pylucene 3.5.0-3

[pylucene.git] / lucene-java-3.5.0 / lucene / src / java / org / apache / lucene / search / spans / SpanPositionRangeQuery.java

diff --git a/lucene-java-3.5.0/lucene/src/java/org/apache/lucene/search/spans/SpanPositionRangeQuery.java b/lucene-java-3.5.0/lucene/src/java/org/apache/lucene/search/spans/SpanPositionRangeQuery.java
new file mode 100644 (file)
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--- /dev/null
+++ b/lucene-java-3.5.0/lucene/src/java/org/apache/lucene/search/spans/SpanPositionRangeQuery.java
@@ -0,0 +1,105 @@
+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;
+
+
+/**
+ * Checks to see if the {@link #getMatch()} lies between a start and end position
+ *
+ * @see org.apache.lucene.search.spans.SpanFirstQuery for a derivation that is optimized for the case where start position is 0
+ */
+public class SpanPositionRangeQuery extends SpanPositionCheckQuery {
+  protected int start = 0;
+  protected int end;
+
+  public SpanPositionRangeQuery(SpanQuery match, int start, int end) {
+    super(match);
+    this.start = start;
+    this.end = end;
+  }
+
+
+  @Override
+  protected AcceptStatus acceptPosition(Spans spans) throws IOException {
+    assert spans.start() != spans.end();
+    if (spans.start() >= end)
+      return AcceptStatus.NO_AND_ADVANCE;
+    else if (spans.start() >= start && spans.end() <= end)
+      return AcceptStatus.YES;
+    else
+      return AcceptStatus.NO;
+  }
+
+
+  /**
+   * @return The minimum position permitted in a match
+   */
+  public int getStart() {
+    return start;
+  }
+
+  /**
+   * @return the maximum end position permitted in a match.
+   */
+  public int getEnd() {
+    return end;
+  }
+
+  @Override
+  public String toString(String field) {
+    StringBuilder buffer = new StringBuilder();
+    buffer.append("spanPosRange(");
+    buffer.append(match.toString(field));
+    buffer.append(", ").append(start).append(", ");
+    buffer.append(end);
+    buffer.append(")");
+    buffer.append(ToStringUtils.boost(getBoost()));
+    return buffer.toString();
+  }
+
+  @Override
+  public Object clone() {
+    SpanPositionRangeQuery result = new SpanPositionRangeQuery((SpanQuery) match.clone(), start, end);
+    result.setBoost(getBoost());
+    return result;
+  }
+
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) return true;
+    if (!(o instanceof SpanPositionRangeQuery)) return false;
+
+    SpanPositionRangeQuery other = (SpanPositionRangeQuery)o;
+    return this.end == other.end && this.start == other.start
+         && this.match.equals(other.match)
+         && this.getBoost() == other.getBoost();
+  }
+
+  @Override
+  public int hashCode() {
+    int h = match.hashCode();
+    h ^= (h << 8) | (h >>> 25);  // reversible
+    h ^= Float.floatToRawIntBits(getBoost()) ^ end ^ start;
+    return h;
+  }
+
+}
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