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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.AbstractMethodDeclaration;
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.eclipse.jdt.internal.compiler.lookup.MethodScope;
import org.mangosdk.spi.ProviderFor;
@ProviderFor(EclipseAnnotationHandler.class)
public class HandleGetter implements EclipseAnnotationHandler<Getter> {
public void generateGetterForField(Node fieldNode, ASTNode pos) {
AccessLevel level = Getter.DEFAULT_ACCESS_LEVEL;
Node errorNode = fieldNode;
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();
break;
}
}
}
createGetterForField(level, fieldNode, errorNode, pos);
}
@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());
}
private boolean createGetterForField(AccessLevel level, Node fieldNode, Node errorNode, ASTNode pos) {
if ( fieldNode.getKind() != Kind.FIELD ) {
errorNode.addError("@Getter is only supported on a field.");
return false;
}
FieldDeclaration field = (FieldDeclaration) fieldNode.get();
TypeReference fieldType = field.type;
String getterName = TransformationsUtil.toGetterName(
new String(field.name), nameEquals(fieldType.getTypeName(), "boolean"));
TypeDeclaration parent = (TypeDeclaration) fieldNode.up().get();
if ( parent.methods != null ) for ( AbstractMethodDeclaration method : parent.methods ) {
if ( method.selector != null && new String(method.selector).equals(getterName) ) {
errorNode.addWarning(String.format(
"Not generating %s(): A method with that name already exists", getterName));
return false;
}
}
int modifier = toModifier(level) | (field.modifiers & ClassFileConstants.AccStatic);
MethodDeclaration method = generateGetter(parent, field, getterName, modifier, pos);
if ( parent.methods == null ) {
parent.methods = new AbstractMethodDeclaration[1];
parent.methods[0] = method;
} else {
AbstractMethodDeclaration[] newArray = new AbstractMethodDeclaration[parent.methods.length + 1];
System.arraycopy(parent.methods, 0, newArray, 0, parent.methods.length);
newArray[parent.methods.length] = method;
parent.methods = newArray;
}
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 = field.type;
method.annotations = null;
method.arguments = null;
method.selector = name.toCharArray();
method.binding = null;
method.thrownExceptions = null;
method.typeParameters = null;
method.scope = parent.scope == null ? null : new MethodScope(parent.scope, method, false);
method.bits |= ASTNode.Bit24;
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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