mirror of https://github.com/apache/lucene.git
SOLR-9897: re-indent UnifiedSolrHighlighter.java
This commit is contained in:
David Smiley
parent
9d606d8ff0
commit
9bd152804d
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@ -110,256 +110,256 @@ import org.apache.solr.util.plugin.PluginInfoInitialized;
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*/
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public class UnifiedSolrHighlighter extends SolrHighlighter implements PluginInfoInitialized {
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protected static final String SNIPPET_SEPARATOR = "\u0000";
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private static final String[] ZERO_LEN_STR_ARRAY = new String[0];
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protected static final String SNIPPET_SEPARATOR = "\u0000";
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private static final String[] ZERO_LEN_STR_ARRAY = new String[0];
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@Override
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public void init(PluginInfo info) {
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@Override
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public void init(PluginInfo info) {
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}
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@Override
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public NamedList<Object> doHighlighting(DocList docs, Query query, SolrQueryRequest req, String[] defaultFields) throws IOException {
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final SolrParams params = req.getParams();
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// if highlighting isn't enabled, then why call doHighlighting?
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if (!isHighlightingEnabled(params))
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return null;
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int[] docIDs = toDocIDs(docs);
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// fetch the unique keys
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String[] keys = getUniqueKeys(req.getSearcher(), docIDs);
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// query-time parameters
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String[] fieldNames = getHighlightFields(query, req, defaultFields);
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int maxPassages[] = new int[fieldNames.length];
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for (int i = 0; i < fieldNames.length; i++) {
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maxPassages[i] = params.getFieldInt(fieldNames[i], HighlightParams.SNIPPETS, 1);
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}
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@Override
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public NamedList<Object> doHighlighting(DocList docs, Query query, SolrQueryRequest req, String[] defaultFields) throws IOException {
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final SolrParams params = req.getParams();
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UnifiedHighlighter highlighter = getHighlighter(req);
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Map<String, String[]> snippets = highlighter.highlightFields(fieldNames, query, docIDs, maxPassages);
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return encodeSnippets(keys, fieldNames, snippets);
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}
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// if highlighting isn't enabled, then why call doHighlighting?
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if (!isHighlightingEnabled(params))
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return null;
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/**
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* Creates an instance of the Lucene {@link UnifiedHighlighter}. Provided for subclass extension so that
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* a subclass can return a subclass of {@link SolrExtendedUnifiedHighlighter}.
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*/
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protected UnifiedHighlighter getHighlighter(SolrQueryRequest req) {
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return new SolrExtendedUnifiedHighlighter(req);
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}
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int[] docIDs = toDocIDs(docs);
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// fetch the unique keys
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String[] keys = getUniqueKeys(req.getSearcher(), docIDs);
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// query-time parameters
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String[] fieldNames = getHighlightFields(query, req, defaultFields);
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int maxPassages[] = new int[fieldNames.length];
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for (int i = 0; i < fieldNames.length; i++) {
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maxPassages[i] = params.getFieldInt(fieldNames[i], HighlightParams.SNIPPETS, 1);
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}
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UnifiedHighlighter highlighter = getHighlighter(req);
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Map<String, String[]> snippets = highlighter.highlightFields(fieldNames, query, docIDs, maxPassages);
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return encodeSnippets(keys, fieldNames, snippets);
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}
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/**
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* Creates an instance of the Lucene {@link UnifiedHighlighter}. Provided for subclass extension so that
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* a subclass can return a subclass of {@link SolrExtendedUnifiedHighlighter}.
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*/
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protected UnifiedHighlighter getHighlighter(SolrQueryRequest req) {
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return new SolrExtendedUnifiedHighlighter(req);
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}
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/**
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* Encodes the resulting snippets into a namedlist
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*
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* @param keys the document unique keys
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* @param fieldNames field names to highlight in the order
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* @param snippets map from field name to snippet array for the docs
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* @return encoded namedlist of summaries
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*/
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protected NamedList<Object> encodeSnippets(String[] keys, String[] fieldNames, Map<String, String[]> snippets) {
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NamedList<Object> list = new SimpleOrderedMap<>();
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for (int i = 0; i < keys.length; i++) {
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NamedList<Object> summary = new SimpleOrderedMap<>();
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for (String field : fieldNames) {
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String snippet = snippets.get(field)[i];
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if (snippet == null) {
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//TODO reuse logic of DefaultSolrHighlighter.alternateField
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summary.add(field, ZERO_LEN_STR_ARRAY);
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} else {
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// we used a special snippet separator char and we can now split on it.
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summary.add(field, snippet.split(SNIPPET_SEPARATOR));
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}
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}
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list.add(keys[i], summary);
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}
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return list;
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}
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/**
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* Converts solr's DocList to the int[] docIDs
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*/
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protected int[] toDocIDs(DocList docs) {
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int[] docIDs = new int[docs.size()];
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DocIterator iterator = docs.iterator();
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for (int i = 0; i < docIDs.length; i++) {
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if (!iterator.hasNext()) {
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throw new AssertionError();
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}
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docIDs[i] = iterator.nextDoc();
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}
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if (iterator.hasNext()) {
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throw new AssertionError();
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}
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return docIDs;
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}
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/**
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* Retrieves the unique keys for the topdocs to key the results
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*/
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protected String[] getUniqueKeys(SolrIndexSearcher searcher, int[] docIDs) throws IOException {
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IndexSchema schema = searcher.getSchema();
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SchemaField keyField = schema.getUniqueKeyField();
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if (keyField != null) {
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Set<String> selector = Collections.singleton(keyField.getName());
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String[] uniqueKeys = new String[docIDs.length];
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for (int i = 0; i < docIDs.length; i++) {
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int docid = docIDs[i];
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Document doc = searcher.doc(docid, selector);
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String id = schema.printableUniqueKey(doc);
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uniqueKeys[i] = id;
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}
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return uniqueKeys;
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/**
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* Encodes the resulting snippets into a namedlist
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*
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* @param keys the document unique keys
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* @param fieldNames field names to highlight in the order
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* @param snippets map from field name to snippet array for the docs
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* @return encoded namedlist of summaries
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*/
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protected NamedList<Object> encodeSnippets(String[] keys, String[] fieldNames, Map<String, String[]> snippets) {
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NamedList<Object> list = new SimpleOrderedMap<>();
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for (int i = 0; i < keys.length; i++) {
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NamedList<Object> summary = new SimpleOrderedMap<>();
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for (String field : fieldNames) {
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String snippet = snippets.get(field)[i];
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if (snippet == null) {
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//TODO reuse logic of DefaultSolrHighlighter.alternateField
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summary.add(field, ZERO_LEN_STR_ARRAY);
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} else {
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return new String[docIDs.length];
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// we used a special snippet separator char and we can now split on it.
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summary.add(field, snippet.split(SNIPPET_SEPARATOR));
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}
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}
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list.add(keys[i], summary);
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}
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return list;
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}
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/**
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* Converts solr's DocList to the int[] docIDs
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*/
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protected int[] toDocIDs(DocList docs) {
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int[] docIDs = new int[docs.size()];
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DocIterator iterator = docs.iterator();
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for (int i = 0; i < docIDs.length; i++) {
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if (!iterator.hasNext()) {
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throw new AssertionError();
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}
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docIDs[i] = iterator.nextDoc();
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}
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if (iterator.hasNext()) {
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throw new AssertionError();
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}
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return docIDs;
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}
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/**
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* Retrieves the unique keys for the topdocs to key the results
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*/
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protected String[] getUniqueKeys(SolrIndexSearcher searcher, int[] docIDs) throws IOException {
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IndexSchema schema = searcher.getSchema();
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SchemaField keyField = schema.getUniqueKeyField();
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if (keyField != null) {
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Set<String> selector = Collections.singleton(keyField.getName());
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String[] uniqueKeys = new String[docIDs.length];
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for (int i = 0; i < docIDs.length; i++) {
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int docid = docIDs[i];
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Document doc = searcher.doc(docid, selector);
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String id = schema.printableUniqueKey(doc);
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uniqueKeys[i] = id;
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}
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return uniqueKeys;
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} else {
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return new String[docIDs.length];
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}
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}
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/**
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* From {@link #getHighlighter(org.apache.solr.request.SolrQueryRequest)}.
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*/
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protected static class SolrExtendedUnifiedHighlighter extends UnifiedHighlighter {
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protected final SolrParams params;
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protected final IndexSchema schema;
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protected final RTimerTree loadFieldValuesTimer;
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public SolrExtendedUnifiedHighlighter(SolrQueryRequest req) {
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super(req.getSearcher(), req.getSchema().getIndexAnalyzer());
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this.params = req.getParams();
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this.schema = req.getSchema();
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this.setMaxLength(
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params.getInt(HighlightParams.MAX_CHARS, UnifiedHighlighter.DEFAULT_MAX_LENGTH));
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this.setCacheFieldValCharsThreshold(
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params.getInt(HighlightParams.CACHE_FIELD_VAL_CHARS_THRESHOLD, DEFAULT_CACHE_CHARS_THRESHOLD));
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// SolrRequestInfo is a thread-local singleton providing access to the ResponseBuilder to code that
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// otherwise can't get it in a nicer way.
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SolrQueryRequest request = SolrRequestInfo.getRequestInfo().getReq();
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final RTimerTree timerTree;
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if (request.getRequestTimer() != null) { //It may be null if not used in a search context.
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timerTree = request.getRequestTimer();
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} else {
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timerTree = new RTimerTree(); // since null checks are annoying
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}
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loadFieldValuesTimer = timerTree.sub("loadFieldValues"); // we assume a new timer, state of STARTED
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loadFieldValuesTimer.pause(); // state of PAUSED now with about zero time. Will fail if state isn't STARTED.
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}
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@Override
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protected OffsetSource getOffsetSource(String field) {
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String sourceStr = params.getFieldParam(field, HighlightParams.OFFSET_SOURCE);
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if (sourceStr != null) {
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return OffsetSource.valueOf(sourceStr.toUpperCase(Locale.ROOT));
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} else {
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return super.getOffsetSource(field);
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}
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}
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@Override
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public int getMaxNoHighlightPassages(String field) {
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boolean defaultSummary = params.getFieldBool(field, HighlightParams.DEFAULT_SUMMARY, false);
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if (defaultSummary) {
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return -1;// signifies return first hl.snippets passages worth of the content
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} else {
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return 0;// will return null
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}
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}
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@Override
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protected PassageFormatter getFormatter(String fieldName) {
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String preTag = params.getFieldParam(fieldName, HighlightParams.TAG_PRE,
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params.getFieldParam(fieldName, HighlightParams.SIMPLE_PRE, "<em>")
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);
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String postTag = params.getFieldParam(fieldName, HighlightParams.TAG_POST,
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params.getFieldParam(fieldName, HighlightParams.SIMPLE_POST, "</em>")
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);
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String ellipsis = params.getFieldParam(fieldName, HighlightParams.TAG_ELLIPSIS, SNIPPET_SEPARATOR);
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String encoder = params.getFieldParam(fieldName, HighlightParams.ENCODER, "simple");
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return new DefaultPassageFormatter(preTag, postTag, ellipsis, "html".equals(encoder));
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}
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@Override
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protected PassageScorer getScorer(String fieldName) {
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float k1 = params.getFieldFloat(fieldName, HighlightParams.SCORE_K1, 1.2f);
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float b = params.getFieldFloat(fieldName, HighlightParams.SCORE_B, 0.75f);
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float pivot = params.getFieldFloat(fieldName, HighlightParams.SCORE_PIVOT, 87f);
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return new PassageScorer(k1, b, pivot);
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}
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@Override
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protected BreakIterator getBreakIterator(String field) {
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String language = params.getFieldParam(field, HighlightParams.BS_LANGUAGE);
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String country = params.getFieldParam(field, HighlightParams.BS_COUNTRY);
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String variant = params.getFieldParam(field, HighlightParams.BS_VARIANT);
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Locale locale = parseLocale(language, country, variant);
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String type = params.getFieldParam(field, HighlightParams.BS_TYPE);
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return parseBreakIterator(type, locale);
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}
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/**
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* From {@link #getHighlighter(org.apache.solr.request.SolrQueryRequest)}.
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* parse a break iterator type for the specified locale
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*/
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protected static class SolrExtendedUnifiedHighlighter extends UnifiedHighlighter {
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protected final SolrParams params;
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protected final IndexSchema schema;
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protected final RTimerTree loadFieldValuesTimer;
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public SolrExtendedUnifiedHighlighter(SolrQueryRequest req) {
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super(req.getSearcher(), req.getSchema().getIndexAnalyzer());
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this.params = req.getParams();
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this.schema = req.getSchema();
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this.setMaxLength(
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params.getInt(HighlightParams.MAX_CHARS, UnifiedHighlighter.DEFAULT_MAX_LENGTH));
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this.setCacheFieldValCharsThreshold(
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params.getInt(HighlightParams.CACHE_FIELD_VAL_CHARS_THRESHOLD, DEFAULT_CACHE_CHARS_THRESHOLD));
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// SolrRequestInfo is a thread-local singleton providing access to the ResponseBuilder to code that
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// otherwise can't get it in a nicer way.
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SolrQueryRequest request = SolrRequestInfo.getRequestInfo().getReq();
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final RTimerTree timerTree;
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if (request.getRequestTimer() != null) { //It may be null if not used in a search context.
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timerTree = request.getRequestTimer();
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} else {
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timerTree = new RTimerTree(); // since null checks are annoying
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}
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loadFieldValuesTimer = timerTree.sub("loadFieldValues"); // we assume a new timer, state of STARTED
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loadFieldValuesTimer.pause(); // state of PAUSED now with about zero time. Will fail if state isn't STARTED.
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}
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@Override
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protected OffsetSource getOffsetSource(String field) {
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String sourceStr = params.getFieldParam(field, HighlightParams.OFFSET_SOURCE);
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if (sourceStr != null) {
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return OffsetSource.valueOf(sourceStr.toUpperCase(Locale.ROOT));
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} else {
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return super.getOffsetSource(field);
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}
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}
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@Override
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public int getMaxNoHighlightPassages(String field) {
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boolean defaultSummary = params.getFieldBool(field, HighlightParams.DEFAULT_SUMMARY, false);
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if (defaultSummary) {
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return -1;// signifies return first hl.snippets passages worth of the content
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} else {
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return 0;// will return null
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}
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}
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@Override
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protected PassageFormatter getFormatter(String fieldName) {
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String preTag = params.getFieldParam(fieldName, HighlightParams.TAG_PRE,
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params.getFieldParam(fieldName, HighlightParams.SIMPLE_PRE, "<em>")
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);
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String postTag = params.getFieldParam(fieldName, HighlightParams.TAG_POST,
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params.getFieldParam(fieldName, HighlightParams.SIMPLE_POST, "</em>")
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);
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String ellipsis = params.getFieldParam(fieldName, HighlightParams.TAG_ELLIPSIS, SNIPPET_SEPARATOR);
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String encoder = params.getFieldParam(fieldName, HighlightParams.ENCODER, "simple");
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return new DefaultPassageFormatter(preTag, postTag, ellipsis, "html".equals(encoder));
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}
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@Override
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protected PassageScorer getScorer(String fieldName) {
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float k1 = params.getFieldFloat(fieldName, HighlightParams.SCORE_K1, 1.2f);
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float b = params.getFieldFloat(fieldName, HighlightParams.SCORE_B, 0.75f);
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float pivot = params.getFieldFloat(fieldName, HighlightParams.SCORE_PIVOT, 87f);
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return new PassageScorer(k1, b, pivot);
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}
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@Override
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protected BreakIterator getBreakIterator(String field) {
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String language = params.getFieldParam(field, HighlightParams.BS_LANGUAGE);
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String country = params.getFieldParam(field, HighlightParams.BS_COUNTRY);
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String variant = params.getFieldParam(field, HighlightParams.BS_VARIANT);
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Locale locale = parseLocale(language, country, variant);
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String type = params.getFieldParam(field, HighlightParams.BS_TYPE);
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return parseBreakIterator(type, locale);
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}
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/**
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* parse a break iterator type for the specified locale
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*/
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protected BreakIterator parseBreakIterator(String type, Locale locale) {
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if (type == null || "SENTENCE".equals(type)) {
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return BreakIterator.getSentenceInstance(locale);
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} else if ("LINE".equals(type)) {
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return BreakIterator.getLineInstance(locale);
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} else if ("WORD".equals(type)) {
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return BreakIterator.getWordInstance(locale);
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} else if ("CHARACTER".equals(type)) {
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return BreakIterator.getCharacterInstance(locale);
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} else if ("WHOLE".equals(type)) {
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return new WholeBreakIterator();
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} else {
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throw new IllegalArgumentException("Unknown " + HighlightParams.BS_TYPE + ": " + type);
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}
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}
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/**
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* parse a locale from a language+country+variant spec
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*/
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protected Locale parseLocale(String language, String country, String variant) {
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if (language == null && country == null && variant == null) {
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return Locale.ROOT;
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} else if (language == null) {
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throw new IllegalArgumentException("language is required if country or variant is specified");
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} else if (country == null && variant != null) {
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throw new IllegalArgumentException("To specify variant, country is required");
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} else if (country != null && variant != null) {
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return new Locale(language, country, variant);
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} else if (country != null) {
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return new Locale(language, country);
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} else {
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return new Locale(language);
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}
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}
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@Override
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protected List<CharSequence[]> loadFieldValues(String[] fields, DocIdSetIterator docIter, int
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cacheCharsThreshold) throws IOException {
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// Time loading field values. It can be an expensive part of highlighting.
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loadFieldValuesTimer.resume();
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try {
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return super.loadFieldValues(fields, docIter, cacheCharsThreshold);
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} finally {
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loadFieldValuesTimer.pause(); // note: doesn't need to be "stopped"; pause is fine.
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}
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}
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@Override
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protected boolean shouldHandleMultiTermQuery(String field) {
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return params.getFieldBool(field, HighlightParams.HIGHLIGHT_MULTI_TERM, true);
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}
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@Override
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protected boolean shouldHighlightPhrasesStrictly(String field) {
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return params.getFieldBool(field, HighlightParams.USE_PHRASE_HIGHLIGHTER, true);
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}
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protected BreakIterator parseBreakIterator(String type, Locale locale) {
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if (type == null || "SENTENCE".equals(type)) {
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return BreakIterator.getSentenceInstance(locale);
|
||||
} else if ("LINE".equals(type)) {
|
||||
return BreakIterator.getLineInstance(locale);
|
||||
} else if ("WORD".equals(type)) {
|
||||
return BreakIterator.getWordInstance(locale);
|
||||
} else if ("CHARACTER".equals(type)) {
|
||||
return BreakIterator.getCharacterInstance(locale);
|
||||
} else if ("WHOLE".equals(type)) {
|
||||
return new WholeBreakIterator();
|
||||
} else {
|
||||
throw new IllegalArgumentException("Unknown " + HighlightParams.BS_TYPE + ": " + type);
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* parse a locale from a language+country+variant spec
|
||||
*/
|
||||
protected Locale parseLocale(String language, String country, String variant) {
|
||||
if (language == null && country == null && variant == null) {
|
||||
return Locale.ROOT;
|
||||
} else if (language == null) {
|
||||
throw new IllegalArgumentException("language is required if country or variant is specified");
|
||||
} else if (country == null && variant != null) {
|
||||
throw new IllegalArgumentException("To specify variant, country is required");
|
||||
} else if (country != null && variant != null) {
|
||||
return new Locale(language, country, variant);
|
||||
} else if (country != null) {
|
||||
return new Locale(language, country);
|
||||
} else {
|
||||
return new Locale(language);
|
||||
}
|
||||
}
|
||||
|
||||
@Override
|
||||
protected List<CharSequence[]> loadFieldValues(String[] fields, DocIdSetIterator docIter, int
|
||||
cacheCharsThreshold) throws IOException {
|
||||
// Time loading field values. It can be an expensive part of highlighting.
|
||||
loadFieldValuesTimer.resume();
|
||||
try {
|
||||
return super.loadFieldValues(fields, docIter, cacheCharsThreshold);
|
||||
} finally {
|
||||
loadFieldValuesTimer.pause(); // note: doesn't need to be "stopped"; pause is fine.
|
||||
}
|
||||
}
|
||||
|
||||
@Override
|
||||
protected boolean shouldHandleMultiTermQuery(String field) {
|
||||
return params.getFieldBool(field, HighlightParams.HIGHLIGHT_MULTI_TERM, true);
|
||||
}
|
||||
|
||||
@Override
|
||||
protected boolean shouldHighlightPhrasesStrictly(String field) {
|
||||
return params.getFieldBool(field, HighlightParams.USE_PHRASE_HIGHLIGHTER, true);
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
}
|
||||
Loading…
Reference in New Issue