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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.searchlib.rankingexpression.evaluation;
import java.util.ArrayList;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
/**
* Reports the result of optimizations of a ranking expression.
*
* @author bratseth
*/
public class OptimizationReport {
private Map<String,Integer> metrics=new LinkedHashMap<String,Integer>();
private List<String> notes=new ArrayList<String>();
public void setMetric(String name,int value) {
metrics.put(name,value);
}
/** Returns the value of a metric, or null if it is not set */
public int getMetric(String name) {
return metrics.get(name);
}
/**
* Increases the metric by the given name by increment, if the metric is not previously set,
* this will assign it the value increment as expected
*/
public void incMetric(String name,int increment) {
Integer currentValue=metrics.get(name);
if (currentValue==null)
currentValue=0;
metrics.put(name,currentValue+increment);
}
public void note(String note) {
notes.add(note);
}
/** Returns all the content of this report as a multiline string */
public String toString() {
StringBuilder b=new StringBuilder();
if (notes.size()>0) {
b.append("Optimization notes:\n");
List<String> displayedNotes=notes.subList(0,Math.min(5,notes.size()));
for (String note : displayedNotes)
b.append(" ").append(note).append("\n");
if (notes.size()>displayedNotes.size())
b.append(" ...\n");
}
b.append("Optimization metrics:\n");
for (Map.Entry<String,Integer> metric : metrics.entrySet())
b.append(" " + metric.getKey() + ": " + metric.getValue() + "\n");
return b.toString();
}
}
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