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// Copyright 2017 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.demo;
import com.yahoo.search.Result;
import com.yahoo.search.rendering.Renderer;
import com.yahoo.search.result.Hit;
import com.yahoo.search.result.HitGroup;
import java.io.IOException;
import java.io.Writer;
import java.util.Iterator;
/**
* Render result sets as plain text. First line is whether an error occurred,
* second rendering initialization time stamp, then each line is the ID of each
* document returned, and the last line is time stamp for when the renderer was
* finished.
*/
public class DemoRenderer extends Renderer {
private String heading;
/**
* No global, shared state to set.
*/
public DemoRenderer() {
}
@Override
protected void render(Writer writer, Result result) throws IOException {
if (result.hits().getErrorHit() == null) {
writer.write("OK\n");
} else {
writer.write("Oops!\n");
}
writer.write(heading);
writer.write("\n");
renderHits(writer, result.hits());
writer.write("Rendering finished work: " + System.currentTimeMillis());
writer.write("\n");
}
private void renderHits(Writer writer, HitGroup hits) throws IOException {
for (Iterator<Hit> i = hits.deepIterator(); i.hasNext();) {
Hit h = i.next();
if (h.types().contains("summary")) {
String id = h.getDisplayId();
if (id != null) {
writer.write(id);
writer.write("\n");
}
}
}
}
@Override
public String getEncoding() {
return "utf-8";
}
@Override
public String getMimeType() {
return "text/plain";
}
/**
* Initialize mutable, per-result set state here.
*/
@Override
public void init() {
long time = System.currentTimeMillis();
heading = "Renderer initialized: " + time;
}
}
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