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package lombok.javac.handlers;
import static lombok.javac.handlers.PKG.*;
import lombok.Setter;
import lombok.core.AnnotationValues;
import lombok.core.AST.Kind;
import lombok.javac.JavacAST;
import lombok.javac.JavacAnnotationHandler;
import lombok.javac.JavacAST.Node;
import org.mangosdk.spi.ProviderFor;
import com.sun.tools.javac.tree.TreeMaker;
import com.sun.tools.javac.tree.JCTree.JCAnnotation;
import com.sun.tools.javac.tree.JCTree.JCAssign;
import com.sun.tools.javac.tree.JCTree.JCBlock;
import com.sun.tools.javac.tree.JCTree.JCClassDecl;
import com.sun.tools.javac.tree.JCTree.JCExpression;
import com.sun.tools.javac.tree.JCTree.JCFieldAccess;
import com.sun.tools.javac.tree.JCTree.JCMethodDecl;
import com.sun.tools.javac.tree.JCTree.JCStatement;
import com.sun.tools.javac.tree.JCTree.JCTypeParameter;
import com.sun.tools.javac.tree.JCTree.JCVariableDecl;
import com.sun.tools.javac.util.List;
import com.sun.tools.javac.util.Name;
@ProviderFor(JavacAnnotationHandler.class)
public class HandleSetter implements JavacAnnotationHandler<Setter> {
@Override public void handle(AnnotationValues<Setter> annotation, JCAnnotation ast, Node annotationNode) {
if ( annotationNode.up().getKind() != Kind.FIELD ) {
annotationNode.addError("@Setter is only supported on a field.");
return;
}
JCVariableDecl fieldNode = (JCVariableDecl) annotationNode.up().get();
String methodName = toSetterName(fieldNode);
if ( methodExists(methodName, annotationNode.up()) ) {
annotationNode.addWarning(
String.format("Not generating %s(%s %s): A method with that name already exists",
methodName, fieldNode.vartype, fieldNode.name));
return;
}
Setter setter = annotation.getInstance();
JCClassDecl javacClassTree = (JCClassDecl) annotationNode.up().up().get();
int access = toJavacModifier(setter.value());
JCMethodDecl setterMethod = createSetter(access, annotationNode.up(), annotationNode.getTreeMaker());
javacClassTree.defs = javacClassTree.defs.append(setterMethod);
}
private JCMethodDecl createSetter(int access, JavacAST.Node field, TreeMaker treeMaker) {
JCVariableDecl fieldDecl = (JCVariableDecl) field.get();
JCFieldAccess thisX = treeMaker.Select(treeMaker.Ident(field.toName("this")), fieldDecl.name);
JCAssign assign = treeMaker.Assign(thisX, treeMaker.Ident(fieldDecl.name));
JCBlock methodBody = treeMaker.Block(0, List.<JCStatement>of(treeMaker.Exec(assign)));
Name methodName = field.toName(toSetterName(fieldDecl));
JCVariableDecl param = treeMaker.VarDef(treeMaker.Modifiers(0, List.<JCAnnotation>nil()), fieldDecl.name, fieldDecl.vartype, null);
JCExpression methodType = treeMaker.Type(field.getSymbolTable().voidType);
List<JCTypeParameter> methodGenericParams = List.nil();
List<JCVariableDecl> parameters = List.of(param);
List<JCExpression> throwsClauses = List.nil();
JCExpression annotationMethodDefaultValue = null;
return treeMaker.MethodDef(treeMaker.Modifiers(access, List.<JCAnnotation>nil()), methodName, methodType,
methodGenericParams, parameters, throwsClauses, methodBody, annotationMethodDefaultValue);
}
}
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