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LikeThisQueryBuilder.javaAPI DocApache Lucene 1.91863Mon Feb 27 11:12:20 GMT 2006org.apache.lucene.xmlparser.builders

LikeThisQueryBuilder

public class LikeThisQueryBuilder extends Object implements org.apache.lucene.xmlparser.QueryBuilder
author
maharwood

Fields Summary
private Analyzer
analyzer
String[]
defaultFieldNames
int
defaultMaxQueryTerms
int
defaultMinTermFrequency
float
defaultPercentTermsToMatch
Constructors Summary
public LikeThisQueryBuilder(Analyzer analyzer, String[] defaultFieldNames)

 //default is a 3rd of selected terms must match

	    
	
		this.analyzer=analyzer;
		this.defaultFieldNames=defaultFieldNames;
Methods Summary
public org.apache.lucene.search.QuerygetQuery(org.w3c.dom.Element e)

		String fieldsList=e.getAttribute("fieldNames"); //a comma-delimited list of fields
		String fields[]=defaultFieldNames;
		if((fieldsList!=null)&&(fieldsList.trim().length()>0))
		{
			fields=fieldsList.trim().split(",");
			//trim the fieldnames
			for (int i = 0; i < fields.length; i++) {
				fields[i]=fields[i].trim();
			}
		}
		MoreLikeThisQuery mlt=new MoreLikeThisQuery(DOMUtils.getText(e),fields,analyzer);
		mlt.setMaxQueryTerms(DOMUtils.getAttribute(e,"maxQueryTerms",defaultMaxQueryTerms));
		mlt.setMinTermFrequency(DOMUtils.getAttribute(e,"minTermFrequency",defaultMinTermFrequency));
		mlt.setPercentTermsToMatch(DOMUtils.getAttribute(e,"percentTermsToMatch",defaultPercentTermsToMatch)/100);

		mlt.setBoost(DOMUtils.getAttribute(e,"boost",1.0f));

		return mlt;