在这个例子中 DateSplitBridge.java 动态字段被添加到索引文档中:
In this example DateSplitBridge.java dynamic fields are added to indexed document:
public class DateSplitBridge implements FieldBridge {
...
public void set(String name, Object value, Document document, LuceneOptions luceneOptions) {
...
luceneOptions.addFieldToDocument( name + ".year", String.valueOf( year ), document);
...
如何为此类临时字段配置 Facet?可以在 FieldBridge 本身中完成吗?
How do I configure Facet for such ad hoc fields? Can it be done in FieldBridge itself?
在 https://hibernate.atlassian.net/browse/HSEARCH-1686?page=com.atlassian.jira.plugin.system.issuetabpanels%3Acomment-tabpanel&showAll=true
这里采用的版本:companyId是实体成员(Long),isFavorite也是成员(布尔).结果:在索引文档中有类似的字段:customFieldFacet_1234,其值为:true"或false".注意:没有@Facet注解
Here is adopted version: companyId is entity member (Long), isFavorite also member (Boolean). As result: in the indexed document there are fields like: customFieldFacet_1234 with values: "true" or "false". Note: there is no @Facet annotation
用法:
@Field(analyze = Analyze.NO, store = Store.YES, bridge = @FieldBridge(impl = CustomFieldBridge.class))
@Transient
public CustomField getFacetingCustomField() {
return new CustomField("customFieldFacet_" + companyId, isFavorite);
}
场桥:
import org.apache.lucene.document.Document;
import org.apache.lucene.facet.sortedset.SortedSetDocValuesFacetField;
import org.hibernate.search.bridge.FieldBridge;
import org.hibernate.search.bridge.LuceneOptions;
import java.io.IOException;
public class CustomFieldBridge implements FieldBridge {
public void set(String name, Object value, Document document, LuceneOptions luceneOptions) {
if (value != null) {
CustomField customField = (CustomField) value;
if (customField.getFieldValue() != null) {
String fieldName = customField.getFieldName();
String fieldValue = customField.getFieldValue();
CustomFacetsConfig config = new CustomFacetsConfig();
config.setIndexFieldName(fieldName, fieldName);
Document doc = new Document();
doc.add(new SortedSetDocValuesFacetField(fieldName, fieldValue));
try {
config.CustomBuild(doc, document);
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
}
CustomFacetConfig:
CustomFacetConfig:
import org.apache.lucene.document.Document;
import org.apache.lucene.document.Field;
import org.apache.lucene.document.SortedSetDocValuesField;
import org.apache.lucene.document.StringField;
import org.apache.lucene.facet.FacetsConfig;
import org.apache.lucene.facet.sortedset.SortedSetDocValuesFacetField;
import org.apache.lucene.facet.taxonomy.FacetLabel;
import org.apache.lucene.index.IndexableField;
import org.apache.lucene.util.BytesRef;
import java.io.IOException;
import java.util.*;
public class CustomFacetsConfig extends FacetsConfig {
public Document CustomBuild(Document doc, Document destDocument) throws IOException {
Map<String, List<SortedSetDocValuesFacetField>> dvByField = new HashMap<>();
Set<String> seenDims = new HashSet<>();
for (IndexableField field : doc.getFields()) {
if (field.fieldType() == SortedSetDocValuesFacetField.TYPE) {
SortedSetDocValuesFacetField facetField = (SortedSetDocValuesFacetField) field;
FacetsConfig.DimConfig dimConfig = getDimConfig(facetField.dim);
if (dimConfig.multiValued == false) {
checkSeen(seenDims, facetField.dim);
}
String indexFieldName = dimConfig.indexFieldName;
List<SortedSetDocValuesFacetField> fields = dvByField.get(indexFieldName);
if (fields == null) {
fields = new ArrayList<>();
dvByField.put(indexFieldName, fields);
}
fields.add(facetField);
}
}
processSSDVFacetFields(dvByField, destDocument);
return destDocument;
}
private void checkSeen(Set<String> seenDims, String dim) {
if (seenDims.contains(dim)) {
throw new IllegalArgumentException("dimension " + dim + " is not multiValued, but it appears more than once in this document");
}
seenDims.add(dim);
}
private void processSSDVFacetFields(Map<String, List<SortedSetDocValuesFacetField>> byField, Document doc) throws IOException {
for (Map.Entry<String, List<SortedSetDocValuesFacetField>> ent : byField.entrySet()) {
String indexFieldName = ent.getKey();
for (SortedSetDocValuesFacetField facetField : ent.getValue()) {
FacetLabel cp = new FacetLabel(facetField.dim, facetField.label);
String fullPath = pathToString(cp.components, cp.length);
doc.add(new SortedSetDocValuesField(indexFieldName, new BytesRef(fullPath)));
doc.add(new StringField(indexFieldName, fullPath, Field.Store.YES));
}
}
}
}
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