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package lombok.eclipse.handlers;
import static lombok.eclipse.Eclipse.*;
import static lombok.eclipse.handlers.PKG.*;
import java.lang.reflect.Modifier;
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 lombok.eclipse.handlers.PKG.MethodExistsResult;
import org.eclipse.jdt.internal.compiler.ast.ASTNode;
import org.eclipse.jdt.internal.compiler.ast.AllocationExpression;
import org.eclipse.jdt.internal.compiler.ast.Annotation;
import org.eclipse.jdt.internal.compiler.ast.Argument;
import org.eclipse.jdt.internal.compiler.ast.Assignment;
import org.eclipse.jdt.internal.compiler.ast.BinaryExpression;
import org.eclipse.jdt.internal.compiler.ast.CastExpression;
import org.eclipse.jdt.internal.compiler.ast.CompilationUnitDeclaration;
import org.eclipse.jdt.internal.compiler.ast.ConstructorDeclaration;
import org.eclipse.jdt.internal.compiler.ast.EqualExpression;
import org.eclipse.jdt.internal.compiler.ast.ExplicitConstructorCall;
import org.eclipse.jdt.internal.compiler.ast.Expression;
import org.eclipse.jdt.internal.compiler.ast.FalseLiteral;
import org.eclipse.jdt.internal.compiler.ast.FieldDeclaration;
import org.eclipse.jdt.internal.compiler.ast.FieldReference;
import org.eclipse.jdt.internal.compiler.ast.IfStatement;
import org.eclipse.jdt.internal.compiler.ast.LocalDeclaration;
import org.eclipse.jdt.internal.compiler.ast.MessageSend;
import org.eclipse.jdt.internal.compiler.ast.MethodDeclaration;
import org.eclipse.jdt.internal.compiler.ast.NullLiteral;
import org.eclipse.jdt.internal.compiler.ast.OperatorIds;
import org.eclipse.jdt.internal.compiler.ast.QualifiedTypeReference;
import org.eclipse.jdt.internal.compiler.ast.ReturnStatement;
import org.eclipse.jdt.internal.compiler.ast.SingleNameReference;
import org.eclipse.jdt.internal.compiler.ast.SingleTypeReference;
import org.eclipse.jdt.internal.compiler.ast.Statement;
import org.eclipse.jdt.internal.compiler.ast.StringLiteral;
import org.eclipse.jdt.internal.compiler.ast.ThisReference;
import org.eclipse.jdt.internal.compiler.ast.TrueLiteral;
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.TypeConstants;
import org.eclipse.jdt.internal.compiler.lookup.TypeIds;
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) {
Data ann = annotation.getInstance();
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());
}
if ( methodExists("toString", typeNode) == MethodExistsResult.NOT_EXISTS ) {
MethodDeclaration toString = createToString(typeNode, nodesForConstructorAndToString, ast);
injectMethod(typeNode, toString);
}
if ( constructorExists(typeNode) == MethodExistsResult.NOT_EXISTS ) {
ConstructorDeclaration constructor = createConstructor(
ann.staticConstructor().isEmpty(), typeNode, nodesForConstructorAndToString, ast);
injectMethod(typeNode, constructor);
}
if ( !ann.staticConstructor().isEmpty() ) {
if ( methodExists("of", typeNode) == MethodExistsResult.NOT_EXISTS ) {
MethodDeclaration staticConstructor = createStaticConstructor(
ann.staticConstructor(), typeNode, nodesForConstructorAndToString, ast);
injectMethod(typeNode, staticConstructor);
}
}
//TODO generate hashCode, equals.
return false;
}
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 = new QualifiedTypeReference(TypeConstants.JAVA_LANG_STRING, new long[] {0, 0, 0});
method.annotations = null;
method.arguments = null;
method.selector = "toString".toCharArray();
method.thrownExceptions = null;
method.typeParameters = null;
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 ConstructorDeclaration createConstructor(boolean isPublic, Node type, Collection<Node> fields, ASTNode pos) {
long p = (long)pos.sourceStart << 32 | pos.sourceEnd;
ConstructorDeclaration constructor = new ConstructorDeclaration(
((CompilationUnitDeclaration) type.top().get()).compilationResult);
constructor.modifiers = PKG.toModifier(isPublic ? AccessLevel.PUBLIC : AccessLevel.PRIVATE);
constructor.annotations = null;
constructor.selector = ((TypeDeclaration)type.get()).name;
constructor.constructorCall = new ExplicitConstructorCall(ExplicitConstructorCall.ImplicitSuper);
constructor.thrownExceptions = null;
constructor.typeParameters = null;
constructor.bits |= Eclipse.ECLIPSE_DO_NOT_TOUCH_FLAG;
constructor.bodyStart = constructor.declarationSourceStart = constructor.sourceStart = pos.sourceStart;
constructor.bodyEnd = constructor.declarationSourceEnd = constructor.sourceEnd = pos.sourceEnd;
constructor.arguments = null;
List<Argument> args = new ArrayList<Argument>();
List<Statement> assigns = new ArrayList<Statement>();
for ( Node fieldNode : fields ) {
FieldDeclaration field = (FieldDeclaration) fieldNode.get();
FieldReference thisX = new FieldReference(("this." + new String(field.name)).toCharArray(), p);
thisX.receiver = new ThisReference((int)(p >> 32), (int)p);
thisX.token = field.name;
assigns.add(new Assignment(thisX, new SingleNameReference(field.name, p), (int)p));
long fieldPos = (((long)field.sourceStart) << 32) | field.sourceEnd;
args.add(new Argument(field.name, fieldPos, copyType(field.type), 0));
}
constructor.statements = assigns.toArray(new Statement[assigns.size()]);
constructor.arguments = args.toArray(new Argument[args.size()]);
return constructor;
}
private MethodDeclaration createStaticConstructor(String name, Node type, Collection<Node> fields, ASTNode pos) {
long p = (long)pos.sourceStart << 32 | pos.sourceEnd;
MethodDeclaration constructor = new MethodDeclaration(
((CompilationUnitDeclaration) type.top().get()).compilationResult);
constructor.modifiers = PKG.toModifier(AccessLevel.PUBLIC) | Modifier.STATIC;
constructor.returnType = new SingleTypeReference(((TypeDeclaration)type.get()).name, p);
constructor.annotations = null;
constructor.selector = name.toCharArray();
constructor.thrownExceptions = null;
constructor.typeParameters = copyTypeParams(((TypeDeclaration)type.get()).typeParameters);
constructor.bits |= Eclipse.ECLIPSE_DO_NOT_TOUCH_FLAG;
constructor.bodyStart = constructor.declarationSourceStart = constructor.sourceStart = pos.sourceStart;
constructor.bodyEnd = constructor.declarationSourceEnd = constructor.sourceEnd = pos.sourceEnd;
List<Argument> args = new ArrayList<Argument>();
List<Expression> assigns = new ArrayList<Expression>();
AllocationExpression statement = new AllocationExpression();
statement.type = copyType(constructor.returnType);
for ( Node fieldNode : fields ) {
FieldDeclaration field = (FieldDeclaration) fieldNode.get();
long fieldPos = (((long)field.sourceStart) << 32) | field.sourceEnd;
assigns.add(new SingleNameReference(field.name, fieldPos));
args.add(new Argument(field.name, fieldPos, copyType(field.type), 0));
}
statement.arguments = assigns.toArray(new Expression[assigns.size()]);
constructor.arguments = args.toArray(new Argument[args.size()]);
constructor.statements = new Statement[] { new ReturnStatement(statement, (int)(p >> 32), (int)p) };
return constructor;
}
private MethodDeclaration createEquals(Node type, Collection<Node> fields, ASTNode pos) {
long p = (long)pos.sourceStart << 32 | pos.sourceEnd;
MethodDeclaration method = new MethodDeclaration(
((CompilationUnitDeclaration) type.top().get()).compilationResult);
method.modifiers = PKG.toModifier(AccessLevel.PUBLIC);
method.returnType = TypeReference.baseTypeReference(TypeIds.T_boolean, 0);
method.annotations = null;
method.selector = "equals".toCharArray();
method.thrownExceptions = null;
method.typeParameters = null;
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.arguments = new Argument[] {
new Argument(new char[] { 'o' }, 0,
new QualifiedTypeReference(TypeConstants.JAVA_LANG_OBJECT, new long[] { 0, 0, 0 }), 0)
};
List<Statement> statements = new ArrayList<Statement>();
/* if ( o == this ) return true; */ {
EqualExpression otherEqualsThis = new EqualExpression(
new SingleNameReference(new char[] { 'o' }, 0),
new ThisReference(0, 0), OperatorIds.EQUAL_EQUAL);
ReturnStatement returnTrue = new ReturnStatement(new TrueLiteral(0, 0), 0, 0);
IfStatement ifOtherEqualsThis = new IfStatement(otherEqualsThis, returnTrue, 0, 0);
statements.add(ifOtherEqualsThis);
}
/* if ( o == null ) return false; */ {
EqualExpression otherEqualsNull = new EqualExpression(
new SingleNameReference(new char[] { 'o' }, 0),
new NullLiteral(0, 0), OperatorIds.EQUAL_EQUAL);
ReturnStatement returnFalse = new ReturnStatement(new FalseLiteral(0, 0), 0, 0);
IfStatement ifOtherEqualsNull = new IfStatement(otherEqualsNull, returnFalse, 0, 0);
statements.add(ifOtherEqualsNull);
}
/* if ( o.getClass() != getClass() ) return false; */ {
MessageSend otherGetClass = new MessageSend();
otherGetClass.receiver = new SingleNameReference(new char[] { 'o' }, 0);
otherGetClass.selector = "getClass".toCharArray();
MessageSend thisGetClass = new MessageSend();
thisGetClass.receiver = new ThisReference(0, 0);
thisGetClass.selector = "getClass".toCharArray();
EqualExpression classesNotEqual = new EqualExpression(otherGetClass, thisGetClass, OperatorIds.NOT_EQUAL);
ReturnStatement returnFalse = new ReturnStatement(new FalseLiteral(0, 0), 0, 0);
IfStatement ifClassesNotEqual = new IfStatement(classesNotEqual, returnFalse, 0, 0);
statements.add(ifClassesNotEqual);
}
char[] otherN = "other".toCharArray();
//TODO fix generics raw type warnings by inserting Wildcards.
/* MyType other = (MyType) o; */ {
if ( !fields.isEmpty() ) {
LocalDeclaration other = new LocalDeclaration(otherN, 0, 0);
other.initialization = new CastExpression(
new SingleNameReference(new char[] { 'o' }, 0),
new SingleNameReference(((TypeDeclaration)type.get()).name, 0));
}
}
for ( Node field : fields ) {
FieldDeclaration f = (FieldDeclaration) field.get();
//compare if primitive, write per-primitive special code, otherwise use == null ? other == null ? .equals(other).
//TODO I LEFT IT HERE
}
/* return true; */ {
statements.add(new ReturnStatement(new TrueLiteral(0, 0), 0, 0));
}
method.statements = statements.toArray(new Statement[statements.size()]);
return method;
}
private MethodDeclaration createHashCode(Node type, Collection<Node> fields, ASTNode pos) {
//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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