus.NO; |
| } |
| |
| @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 SpanNearPayloadCheckQuery clone() { |
| SpanNearPayloadCheckQuery result = new SpanNearPayloadCheckQuery((SpanNearQuery) match.clone(), payloadToMatch); |
| result.setBoost(getBoost()); |
| return result; |
| } |
| |
| @Override |
| public boolean equals(Object o) { |
| if (this == o) return true; |
| if (!(o instanceof SpanNearPayloadCheckQuery)) return false; |
| |
| SpanNearPayloadCheckQuery other = (SpanNearPayloadCheckQuery) 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; |
| } |
| } |