org.codehaus.groovy.ast.expr.TupleExpression Java Examples

private void passThisReference(ConstructorCallExpression call) {
    ClassNode cn = call.getType().redirect();
    if (!shouldHandleImplicitThisForInnerClass(cn)) return;

    boolean isInStaticContext = true;
    if (currentMethod != null)
        isInStaticContext = currentMethod.getVariableScope().isInStaticContext();
    else if (currentField != null)
        isInStaticContext = currentField.isStatic();
    else if (processingObjInitStatements)
        isInStaticContext = false;

    // if constructor call is not in static context, return
    if (isInStaticContext) {
        // constructor call is in static context and the inner class is non-static - 1st arg is supposed to be
        // passed as enclosing "this" instance
        //
        Expression args = call.getArguments();
        if (args instanceof TupleExpression && ((TupleExpression) args).getExpressions().isEmpty()) {
            addError("No enclosing instance passed in constructor call of a non-static inner class", call);
        }
        return;
    }
    insertThis0ToSuperCall(call, cn);
}
 

/**
 * Returns true if the given method has a possibly matching instance method with the given name and arguments.
 *
 * @param name      the name of the method of interest
 * @param arguments the arguments to match against
 * @return true if a matching method was found
 */
public boolean hasPossibleMethod(String name, Expression arguments) {
    int count = 0;

    if (arguments instanceof TupleExpression) {
        TupleExpression tuple = (TupleExpression) arguments;
        // TODO this won't strictly be true when using list expansion in argument calls
        count = tuple.getExpressions().size();
    }
    ClassNode node = this;
    do {
        for (MethodNode method : getMethods(name)) {
            if (hasCompatibleNumberOfArgs(method, count) && !method.isStatic()) {
                return true;
            }
        }
        node = node.getSuperClass();
    }
    while (node != null);

    return false;
}
 

public void despreadList(final List<Expression> expressions, final boolean wrap) {
    List<Expression> spreadIndexes = new ArrayList<>();
    List<Expression> spreadExpressions = new ArrayList<>();
    List<Expression> normalArguments = new ArrayList<>();
    for (int i = 0, n = expressions.size(); i < n; i += 1) {
        Expression expr = expressions.get(i);
        if (!(expr instanceof SpreadExpression)) {
            normalArguments.add(expr);
        } else {
            spreadIndexes.add(new ConstantExpression(i - spreadExpressions.size(), true));
            spreadExpressions.add(((SpreadExpression) expr).getExpression());
        }
    }

    // load normal arguments as array
    visitTupleExpression(new ArgumentListExpression(normalArguments), wrap);
    // load spread expressions as array
    new TupleExpression(spreadExpressions).visit(this);
    // load insertion index
    new ArrayExpression(ClassHelper.int_TYPE, spreadIndexes, null).visit(this);

    controller.getOperandStack().remove(1);
    despreadList.call(controller.getMethodVisitor());
}
 

public MapStyleConstructorCall(
        final StaticCompilationTransformer transformer,
        final ClassNode declaringClass,
        final MapExpression map,
        final ConstructorCallExpression originalCall) {
    super(declaringClass);
    this.staticCompilationTransformer = transformer;
    this.declaringClass = declaringClass;
    this.map = map;
    this.originalCall = originalCall;
    this.setSourcePosition(originalCall);
    this.copyNodeMetaData(originalCall);
    List<Expression> originalExpressions = originalCall.getArguments() instanceof TupleExpression
            ? ((TupleExpression) originalCall.getArguments()).getExpressions()
            : null;
    this.innerClassCall = originalExpressions != null && originalExpressions.size() == 2;
}
 

void visitTupleExpression(final TupleExpression expression, final boolean useWrapper) {
    MethodVisitor mv = controller.getMethodVisitor();
    int size = expression.getExpressions().size();

    BytecodeHelper.pushConstant(mv, size);
    mv.visitTypeInsn(ANEWARRAY, "java/lang/Object");

    for (int i = 0; i < size; i += 1) {
        mv.visitInsn(DUP);
        BytecodeHelper.pushConstant(mv, i);
        Expression argument = expression.getExpression(i);
        argument.visit(this);
        controller.getOperandStack().box();
        if (useWrapper && argument instanceof CastExpression) loadWrapper(argument);

        mv.visitInsn(AASTORE);
        controller.getOperandStack().remove(1);
    }
}
 

protected Expression transformConstructorCallExpression(ConstructorCallExpression cce) {
    inSpecialConstructorCall = cce.isSpecialCall();
    Expression expression = cce.getArguments();
    if (expression instanceof TupleExpression) {
        TupleExpression tuple = (TupleExpression) expression;
        if (tuple.getExpressions().size() == 1) {
            expression = tuple.getExpression(0);
            if (expression instanceof NamedArgumentListExpression) {
                NamedArgumentListExpression namedArgs = (NamedArgumentListExpression) expression;
                List<MapEntryExpression> entryExpressions = namedArgs.getMapEntryExpressions();
                for (int i = 0; i < entryExpressions.size(); i++) {
                    entryExpressions.set(i, (MapEntryExpression) transformMapEntryExpression(entryExpressions.get(i), cce.getType()));
                }
            }
        }
    }
    Expression ret = cce.transformExpression(this);
    inSpecialConstructorCall = false;
    return ret;
}
 

public static boolean containsSpreadExpression(final Expression arguments) {
    List<Expression> args;
    if (arguments instanceof TupleExpression) {
        TupleExpression tupleExpression = (TupleExpression) arguments;
        args = tupleExpression.getExpressions();
    } else if (arguments instanceof ListExpression) {
        ListExpression le = (ListExpression) arguments;
        args = le.getExpressions();
    } else {
        return arguments instanceof SpreadExpression;
    }
    for (Expression arg : args) {
        if (arg instanceof SpreadExpression) return true;
    }
    return false;
}
 

protected static ClosureExpression getClosureArgument(SourceUnit source, MethodCallExpression call) {
    TupleExpression tupleArguments = getMacroArguments(source, call);

    int size = tupleArguments == null ? -1 : tupleArguments.getExpressions().size();
    if (size < 1) {
        source.addError(new SyntaxException("Call arguments should have at least one argument" + '\n', tupleArguments));
        return null;
    }

    Expression result = tupleArguments.getExpression(size - 1);
    if (!(result instanceof ClosureExpression)) {
        source.addError(new SyntaxException("Last call argument should be a closure" + '\n', result));
        return null;
    }

    return (ClosureExpression) result;
}
 

protected static TupleExpression getMacroArguments(SourceUnit source, MethodCallExpression call) {
    Expression macroCallArguments = call.getArguments();
    if (macroCallArguments == null) {
        source.addError(new SyntaxException("Call should have arguments" + '\n', call));
        return null;
    }

    if (!(macroCallArguments instanceof TupleExpression)) {
        source.addError(new SyntaxException("Call should have TupleExpression as arguments" + '\n', macroCallArguments));
        return null;
    }

    TupleExpression tupleArguments = (TupleExpression) macroCallArguments;

    if (tupleArguments.getExpressions() == null) {
        source.addError(new SyntaxException("Call arguments should have expressions" + '\n', tupleArguments));
        return null;
    }

    return tupleArguments;
}
 

private void checkFinalFieldAccess(final Expression expression) {
    BiConsumer<VariableExpression, ASTNode> checkForFinal = (expr, node) -> {
        Variable variable = expr.getAccessedVariable();
        if (variable != null) {
            if (isFinal(variable.getModifiers()) && variable instanceof Parameter) {
                addError("Cannot assign a value to final variable '" + variable.getName() + "'", node);
            }
            // TODO: handle local variables
        }
    };

    if (expression instanceof VariableExpression) {
        checkForFinal.accept((VariableExpression) expression, expression);
    } else if (expression instanceof TupleExpression) {
        TupleExpression tuple = (TupleExpression) expression;
        for (Expression tupleExpression : tuple.getExpressions()) {
            checkForFinal.accept((VariableExpression) tupleExpression, expression);
        }
    }
    // currently not looking for PropertyExpression: dealt with at runtime using ReadOnlyPropertyException
}
 

protected BlockStatement createBlockStatementForConstructor(final ClosureExpression expression, final ClassNode outerClass, final ClassNode thisClassNode) {
    BlockStatement block = new BlockStatement();
    // this block does not get a source position, because we don't
    // want this synthetic constructor to show up in corbertura reports
    VariableExpression outer = new VariableExpression(OUTER_INSTANCE, outerClass);
    outer.setSourcePosition(expression);
    block.getVariableScope().putReferencedLocalVariable(outer);
    VariableExpression thisObject = new VariableExpression(THIS_OBJECT, thisClassNode);
    thisObject.setSourcePosition(expression);
    block.getVariableScope().putReferencedLocalVariable(thisObject);
    TupleExpression conArgs = new TupleExpression(outer, thisObject);
    block.addStatement(
            new ExpressionStatement(
                    new ConstructorCallExpression(
                            ClassNode.SUPER,
                            conArgs)));
    return block;
}
 

public boolean addGeneratedClosureConstructorCall(final ConstructorCallExpression call) {
    ClassNode classNode = controller.getClassNode();
    if (!classNode.declaresInterface(ClassHelper.GENERATED_CLOSURE_Type)) return false;

    AsmClassGenerator acg = controller.getAcg();
    OperandStack operandStack = controller.getOperandStack();

    MethodVisitor mv = controller.getMethodVisitor();
    mv.visitVarInsn(ALOAD, 0);
    ClassNode callNode = classNode.getSuperClass();
    TupleExpression arguments = (TupleExpression) call.getArguments();
    if (arguments.getExpressions().size()!=2) throw new GroovyBugError("expected 2 arguments for closure constructor super call, but got"+arguments.getExpressions().size());
    arguments.getExpression(0).visit(acg);
    operandStack.box();
    arguments.getExpression(1).visit(acg);
    operandStack.box();
    //TODO: replace with normal String, p not needed
    Parameter p = new Parameter(ClassHelper.OBJECT_TYPE,"_p");
    String descriptor = BytecodeHelper.getMethodDescriptor(ClassHelper.VOID_TYPE, new Parameter[]{p,p});
    mv.visitMethodInsn(INVOKESPECIAL, BytecodeHelper.getClassInternalName(callNode), "<init>", descriptor, false);
    operandStack.remove(2);
    return true;
}
 

@Override
public void visitMethodCallExpression(final MethodCallExpression call) {
    boolean old = inBuilderMethod;
    inBuilderMethod = false;
    if (call.isImplicitThis() && call.getArguments() instanceof TupleExpression) {
        List<Expression> expressions = ((TupleExpression) call.getArguments()).getExpressions();
        if (!expressions.isEmpty()) {
            Expression lastArg = expressions.get(expressions.size() - 1);
            if (lastArg instanceof ClosureExpression) {
                call.getObjectExpression().visit(this);
                call.getMethod().visit(this);
                for (Expression expression : expressions) {
                    inBuilderMethod =  (expression == lastArg);
                    expression.visit(this);
                }
            }
        }
    } else {
        super.visitMethodCallExpression(call);
    }
    inBuilderMethod = old;
}
 

@Override
public void visitTupleExpression(TupleExpression tupleExpression) {
  if (!methodCallStack.isEmpty()) {
    MethodCallExpression call = Iterables.getLast(methodCallStack);
    if (call.getArguments() == tupleExpression) {
      String parent = call.getMethodAsString();
      String parentParent = getParentParent();
      if (!(tupleExpression instanceof ArgumentListExpression)) {
        Map<String, String> namedArguments = new HashMap<>();
        for (Expression subExpr : tupleExpression.getExpressions()) {
          if (subExpr instanceof NamedArgumentListExpression) {
            NamedArgumentListExpression nale = (NamedArgumentListExpression) subExpr;
            for (MapEntryExpression mae : nale.getMapEntryExpressions()) {
              namedArguments.put(
                  mae.getKeyExpression().getText(), mae.getValueExpression().getText());
            }
          }
        }
        checkMethodCall(parent, parentParent, namedArguments);
      }
    }
  }
  super.visitTupleExpression(tupleExpression);
}
 

@Override
public void visitDeclarationExpression(final DeclarationExpression expression) {
    visitAnnotations(expression);
    // visit right side first to prevent the use of a variable before its declaration
    expression.getRightExpression().visit(this);

    if (expression.isMultipleAssignmentDeclaration()) {
        TupleExpression list = expression.getTupleExpression();
        for (Expression listExpression : list.getExpressions()) {
            declare((VariableExpression) listExpression);
        }
    } else {
        declare(expression.getVariableExpression());
    }
}
 

private void addThisReference(ConstructorNode node) {
    if (!shouldHandleImplicitThisForInnerClass(classNode)) return;

    // add "this$0" field init

    //add this parameter to node
    Parameter[] params = node.getParameters();
    Parameter[] newParams = new Parameter[params.length + 1];
    System.arraycopy(params, 0, newParams, 1, params.length);
    String name = getUniqueName(params, node);

    Parameter thisPara = new Parameter(classNode.getOuterClass().getPlainNodeReference(), name);
    newParams[0] = thisPara;
    node.setParameters(newParams);

    BlockStatement block = getCodeAsBlock(node);
    BlockStatement newCode = block();
    addFieldInit(thisPara, thisField, newCode);
    ConstructorCallExpression cce = getFirstIfSpecialConstructorCall(block);
    if (cce == null) {
        cce = ctorSuperX(new TupleExpression());
        block.getStatements().add(0, stmt(cce));
    }
    if (shouldImplicitlyPassThisPara(cce)) {
        // add thisPara to this(...)
        TupleExpression args = (TupleExpression) cce.getArguments();
        List<Expression> expressions = args.getExpressions();
        VariableExpression ve = varX(thisPara.getName());
        ve.setAccessedVariable(thisPara);
        expressions.add(0, ve);
    }
    if (cce.isSuperCall()) {
        // we have a call to super here, so we need to add
        // our code after that
        block.getStatements().add(1, newCode);
    }
    node.setCode(block);
}
 

private boolean tryPrivateMethod(final MethodNode target, final boolean implicitThis, final Expression receiver, final TupleExpression args, final ClassNode classNode) {
    ClassNode declaringClass = target.getDeclaringClass();
    if ((isPrivateBridgeMethodsCallAllowed(declaringClass, classNode) || isPrivateBridgeMethodsCallAllowed(classNode, declaringClass))
            && declaringClass.getNodeMetaData(StaticCompilationMetadataKeys.PRIVATE_BRIDGE_METHODS) != null
            && !declaringClass.equals(classNode)) {
        if (tryBridgeMethod(target, receiver, implicitThis, args, classNode)) {
            return true;
        } else {
            checkAndAddCannotCallPrivateMethodError(target, receiver, classNode, declaringClass);
        }
    }
    checkAndAddCannotCallPrivateMethodError(target, receiver, classNode, declaringClass);
    return false;
}
 

private void invokeClosure(final Expression arguments, final String methodName) {
    AsmClassGenerator acg = controller.getAcg();
    acg.visitVariableExpression(new VariableExpression(methodName));
    controller.getOperandStack().box();
    if (arguments instanceof TupleExpression) {
        arguments.visit(acg);
    } else {
        new TupleExpression(arguments).visit(acg);
    }
    invokeClosureMethod.call(controller.getMethodVisitor());
    controller.getOperandStack().replace(ClassHelper.OBJECT_TYPE);
}
 

public static int argumentSize(final Expression arguments) {
    if (arguments instanceof TupleExpression) {
        TupleExpression tupleExpression = (TupleExpression) arguments;
        int size = tupleExpression.getExpressions().size();
        return size;
    }
    return 1;
}
 

protected void writeNormalConstructorCall(final ConstructorCallExpression call) {
    Expression arguments = call.getArguments();
    if (arguments instanceof TupleExpression) {
        TupleExpression tupleExpression = (TupleExpression) arguments;
        int size = tupleExpression.getExpressions().size();
        if (size == 0) {
            arguments = MethodCallExpression.NO_ARGUMENTS;
        }
    }

    Expression receiver = new ClassExpression(call.getType());
    controller.getCallSiteWriter().makeCallSite(receiver, CallSiteWriter.CONSTRUCTOR, arguments, false, false, false, false);
}
 

protected void visitBoxedArgument(Expression exp) {
    exp.visit(controller.getAcg());
    if (!(exp instanceof TupleExpression)) {
        // we are not in a tuple, so boxing might be missing for
        // this single argument call
        controller.getOperandStack().box();
    }
}
 

public void visitTupleExpression(TupleExpression node) {
	pushASTNode(node);
	try {
		super.visitTupleExpression(node);
	} finally {
		popASTNode();
	}
}
 

private void recordFinalVars(Expression leftExpression) {
    if (leftExpression instanceof VariableExpression) {
        VariableExpression var = (VariableExpression) leftExpression;
        if (Modifier.isFinal(var.getModifiers())) {
            declaredFinalVariables.add(var);
        }
    } else if (leftExpression instanceof TupleExpression) {
        TupleExpression te = (TupleExpression) leftExpression;
        for (Expression next : te.getExpressions()) {
            if (next instanceof Variable) {
                declaredFinalVariables.add((Variable) next);
            }
        }
    }
}
 

private void recordAssignments(BinaryExpression expression, boolean isDeclaration, Expression leftExpression, Expression rightExpression) {
    if (leftExpression instanceof Variable) {
        boolean uninitialized = isDeclaration && rightExpression instanceof EmptyExpression;
        recordAssignment((Variable) leftExpression, isDeclaration, uninitialized, false, expression);
    } else if (leftExpression instanceof TupleExpression) {
        TupleExpression te = (TupleExpression) leftExpression;
        for (Expression next : te.getExpressions()) {
            if (next instanceof Variable) {
                recordAssignment((Variable) next, isDeclaration, false, false, next);
            }
        }
    }
}
 

public void visitMethodCallExpression(MethodCallExpression mce) {
    super.visitMethodCallExpression(mce);
    Expression aexp = mce.getArguments();
    if (aexp instanceof TupleExpression) {
        TupleExpression arguments = (TupleExpression) aexp;
        for (Expression e : arguments.getExpressions()) {
            checkForInvalidDeclaration(e);
        }
    } else {
        checkForInvalidDeclaration(aexp);
    }
}
 

@Override
public void visitConstructorCallExpression(final ConstructorCallExpression cce) {
    if (!insideScriptBody || !cce.isUsingAnonymousInnerClass()) return;
    ConstructorCallExpression old = currentAIC;
    currentAIC = cce;
    Expression newArgs = transform(cce.getArguments());
    if (cce.getArguments() instanceof TupleExpression && newArgs instanceof TupleExpression) {
        List<Expression> argList = ((TupleExpression) cce.getArguments()).getExpressions();
        argList.clear();
        argList.addAll(((TupleExpression) newArgs).getExpressions());
    }
    currentAIC = old;
}
 

private ArgumentListExpression createArgumentList(final Expression origCallArgs) {
    ArgumentListExpression newArgs = new ArgumentListExpression();
    newArgs.addExpression(new VariableExpression(weaved));
    if (origCallArgs instanceof TupleExpression) {
        List<Expression> expressions = ((TupleExpression) origCallArgs).getExpressions();
        for (Expression expression : expressions) {
            newArgs.addExpression(transform(expression));
        }
    } else {
        newArgs.addExpression(origCallArgs);
    }
    return newArgs;
}
 

private Expression transformMethodCallExpression(final MethodCallExpression exp) {
    if (isTraitSuperPropertyExpression(exp.getObjectExpression())) {
        Expression objectExpression = exp.getObjectExpression();
        ClassNode traitReceiver = ((PropertyExpression) objectExpression).getObjectExpression().getType();

        if (traitReceiver != null) {
            // (SomeTrait.super).foo() --> SomeTrait$Helper.foo(this)
            ClassExpression receiver = new ClassExpression(
                    getHelper(traitReceiver)
            );
            ArgumentListExpression newArgs = new ArgumentListExpression();
            Expression arguments = exp.getArguments();
            newArgs.addExpression(new VariableExpression("this"));
            if (arguments instanceof TupleExpression) {
                List<Expression> expressions = ((TupleExpression) arguments).getExpressions();
                for (Expression expression : expressions) {
                    newArgs.addExpression(transform(expression));
                }
            } else {
                newArgs.addExpression(transform(arguments));
            }
            MethodCallExpression result = new MethodCallExpression(
                    receiver,
                    transform(exp.getMethod()),
                    newArgs
            );
            result.setImplicitThis(false);
            result.setSpreadSafe(exp.isSpreadSafe());
            result.setSafe(exp.isSafe());
            result.setSourcePosition(exp);
            return result;
        }
    }
    return super.transform(exp);
}
 

@Override
public boolean complete(List<CompletionProposal> proposals, CompletionContext context, int anchor) {
    this.context = context;

    ASTNode leaf = context.path.leaf();

    if (leaf instanceof ConstructorCallExpression) {
        ConstructorCallExpression constructorCall = (ConstructorCallExpression) leaf;
        
        Expression constructorArgs = constructorCall.getArguments();
        if (constructorArgs instanceof TupleExpression) {
            List<Expression> arguments = ((TupleExpression) constructorArgs).getExpressions();

            if (arguments.isEmpty()) {
                completeNamedParams(proposals, anchor, constructorCall, null);
            } else {
                for (Expression argExpression : arguments) {
                    if (argExpression instanceof NamedArgumentListExpression) {
                        completeNamedParams(proposals, anchor, constructorCall, (NamedArgumentListExpression) argExpression);
                    }
                }
            }
        }
    }

    ASTNode leafParent = context.path.leafParent();
    ASTNode leafGrandparent = context.path.leafGrandParent();
    if (leafParent instanceof NamedArgumentListExpression &&
        leafGrandparent instanceof ConstructorCallExpression) {

        completeNamedParams(proposals, anchor, (ConstructorCallExpression) leafGrandparent, (NamedArgumentListExpression) leafParent);
    }

    return false;
}
 

private Expression tryTransformInclude(final MethodCallExpression exp) {
    Expression arguments = exp.getArguments();
    if (arguments instanceof TupleExpression) {
        List<Expression> expressions = ((TupleExpression) arguments).getExpressions();
        if (expressions.size() == 1 && expressions.get(0) instanceof MapExpression) {
            MapExpression map = (MapExpression) expressions.get(0);
            List<MapEntryExpression> entries = map.getMapEntryExpressions();
            if (entries.size() == 1) {
                MapEntryExpression mapEntry = entries.get(0);
                Expression keyExpression = mapEntry.getKeyExpression();
                try {
                    IncludeType includeType = IncludeType.valueOf(keyExpression.getText().toLowerCase());
                    MethodCallExpression call = new MethodCallExpression(
                            exp.getObjectExpression(),
                            includeType.getMethodName(),
                            new ArgumentListExpression(
                                    mapEntry.getValueExpression()
                            )
                    );
                    call.setImplicitThis(true);
                    call.setSafe(exp.isSafe());
                    call.setSpreadSafe(exp.isSpreadSafe());
                    call.setSourcePosition(exp);
                    return call;
                } catch (IllegalArgumentException e) {
                    // not a valid import type, do not modify the code
                }
            }

        }
    }
    return super.transform(exp);
}