Examples with SwapDescription org.eclipse.jdt.internal.ui.text.correction.proposals.ChangeMethodSignatureProposal.SwapDescription used on opensource projects

Example 1 with SwapDescription

use of org.eclipse.jdt.internal.ui.text.correction.proposals.ChangeMethodSignatureProposal.SwapDescription in project che by eclipse.

the class UnresolvedElementsSubProcessor method doEqualNumberOfParameters.

private static void doEqualNumberOfParameters(IInvocationContext context, ASTNode invocationNode, IProblemLocation problem, List<Expression> arguments, ITypeBinding[] argTypes, IMethodBinding methodBinding, Collection<ICommandAccess> proposals) throws CoreException {
    ITypeBinding[] paramTypes = methodBinding.getParameterTypes();
    int[] indexOfDiff = new int[paramTypes.length];
    int nDiffs = 0;
    for (int n = 0; n < argTypes.length; n++) {
        if (!canAssign(argTypes[n], paramTypes[n])) {
            indexOfDiff[nDiffs++] = n;
        }
    }
    ITypeBinding declaringTypeDecl = methodBinding.getDeclaringClass().getTypeDeclaration();
    ICompilationUnit cu = context.getCompilationUnit();
    CompilationUnit astRoot = context.getASTRoot();
    ASTNode nameNode = problem.getCoveringNode(astRoot);
    if (nameNode == null) {
        return;
    }
    if (nDiffs == 0) {
        if (nameNode.getParent() instanceof MethodInvocation) {
            MethodInvocation inv = (MethodInvocation) nameNode.getParent();
            if (inv.getExpression() == null) {
                addQualifierToOuterProposal(context, inv, methodBinding, proposals);
            }
        }
        return;
    }
    if (nDiffs == 1) {
        // one argument mismatching: try to fix
        int idx = indexOfDiff[0];
        Expression nodeToCast = arguments.get(idx);
        ITypeBinding castType = paramTypes[idx];
        castType = Bindings.normalizeTypeBinding(castType);
        if (castType.isWildcardType()) {
            castType = ASTResolving.normalizeWildcardType(castType, false, nodeToCast.getAST());
        }
        if (castType != null) {
            ITypeBinding binding = nodeToCast.resolveTypeBinding();
            ITypeBinding castFixType = null;
            if (binding == null || castType.isCastCompatible(binding)) {
                castFixType = castType;
            } else if (JavaModelUtil.is50OrHigher(cu.getJavaProject())) {
                ITypeBinding boxUnboxedTypeBinding = TypeMismatchSubProcessor.boxUnboxPrimitives(castType, binding, nodeToCast.getAST());
                if (boxUnboxedTypeBinding != castType && boxUnboxedTypeBinding.isCastCompatible(binding)) {
                    castFixType = boxUnboxedTypeBinding;
                }
            }
            if (castFixType != null) {
                ASTRewriteCorrectionProposal proposal = TypeMismatchSubProcessor.createCastProposal(context, castFixType, nodeToCast, IProposalRelevance.CAST_ARGUMENT_1);
                String castTypeName = BindingLabelProvider.getBindingLabel(castFixType, JavaElementLabels.ALL_DEFAULT);
                String[] arg = new String[] { getArgumentName(arguments, idx), castTypeName };
                proposal.setDisplayName(Messages.format(CorrectionMessages.UnresolvedElementsSubProcessor_addargumentcast_description, arg));
                proposals.add(proposal);
            }
            TypeMismatchSubProcessor.addChangeSenderTypeProposals(context, nodeToCast, castType, false, IProposalRelevance.CAST_ARGUMENT_2, proposals);
        }
    }
    if (nDiffs == 2) {
        // try to swap
        int idx1 = indexOfDiff[0];
        int idx2 = indexOfDiff[1];
        boolean canSwap = canAssign(argTypes[idx1], paramTypes[idx2]) && canAssign(argTypes[idx2], paramTypes[idx1]);
        if (canSwap) {
            Expression arg1 = arguments.get(idx1);
            Expression arg2 = arguments.get(idx2);
            ASTRewrite rewrite = ASTRewrite.create(astRoot.getAST());
            rewrite.replace(arg1, rewrite.createCopyTarget(arg2), null);
            rewrite.replace(arg2, rewrite.createCopyTarget(arg1), null);
            {
                String[] arg = new String[] { getArgumentName(arguments, idx1), getArgumentName(arguments, idx2) };
                String label = Messages.format(CorrectionMessages.UnresolvedElementsSubProcessor_swaparguments_description, arg);
                Image image = JavaPluginImages.get(JavaPluginImages.IMG_CORRECTION_CHANGE);
                ASTRewriteCorrectionProposal proposal = new ASTRewriteCorrectionProposal(label, context.getCompilationUnit(), rewrite, IProposalRelevance.SWAP_ARGUMENTS, image);
                proposals.add(proposal);
            }
            if (declaringTypeDecl.isFromSource()) {
                ICompilationUnit targetCU = ASTResolving.findCompilationUnitForBinding(cu, astRoot, declaringTypeDecl);
                if (targetCU != null) {
                    ChangeDescription[] changeDesc = new ChangeDescription[paramTypes.length];
                    for (int i = 0; i < nDiffs; i++) {
                        changeDesc[idx1] = new SwapDescription(idx2);
                    }
                    IMethodBinding methodDecl = methodBinding.getMethodDeclaration();
                    ITypeBinding[] declParamTypes = methodDecl.getParameterTypes();
                    ITypeBinding[] swappedTypes = new ITypeBinding[] { declParamTypes[idx1], declParamTypes[idx2] };
                    String[] args = new String[] { ASTResolving.getMethodSignature(methodDecl), getTypeNames(swappedTypes) };
                    String label;
                    if (methodDecl.isConstructor()) {
                        label = Messages.format(CorrectionMessages.UnresolvedElementsSubProcessor_swapparams_constr_description, args);
                    } else {
                        label = Messages.format(CorrectionMessages.UnresolvedElementsSubProcessor_swapparams_description, args);
                    }
                    Image image = JavaPluginImages.get(JavaPluginImages.IMG_CORRECTION_CHANGE);
                    ChangeMethodSignatureProposal proposal = new ChangeMethodSignatureProposal(label, targetCU, invocationNode, methodDecl, changeDesc, null, IProposalRelevance.CHANGE_METHOD_SWAP_PARAMETERS, image);
                    proposals.add(proposal);
                }
            }
            return;
        }
    }
    if (declaringTypeDecl.isFromSource()) {
        ICompilationUnit targetCU = ASTResolving.findCompilationUnitForBinding(cu, astRoot, declaringTypeDecl);
        if (targetCU != null) {
            ChangeDescription[] changeDesc = createSignatureChangeDescription(indexOfDiff, nDiffs, paramTypes, arguments, argTypes);
            if (changeDesc != null) {
                IMethodBinding methodDecl = methodBinding.getMethodDeclaration();
                ITypeBinding[] declParamTypes = methodDecl.getParameterTypes();
                ITypeBinding[] newParamTypes = new ITypeBinding[changeDesc.length];
                for (int i = 0; i < newParamTypes.length; i++) {
                    newParamTypes[i] = changeDesc[i] == null ? declParamTypes[i] : ((EditDescription) changeDesc[i]).type;
                }
                boolean isVarArgs = methodDecl.isVarargs() && newParamTypes.length > 0 && newParamTypes[newParamTypes.length - 1].isArray();
                String[] args = new String[] { ASTResolving.getMethodSignature(methodDecl), ASTResolving.getMethodSignature(methodDecl.getName(), newParamTypes, isVarArgs) };
                String label;
                if (methodDecl.isConstructor()) {
                    label = Messages.format(CorrectionMessages.UnresolvedElementsSubProcessor_changeparamsignature_constr_description, args);
                } else {
                    label = Messages.format(CorrectionMessages.UnresolvedElementsSubProcessor_changeparamsignature_description, args);
                }
                Image image = JavaPluginImages.get(JavaPluginImages.IMG_CORRECTION_CHANGE);
                ChangeMethodSignatureProposal proposal = new ChangeMethodSignatureProposal(label, targetCU, invocationNode, methodDecl, changeDesc, null, IProposalRelevance.CHANGE_METHOD_SIGNATURE, image);
                proposals.add(proposal);
            }
        }
    }
}