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package lombok.javac.handlers;
import static lombok.javac.handlers.PKG.*;
import lombok.Getter;
import lombok.core.AnnotationValues;
import lombok.core.AST.Kind;
import lombok.javac.JavacAnnotationHandler;
import lombok.javac.JavacAST;
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.JCBlock;
import com.sun.tools.javac.tree.JCTree.JCClassDecl;
import com.sun.tools.javac.tree.JCTree.JCExpression;
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 HandleGetter implements JavacAnnotationHandler<Getter> {
@Override public boolean handle(AnnotationValues<Getter> annotation, JCAnnotation ast, JavacAST.Node annotationNode) {
if ( annotationNode.up().getKind() != Kind.FIELD ) {
annotationNode.addError("@Getter is only supported on a field.");
return false;
}
String methodName = toGetterName((JCVariableDecl) annotationNode.up().get());
if ( methodExists(methodName, annotationNode.up()) ) {
annotationNode.addWarning(
String.format("Not generating %s(): A method with that name already exists", methodName));
return false;
}
Getter getter = annotation.getInstance();
JCClassDecl javacClassTree = (JCClassDecl) annotationNode.up().up().get();
int access = toJavacModifier(getter.value());
JCMethodDecl getterMethod = createGetter(access, annotationNode.up(), annotationNode.getTreeMaker());
javacClassTree.defs = javacClassTree.defs.append(getterMethod);
return true;
}
private JCMethodDecl createGetter(int access, JavacAST.Node field, TreeMaker treeMaker) {
JCVariableDecl fieldNode = (JCVariableDecl) field.get();
JCStatement returnStatement = treeMaker.Return(treeMaker.Ident(fieldNode.getName()));
JCBlock methodBody = treeMaker.Block(0, List.of(returnStatement));
Name methodName = field.toName(toGetterName(fieldNode));
JCExpression methodType = fieldNode.type != null ? treeMaker.Type(fieldNode.type) : fieldNode.vartype;
List<JCTypeParameter> methodGenericParams = List.nil();
List<JCVariableDecl> parameters = List.nil();
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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