noopresulthighlighter.java

esri的ArcGIS Server超级学习模板程序（for java）

package com.esri.solutions.jitk.web.data.results.highlight;

import com.esri.adf.web.data.query.QueryResult;
import com.esri.adf.web.data.query.WebQuery;

import org.apache.log4j.Logger;

import java.util.List;


public class NOOPResultHighlighter implements IResultHighlighter {
    private static Logger _logger = Logger.getLogger(NOOPResultHighlighter.class);
    private boolean _clearPrevious = true;
    
    public boolean getClearPreviousResults() {
        return _clearPrevious;
    }

    public void highlightResults(List<QueryResult> results) {
        _logger.debug("NOOP highlighter called, no highlighting will take place");

        if (results == null) {
            throw new NullPointerException("Results cannot be null");
        }
        
        QueryResult qResult = results.get(0);
        
        if (qResult == null) {
        	_logger.warn("QueryResult list is empty");
        	return;
        }
        
        WebQuery webQuery = qResult.getWebQuery();        
        
        if (_clearPrevious) {
            webQuery.clearGraphics();
        }
    }

    public void setClearPreviousResults(boolean clear) {
    	_clearPrevious = clear;
    }
}