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package lombok.eclipse.handlers;
import static lombok.eclipse.handlers.PKG.*;
import lombok.AccessLevel;
import lombok.Getter;
import lombok.core.AnnotationValues;
import lombok.core.TransformationsUtil;
import lombok.core.AST.Kind;
import lombok.eclipse.Eclipse;
import lombok.eclipse.EclipseAnnotationHandler;
import lombok.eclipse.EclipseAST.Node;
import org.eclipse.jdt.internal.compiler.ast.ASTNode;
import org.eclipse.jdt.internal.compiler.ast.Annotation;
import org.eclipse.jdt.internal.compiler.ast.Expression;
import org.eclipse.jdt.internal.compiler.ast.FieldDeclaration;
import org.eclipse.jdt.internal.compiler.ast.MethodDeclaration;
import org.eclipse.jdt.internal.compiler.ast.ReturnStatement;
import org.eclipse.jdt.internal.compiler.ast.SingleNameReference;
import org.eclipse.jdt.internal.compiler.ast.Statement;
import org.eclipse.jdt.internal.compiler.ast.TypeDeclaration;
import org.eclipse.jdt.internal.compiler.ast.TypeReference;
import org.eclipse.jdt.internal.compiler.classfmt.ClassFileConstants;
import org.mangosdk.spi.ProviderFor;
@ProviderFor(EclipseAnnotationHandler.class)
public class HandleGetter implements EclipseAnnotationHandler<Getter> {
public void generateGetterForField(Node fieldNode, ASTNode pos) {
AccessLevel level = AccessLevel.PUBLIC;
Node errorNode = fieldNode;
boolean whineIfExists = false;
for ( Node child : fieldNode.down() ) {
if ( child.getKind() == Kind.ANNOTATION ) {
if ( Eclipse.annotationTypeMatches(Getter.class, child) ) {
level = Eclipse.createAnnotation(Getter.class, child).getInstance().value();
errorNode = child;
pos = child.get();
whineIfExists = true;
break;
}
}
}
createGetterForField(level, fieldNode, errorNode, pos, whineIfExists);
}
@Override public boolean handle(AnnotationValues<Getter> annotation, Annotation ast, Node annotationNode) {
Node fieldNode = annotationNode.up();
AccessLevel level = annotation.getInstance().value();
return createGetterForField(level, fieldNode, annotationNode, annotationNode.get(), true);
}
private boolean createGetterForField(AccessLevel level, Node fieldNode, Node errorNode, ASTNode pos, boolean whineIfExists) {
if ( fieldNode.getKind() != Kind.FIELD ) {
errorNode.addError("@Getter is only supported on a field.");
return false;
}
FieldDeclaration field = (FieldDeclaration) fieldNode.get();
TypeReference fieldType = Eclipse.copyType(field.type);
String getterName = TransformationsUtil.toGetterName(
new String(field.name), nameEquals(fieldType.getTypeName(), "boolean"));
int modifier = toModifier(level) | (field.modifiers & ClassFileConstants.AccStatic);
switch ( methodExists(getterName, fieldNode) ) {
case EXISTS_BY_LOMBOK:
return true;
case EXISTS_BY_USER:
if ( whineIfExists ) errorNode.addWarning(
String.format("Not generating %s(): A method with that name already exists", getterName));
return false;
default:
case NOT_EXISTS:
//continue with creating the getter
}
MethodDeclaration method = generateGetter((TypeDeclaration) fieldNode.up().get(), field, getterName, modifier, pos);
injectMethod(fieldNode.up(), method);
return true;
}
private MethodDeclaration generateGetter(TypeDeclaration parent, FieldDeclaration field, String name,
int modifier, ASTNode pos) {
MethodDeclaration method = new MethodDeclaration(parent.compilationResult);
method.modifiers = modifier;
method.returnType = Eclipse.copyType(field.type);
method.annotations = null;
method.arguments = null;
method.selector = name.toCharArray();
method.binding = null;
method.thrownExceptions = null;
method.typeParameters = null;
method.bits |= Eclipse.ECLIPSE_DO_NOT_TOUCH_FLAG;
Expression fieldExpression = new SingleNameReference(field.name, (field.declarationSourceStart << 32) | field.declarationSourceEnd);
Statement returnStatement = new ReturnStatement(fieldExpression, field.sourceStart, field.sourceEnd);
method.bodyStart = method.declarationSourceStart = method.sourceStart = pos.sourceStart;
method.bodyEnd = method.declarationSourceEnd = method.sourceEnd = pos.sourceEnd;
method.statements = new Statement[] { returnStatement };
return method;
}
}
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