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package com.sun.faces.facelets.compiler;
import com.sun.faces.facelets.el.ELText;
import javax.el.ELContext;
import javax.el.ELException;
import javax.el.ExpressionFactory;
import javax.faces.context.FacesContext;
import javax.faces.context.ResponseWriter;
import java.io.IOException;
final class AttributeInstruction implements Instruction {
private final String alias;
private final String attr;
private final ELText txt;
public AttributeInstruction(String alias, String attr, ELText txt) {
this.alias = alias;
this.attr = attr;
this.txt = txt;
}
public void write(FacesContext context) throws IOException {
ResponseWriter out = context.getResponseWriter();
try {
ELContext elContext = context.getELContext();
String val = txt.toString(elContext);
if (val != null && val.length() != 0) {
out.writeAttribute(attr, val, null);
}
} catch (ELException e) {
throw new ELException(this.alias + ": " + e.getMessage(), e.getCause());
} catch (Exception e) {
throw new ELException(this.alias + ": " + e.getMessage(), e);
}
}
public Instruction apply(ExpressionFactory factory, ELContext ctx) {
ELText nt = this.txt.apply(factory, ctx);
if (nt == this.txt) {
return this;
}
return new AttributeInstruction(alias, attr, nt);
}
public boolean isLiteral() {
return txt.isLiteral();
}
}