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package org.jvnet.hk2.config.generator;
import com.sun.codemodel.JBlock;
import com.sun.codemodel.JExpression;
import com.sun.codemodel.JVar;
import org.jvnet.hk2.config.Attribute;
import org.jvnet.hk2.config.Dom;
import org.jvnet.hk2.config.Element;
import javax.lang.model.element.ExecutableElement;
import javax.lang.model.element.VariableElement;
import javax.lang.model.type.TypeMirror;
import java.lang.annotation.Annotation;
/**
* Represents configurable property of the component.
*
* @author Kohsuke Kawaguchi
*/
abstract class Property {
/**
* Field/method declaration of this property.
* Used to read annotations on this property.
*/
abstract javax.lang.model.element.Element decl();
/**
* Name used as a seed for the XML name of this property.
* This is the property name / field name.
*/
String seedName() {
return decl().getSimpleName().toString();
}
/**
* The type of the property.
*/
abstract TypeMirror type();
abstract void assign(JVar $target, JBlock block, JExpression rhs);
<A extends Annotation> A getAnnotation(Class<A> a) {
return decl().getAnnotation(a);
}
private Boolean isKey=null;
/**
* Does this property have {@link Attribute#key()} or {@link Element#key()}.
*/
final boolean isKey() {
if(isKey==null)
isKey = _isKey();
return isKey;
}
private boolean _isKey() {
Element e = getAnnotation(Element.class);
if(e!=null && e.key()) return true;
Attribute a = getAnnotation(Attribute.class);
return a != null && a.key();
}
String inferName(String name) {
if(name.length()==0)
name = Dom.convertName(seedName());
return name;
}
/**
* Property that consists of a set/add/get method.
*/
static final class Method extends Property {
final ExecutableElement method;
/**
* True if this property is based on the getter method. False if the setter/adder.
*/
final boolean getter;
public Method(ExecutableElement method) {
this.method = method;
getter = !method.getReturnType().toString().equals("void");
}
javax.lang.model.element.Element decl() {
return method;
}
TypeMirror type() {
if(getter)
return method.getReturnType();
else
return method.getParameters().iterator().next().asType();
}
void assign(JVar $target, JBlock block, JExpression rhs) {
block.invoke($target, method.getSimpleName().toString()).arg(rhs);
}
}
/**
* Property that consists of a field.
*/
static final class Field extends Property {
final VariableElement field;
public Field(VariableElement field) {
this.field = field;
}
javax.lang.model.element.Element decl() {
return field;
}
TypeMirror type() {
return field.asType();
}
void assign(JVar $target, JBlock block, JExpression rhs) {
block.assign($target.ref(field.getSimpleName().toString()), rhs);
}
}
}