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package lombok.eclipse.handlers;
import static lombok.eclipse.handlers.PKG.*;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import lombok.AccessLevel;
import lombok.Data;
import lombok.core.AnnotationValues;
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.BinaryExpression;
import org.eclipse.jdt.internal.compiler.ast.CompilationUnitDeclaration;
import org.eclipse.jdt.internal.compiler.ast.ConstructorDeclaration;
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.OperatorIds;
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.StringLiteral;
import org.eclipse.jdt.internal.compiler.ast.TypeDeclaration;
import org.eclipse.jdt.internal.compiler.classfmt.ClassFileConstants;
import org.eclipse.jdt.internal.compiler.lookup.MethodBinding;
import org.eclipse.jdt.internal.compiler.lookup.MethodScope;
import org.mangosdk.spi.ProviderFor;
@ProviderFor(EclipseAnnotationHandler.class)
public class HandleData implements EclipseAnnotationHandler<Data> {
@Override public boolean handle(AnnotationValues<Data> annotation, Annotation ast, Node annotationNode) {
Node typeNode = annotationNode.up();
TypeDeclaration typeDecl = null;
if ( typeNode.get() instanceof TypeDeclaration ) typeDecl = (TypeDeclaration) typeNode.get();
int modifiers = typeDecl == null ? 0 : typeDecl.modifiers;
boolean notAClass = (modifiers &
(ClassFileConstants.AccInterface | ClassFileConstants.AccAnnotation | ClassFileConstants.AccEnum)) != 0;
if ( typeDecl == null || notAClass ) {
annotationNode.addError("@Data is only supported on a class.");
return false;
}
List<Node> nodesForEquality = new ArrayList<Node>();
List<Node> nodesForConstructorAndToString = new ArrayList<Node>();
for ( Node child : typeNode.down() ) {
if ( child.getKind() != Kind.FIELD ) continue;
FieldDeclaration fieldDecl = (FieldDeclaration) child.get();
//Skip static fields.
if ( (fieldDecl.modifiers & ClassFileConstants.AccStatic) != 0 ) continue;
if ( (fieldDecl.modifiers & ClassFileConstants.AccTransient) == 0 ) nodesForEquality.add(child);
nodesForConstructorAndToString.add(child);
new HandleGetter().generateGetterForField(child, annotationNode.get());
if ( (fieldDecl.modifiers & ClassFileConstants.AccFinal) == 0 )
new HandleSetter().generateSetterForField(child, annotationNode.get());
}
switch ( methodExists("toString", typeNode) ) {
case NOT_EXISTS:
MethodDeclaration toString = createToString(typeNode, nodesForConstructorAndToString, ast);
injectMethod(typeNode, toString);
break;
case EXISTS_BY_LOMBOK:
injectScopeIntoToString((MethodDeclaration) getExistingLombokMethod("toString", typeNode).get(), typeDecl);
}
//TODO generate constructor, hashCode, equals.
return false;
}
private void injectScopeIntoToString(MethodDeclaration method, TypeDeclaration typeDecl) {
if ( typeDecl.scope != null ) {
method.scope = new MethodScope(typeDecl.scope, method, false);
method.returnType.resolvedType = typeDecl.scope.getJavaLangString();
method.binding = new MethodBinding(method.modifiers,
method.selector, typeDecl.scope.getJavaLangString(), null, null, typeDecl.binding);
}
}
private MethodDeclaration createToString(Node type, Collection<Node> fields, ASTNode pos) {
char[] rawTypeName = ((TypeDeclaration)type.get()).name;
String typeName = rawTypeName == null ? "" : new String(rawTypeName);
char[] prefix = (typeName + "(").toCharArray();
char[] suffix = ")".toCharArray();
char[] infix = ", ".toCharArray();
long p = (long)pos.sourceStart << 32 | pos.sourceEnd;
final int PLUS = OperatorIds.PLUS;
boolean first = true;
Expression current = new StringLiteral(prefix, 0, 0, 0);
for ( Node field : fields ) {
char[] fName = ((FieldDeclaration)field.get()).name;
if ( fName == null ) continue;
if ( !first ) {
current = new BinaryExpression(current, new StringLiteral(infix, 0, 0, 0), PLUS);
}
else first = false;
current = new BinaryExpression(current, new SingleNameReference(fName, p), PLUS);
}
current = new BinaryExpression(current, new StringLiteral(suffix, 0, 0, 0), PLUS);
ReturnStatement returnStatement = new ReturnStatement(current, (int)(p >> 32), (int)p);
MethodDeclaration method = new MethodDeclaration(((CompilationUnitDeclaration) type.top().get()).compilationResult);
method.modifiers = PKG.toModifier(AccessLevel.PUBLIC);
method.returnType = Eclipse.TYPEREF_JAVA_LANG_STRING;
method.annotations = null;
method.arguments = null;
method.selector = "toString".toCharArray();
method.binding = null;
method.thrownExceptions = null;
method.typeParameters = null;
injectScopeIntoToString(method, (TypeDeclaration) type.get());
method.bits |= Eclipse.ECLIPSE_DO_NOT_TOUCH_FLAG;
method.bodyStart = method.declarationSourceStart = method.sourceStart = pos.sourceStart;
method.bodyEnd = method.declarationSourceEnd = method.sourceEnd = pos.sourceEnd;
method.statements = new Statement[] { returnStatement };
return method;
}
private MethodDeclaration createEquals(Collection<Node> fields) {
return null;
}
private ConstructorDeclaration createConstructor(Collection<Node> fields) {
//If using an of() constructor, make private.
//method params
//on loop: Assignment(FieldReference(ThisReference, "x"), SingleNameReference("x"))
return null;
}
private MethodDeclaration createStaticConstructor(Collection<Node> fields) {
//Return(AllocationExpression(SingleTypeReference("Bar"), namesOfFields);
return null;
}
private MethodDeclaration createHashCode(Collection<Node> fields) {
//booleans: conditionalexpression that bounces between 1231 and 1237.
//longs: (int) (lng ^ (lng >>> 32));
//doubles and floats: Double.doubleToLongBits, then as long.
//local final var PRIME = IntLiteral(primeNumber)
//local final var RESULT = IntLiteral(1)
// Assignment("RESULT", BinaryExpression("+", BinaryExpression("*", "PRIME", "RESULT"), "name")
// add = ConditionalExpression(EqualExpression("name", NullLiteral), IntLiteral(0), MessageSend("name", "hashCode()"))
// Assignment("RESULT", BinaryExpression("+", BinaryExpression("*", "PRIME", "RESULT"), add);
return null;
}
}
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