org.openapitools.codegen.templating.mustache.OnChangeLambda Maven / Gradle / Ivy
package org.openapitools.codegen.templating.mustache;
import java.io.IOException;
import java.io.Writer;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.samskivert.mustache.Mustache;
import com.samskivert.mustache.Template;
/**
* Lambda writes current fragment to the output when it is different than
* the previous fragment.
*
* Register:
*
* additionalProperties.put("onchange", new OnChangeLambda());
*
*
* Use:
*
* {{#onchange}}{{name}}{{/onchange}}
*
*/
public class OnChangeLambda implements Mustache.Lambda {
private static final Logger LOGGER = LoggerFactory.getLogger(OnChangeLambda.class);
private String lastVal = null;
@Override
public void execute(Template.Fragment frag, Writer out) throws IOException {
String curVal = frag.execute();
LOGGER.debug("[lastVal={}, curVal={}]", lastVal, curVal);
if (curVal != null && !curVal.equals(lastVal)) {
out.write(curVal);
lastVal = curVal;
}
}
}
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