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server/zanata-model/src/main/java/org/zanata/hibernate/search/StringListBridge.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,97 @@ | ||
| package org.zanata.hibernate.search; | ||
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| import java.io.IOException; | ||
| import java.io.StringReader; | ||
| import java.util.List; | ||
| import java.util.Map; | ||
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| import org.apache.lucene.document.Document; | ||
| import org.apache.lucene.document.Field; | ||
| import org.hibernate.search.bridge.FieldBridge; | ||
| import org.hibernate.search.bridge.LuceneOptions; | ||
| import org.hibernate.search.bridge.ParameterizedBridge; | ||
| import org.jboss.seam.annotations.Logger; | ||
| import org.jboss.seam.log.Log; | ||
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| /** | ||
| * Index a list of strings in multiple fields, appending the string index to the | ||
| * field name to produce unique fields. | ||
| * | ||
| * e.g. For a field labeled 'fieldName' for a list of 3 strings | ||
| * <ul> | ||
| * <li>First string is indexed as 'fieldName0'</li> | ||
| * <li>Second string is indexed as 'fieldName1'</li> | ||
| * <li>Third string is indexed as 'fieldName2'</li> | ||
| * </ul> | ||
| * | ||
| * @author David Mason, damason@redhat.com | ||
| * | ||
| */ | ||
| public class StringListBridge implements FieldBridge, ParameterizedBridge | ||
| { | ||
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| @Logger | ||
| Log log; | ||
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| private ConfigurableNgramAnalyzer analyzer; | ||
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| @Override | ||
| public void setParameterValues(@SuppressWarnings("rawtypes") Map parameters) | ||
| { | ||
| if (parameters.containsKey("case")) | ||
| { | ||
| String caseBehaviour = (String) parameters.get("case"); | ||
| if ("fold".equals(caseBehaviour)) | ||
| { | ||
| analyzer = new DefaultNgramAnalyzer(); | ||
| } | ||
| else if ("preserve".equals(caseBehaviour)) | ||
| { | ||
| analyzer = new CaseSensitiveNgramAnalyzer(); | ||
| } | ||
| else | ||
| { | ||
| log.warn("invalid value for parameter \"case\": \"{0}\", default will be used", caseBehaviour); | ||
| analyzer = new DefaultNgramAnalyzer(); | ||
| } | ||
| } | ||
| } | ||
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| @Override | ||
| public void set(String name, Object value, Document luceneDocument, LuceneOptions luceneOptions) | ||
| { | ||
| if (analyzer == null) | ||
| { | ||
| analyzer = new DefaultNgramAnalyzer(); | ||
| } | ||
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| if (!(value instanceof List<?>)) | ||
| { | ||
| throw new IllegalArgumentException("this bridge must be applied to a List"); | ||
| } | ||
| List<String> strings = (List<String>) value; | ||
| for (int i = 0; i < strings.size(); i++) | ||
| { | ||
| addStringField(name + i, strings.get(i), luceneDocument, luceneOptions); | ||
| } | ||
| } | ||
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| private void addStringField(String fieldName, String fieldValue, Document luceneDocument, LuceneOptions luceneOptions) | ||
| { | ||
| Field field = new Field(fieldName, fieldValue, luceneOptions.getStore(), luceneOptions.getIndex(), luceneOptions.getTermVector()); | ||
| field.setBoost(luceneOptions.getBoost()); | ||
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| // manually apply token stream from analyzer, as hibernate search does not | ||
| // apply the specified analyzer properly | ||
| try | ||
| { | ||
| field.setTokenStream(analyzer.reusableTokenStream(fieldName, new StringReader(fieldValue))); | ||
| } | ||
| catch (IOException e) | ||
| { | ||
| log.error("Failed to get token stream from analyzer for field \"{0}\" with content \"{1}\"", e, fieldName, fieldValue); | ||
| } | ||
| luceneDocument.add(field); | ||
| } | ||
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| } |
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