SpanScorerpublic class SpanScorer extends Scorer | Copyright 2006 The Apache Software Foundation
Licensed 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. |
| Fields Summary |
|---|
| private Spans | spans | | private Weight | weight | | private byte[] | norms | | private float | value | | private boolean | firstTime | | private boolean | more | | private int | doc | | private float | freq |
| Constructors Summary |
|---|
SpanScorer(Spans spans, Weight weight, Similarity similarity, byte[] norms)
super(similarity);
this.spans = spans;
this.norms = norms;
this.weight = weight;
this.value = weight.getValue();
doc = -1;
|
| Methods Summary |
|---|
| public int | doc() return doc;
| | public org.apache.lucene.search.Explanation | explain(int doc)
Explanation tfExplanation = new Explanation();
skipTo(doc);
float phraseFreq = (doc() == doc) ? freq : 0.0f;
tfExplanation.setValue(getSimilarity().tf(phraseFreq));
tfExplanation.setDescription("tf(phraseFreq=" + phraseFreq + ")");
return tfExplanation;
| | public boolean | next()
if (firstTime) {
more = spans.next();
firstTime = false;
}
return setFreqCurrentDoc();
| | public float | score()
float raw = getSimilarity().tf(freq) * value; // raw score
return raw * Similarity.decodeNorm(norms[doc]); // normalize
| | private boolean | setFreqCurrentDoc()
if (! more) {
return false;
}
doc = spans.doc();
freq = 0.0f;
while (more && doc == spans.doc()) {
int matchLength = spans.end() - spans.start();
freq += getSimilarity().sloppyFreq(matchLength);
more = spans.next();
}
return more || (freq != 0);
| | public boolean | skipTo(int target)
if (firstTime) {
more = spans.skipTo(target);
firstTime = false;
}
if (! more) {
return false;
}
if (spans.doc() < target) { // setFreqCurrentDoc() leaves spans.doc() ahead
more = spans.skipTo(target);
}
return setFreqCurrentDoc();
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