com.disney.groovity.tags.If Maven / Gradle / Ivy
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*
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package com.disney.groovity.tags;
import groovy.lang.Closure;
import java.util.Map;
import org.codehaus.groovy.runtime.typehandling.DefaultTypeTransformation;
import com.disney.groovity.Taggable;
import com.disney.groovity.doc.Attr;
import com.disney.groovity.doc.Tag;
/**
* Logical if tag controls whether the body expression is executed
*
* if(
* - test:
* an expression that evaluates to true or false,
*
{
* // Code to execute when the test expression evaluates to true
* });
*
* Sample
*
* <g:if test="${i % 2 == 0}">
* ${i},
* </g:if>
*
*
* @author Alex Vigdor
*/
@Tag(
info = "Logical if tag controls whether the body expression is executed",
body = "Code to execute when the test expression evaluates to true",
sample="\n" +
"\t${i},\n" +
" ",
attrs = {
@Attr(
name = "test",
info="an expression that evaluates to true or false",
required = true
)
}
)
public class If implements Taggable{
@SuppressWarnings("rawtypes")
public Object tag(Map attributes, Closure body) {
Object test = resolve(attributes,"test");
if(!(test instanceof Boolean)){
test = DefaultTypeTransformation.castToBoolean(test);
}
try{
if(((Boolean)test).booleanValue()){
return body.call();
}
}
finally{
bind(body,"lastIfTagEvaluationResult", test);
}
return null;
}
}