com.sun.source.tree.MethodInvocationTree#getArguments ( )源码实例Demo

private static List<? extends TypeMirror> computeMethodInvocation(Set<ElementKind> types, CompilationInfo info, TreePath parent, Tree error, int offset) {
    MethodInvocationTree nat = (MethodInvocationTree) parent.getLeaf();
    boolean errorInRealArguments = false;
    
    for (Tree param : nat.getArguments()) {
        errorInRealArguments |= param == error;
    }
    
    if (errorInRealArguments) {
        List<TypeMirror> proposedTypes = new ArrayList<TypeMirror>();
        int[] proposedIndex = new int[1];
        List<ExecutableElement> ee = fuzzyResolveMethodInvocation(info, parent, proposedTypes, proposedIndex);
        
        if (ee.isEmpty()) { //cannot be resolved
            return null;
        }
        
        types.add(ElementKind.PARAMETER);
        types.add(ElementKind.LOCAL_VARIABLE);
        types.add(ElementKind.FIELD);
        
        return proposedTypes;
    }
    
    return null;
}
 

@Override
public Boolean visitMethodInvocation(MethodInvocationTree node, Void p) {
    Boolean expr = scan(node.getMethodSelect(), p);
    if (expr == Boolean.TRUE) {
        // check invoked methods
        incompatibleMethodCalled = true;
        return expr;
    } else {
        for (ExpressionTree et : node.getArguments()) {
            Boolean used = scan(et, p);
            if (used == Boolean.TRUE) {
                passedToMethod = true;
            }
        }
    }
    
    return false;
}
 

/**
 * Checks whether a method or constructor call would become ambiguous if the parameter type changes.
 * 
 * @param info compilation context
 * @param parentExec path to the constructor or method invocation
 * @param argIndex
 * @param casteeType
 * @return 
 */
private static boolean checkAmbiguous(CompilationInfo info, final TreePath parentExec, int argIndex, TypeMirror casteeType, TreePath realArgTree) {
    CharSequence altType = info.getTypeUtilities().getTypeName(casteeType, TypeUtilities.TypeNameOptions.PRINT_FQN);
    String prefix = null;
    if (casteeType != null && !(casteeType.getKind() == TypeKind.NULL || casteeType.getKind() == TypeKind.INTERSECTION)) {
        prefix = "(" + altType + ")"; // NOI18N
    }
    Tree leaf = parentExec.getLeaf();
    List<? extends Tree> arguments;
    if (leaf instanceof MethodInvocationTree) {
        MethodInvocationTree mi = (MethodInvocationTree)leaf;
        arguments = mi.getArguments();
    } else {
        arguments = ((NewClassTree)leaf).getArguments();
    }
    Tree argTree = arguments.get(argIndex);
    TreePath argPath = new TreePath(parentExec, argTree);
    return !Utilities.checkAlternativeInvocation(info, parentExec, argPath, realArgTree, prefix);
}
 

@Override
public MethodArgument[] visitMethodInvocation(MethodInvocationTree node, Object p) {
    if (!methodInvocation || offset != positions.getEndPosition(tree, node.getMethodSelect())) {
        return super.visitMethodInvocation(node, p);
        /*MethodArgument[] r = scan(node.getTypeArguments(), p);
        r = scanAndReduce(node.getMethodSelect(), p, r);
        r = scanAndReduce(node.getArguments(), p, r);
        return r;*/
    }
    List<? extends ExpressionTree> args = node.getArguments();
    List<? extends Tree> argTypes = node.getTypeArguments();
    /*int n = args.size();
    arguments = new MethodArgument[n];
    for (int i = 0; i < n; i++) {
        arguments[i] = new MethodArgument(args.get(i).toString(), argTypes.get(i).toString());
    }
    return arguments;*/
    arguments = composeArguments(args, argTypes);
    return arguments;
}
 

private int getLambdaIndexFromInvokingTree(Tree invokingTree) {
    List<? extends ExpressionTree> invokingArgs;
    if (invokingTree.getKind() == Tree.Kind.METHOD_INVOCATION) {
        MethodInvocationTree invokingMethTree = ((MethodInvocationTree) invokingTree);
        invokingArgs = invokingMethTree.getArguments();
    } else if (invokingTree.getKind() == Tree.Kind.NEW_CLASS) {
        NewClassTree invokingConstrTree = (NewClassTree) invokingTree;
        invokingArgs = invokingConstrTree.getArguments();
    } else {
        return -1;
    }

    return getIndexOfLambdaInArgs(newClassTree, invokingArgs);
}
 

@Override
public State visitMethodInvocation(MethodInvocationTree node, Void p) {
    Element target = ci.getTrees().getElement(getCurrentPath());
    if (target == null) {
        return State.NO;
    }
    State r = null;
    if (target == checkMethod && breakContinueJumps.isEmpty()) {
        if (node.getMethodSelect().getKind() != Tree.Kind.IDENTIFIER) {
            this.thisTree = null;

            returnIfRecurse(r = scan(node.getMethodSelect(), p));
            if (this.thisTree != null) {
                r = State.MUST;
            }
        } else {
            r = State.MUST;
        }
    } else {
        r = scan(node.getMethodSelect(), p);
    }
    if (r == null) {
        for (Tree arg : node.getArguments()) {
            if (returnIfRecurse(r = scan(arg, p))) {
                break;
            }
        }
    }
    this.thisTree = null;
    if (r == null || r == State.NO) {
        return State.NO;
    }
    recursionPoints.add(getCurrentPath());
    return knownResult = State.MUST;
}
 

private static List<? extends TypeMirror> computeMethodInvocation(Set<ElementKind> types, CompilationInfo info, TreePath parent, Tree error, int offset) {
    MethodInvocationTree nat = (MethodInvocationTree) parent.getLeaf();
    int realArgumentError = -1;
    int i = 0;
    for (Tree param : nat.getArguments()) {
        if (param == error) {
            realArgumentError = i;
            break;
        }
        i++;
    }
    
    if (realArgumentError != (-1)) {
        List<TypeMirror> proposedTypes = new ArrayList<TypeMirror>();
        int[] proposedIndex = new int[1];
        List<ExecutableElement> ee = org.netbeans.modules.editor.java.Utilities.fuzzyResolveMethodInvocation(info, parent, proposedTypes, proposedIndex);
        
        if (ee.isEmpty()) { //cannot be resolved
            TypeMirror executable = info.getTrees().getTypeMirror(new TreePath(parent, nat.getMethodSelect()));
            
            if (executable == null || executable.getKind() != TypeKind.EXECUTABLE) return null;
            
            ExecutableType et = (ExecutableType) executable;
            
            if (realArgumentError >= et.getParameterTypes().size()) {
                return null;
            }
            
            proposedTypes.add(et.getParameterTypes().get(realArgumentError));
        }
        
        types.add(ElementKind.PARAMETER);
        types.add(ElementKind.LOCAL_VARIABLE);
        types.add(ElementKind.FIELD);
        
        return proposedTypes;
    }
    
    return null;
}
 

@Override
public Description matchMethodInvocation(MethodInvocationTree tree, VisitorState state) {
  if (!matchWithinClass) {
    return Description.NO_MATCH;
  }
  final Symbol.MethodSymbol methodSymbol = ASTHelpers.getSymbol(tree);
  if (methodSymbol == null) {
    throw new RuntimeException("not expecting unresolved method here");
  }
  handler.onMatchMethodInvocation(this, tree, state, methodSymbol);
  // assuming this list does not include the receiver
  List<? extends ExpressionTree> actualParams = tree.getArguments();
  return handleInvocation(tree, state, methodSymbol, actualParams);
}
 

/**
 * @param path tree path to read operation
 * @return true if it is permissible to perform this read before the field has been initialized,
 *     false otherwise
 */
private boolean okToReadBeforeInitialized(TreePath path) {
  TreePath parentPath = path.getParentPath();
  Tree leaf = path.getLeaf();
  Tree parent = parentPath.getLeaf();
  if (parent instanceof AssignmentTree) {
    // ok if it's actually a write
    AssignmentTree assignment = (AssignmentTree) parent;
    return assignment.getVariable().equals(leaf);
  } else if (parent instanceof BinaryTree) {
    // ok if we're comparing to null
    BinaryTree binaryTree = (BinaryTree) parent;
    Tree.Kind kind = binaryTree.getKind();
    if (kind.equals(Tree.Kind.EQUAL_TO) || kind.equals(Tree.Kind.NOT_EQUAL_TO)) {
      ExpressionTree left = binaryTree.getLeftOperand();
      ExpressionTree right = binaryTree.getRightOperand();
      return (left.equals(leaf) && right.getKind().equals(Tree.Kind.NULL_LITERAL))
          || (right.equals(leaf) && left.getKind().equals(Tree.Kind.NULL_LITERAL));
    }
  } else if (parent instanceof MethodInvocationTree) {
    // ok if it's invoking castToNonNull and the read is the argument
    MethodInvocationTree methodInvoke = (MethodInvocationTree) parent;
    Symbol.MethodSymbol methodSymbol = ASTHelpers.getSymbol(methodInvoke);
    String qualifiedName =
        ASTHelpers.enclosingClass(methodSymbol) + "." + methodSymbol.getSimpleName().toString();
    if (qualifiedName.equals(config.getCastToNonNullMethod())) {
      List<? extends ExpressionTree> arguments = methodInvoke.getArguments();
      return arguments.size() == 1 && leaf.equals(arguments.get(0));
    }
  }
  return false;
}
 

private static boolean checkMethodInvocation(HintContext ctx, TreePath invPath, TreePath valPath) {
    Trees trees = ctx.getInfo().getTrees();
    Tree invLeaf = invPath.getLeaf();
    List<? extends ExpressionTree> arguments;
    TypeMirror m;
    
    switch (invLeaf.getKind()) {
        case METHOD_INVOCATION: {
            MethodInvocationTree mit = (MethodInvocationTree)invLeaf;
            arguments = mit.getArguments();
            m = trees.getTypeMirror(new TreePath(invPath, mit.getMethodSelect()));
            break;
        }
        case NEW_CLASS: {
            NewClassTree nct = (NewClassTree)invLeaf;
            arguments = nct.getArguments();
            Element e = trees.getElement(invPath);
            TypeMirror cl = trees.getTypeMirror(invPath);
            if (!Utilities.isValidType(cl) || cl.getKind().isPrimitive()) {
                return false;
            }
            m = ctx.getInfo().getTypes().asMemberOf((DeclaredType)cl, e);
            break;
        }
        default:
            return false;
    }
    
    if (!Utilities.isValidType(m) || m.getKind() != TypeKind.EXECUTABLE) {
        return false;
    }
    ExecutableType execType = (ExecutableType)m;
    int idx = arguments.indexOf(ctx.getPath().getLeaf());
    if (idx < 0 || idx >= execType.getParameterTypes().size()) {
        return false;
    }
    TypeMirror paramType = execType.getParameterTypes().get(idx);
    TypeMirror curType = trees.getTypeMirror(ctx.getPath());
    TypeMirror valType = trees.getTypeMirror(valPath);
    
    if (!paramType.getKind().isPrimitive() && valType.getKind().isPrimitive()) {
        valType = ctx.getInfo().getTypes().boxedClass((PrimitiveType)valType).asType();
        // ensure that the passed INSTANCE type will not change when the boxing is removed
        if (!ctx.getInfo().getTypes().isSameType(curType, valType)) {
            return false;
        }
    }
            
    return Utilities.checkAlternativeInvocation(ctx.getInfo(), invPath, ctx.getPath(), valPath, null);
}
 

@Override protected void performRewrite(JavaFix.TransformationContext ctx) throws Exception {
    WorkingCopy wc = ctx.getWorkingCopy();
    TreePath treePath = ctx.getPath();
            TreeMaker make = wc.getTreeMaker();
            if (treePath.getLeaf().getKind() == Kind.METHOD_INVOCATION) {
                MethodInvocationTree mit = (MethodInvocationTree) treePath.getLeaf();
                CompilationUnitTree cut = wc.getCompilationUnit();
                boolean imported = false;
                String importBundleStar = cut.getPackageName() + ".Bundle.*";
                for (ImportTree it : cut.getImports()) {
                    if (it.isStatic() && it.getQualifiedIdentifier().toString().equals(importBundleStar)) {
                        imported = true;
                        break;
                    }
                }
                if (!imported) {
                    wc.rewrite(cut, make.addCompUnitImport(cut, make.Import(make.Identifier(importBundleStar), true)));
                }
                List<? extends ExpressionTree> args = mit.getArguments();
                List<? extends ExpressionTree> params;
                if (args.size() == 3 && args.get(2).getKind() == Kind.NEW_ARRAY) {
                    params = ((NewArrayTree) args.get(2)).getInitializers();
                } else {
                    params = args.subList(2, args.size());
                }
                wc.rewrite(mit, make.MethodInvocation(Collections.<ExpressionTree>emptyList(), make.Identifier(toIdentifier(key)), params));
            } // else annotation value, nothing to change
            if (!isAlreadyRegistered) {
                EditableProperties ep = new EditableProperties(true);
                InputStream is = ctx.getResourceContent(bundleProperties);
                try {
                    ep.load(is);
                } finally {
                    is.close();
                }
                List<ExpressionTree> lines = new ArrayList<ExpressionTree>();
                for (String comment : ep.getComment(key)) {
                    lines.add(make.Literal(comment));
                }
                lines.add(make.Literal(key + '=' + ep.remove(key)));
                TypeElement nbBundleMessages = wc.getElements().getTypeElement("org.openide.util.NbBundle.Messages");
                if (nbBundleMessages == null) {
                    throw new IllegalArgumentException("cannot resolve org.openide.util.NbBundle.Messages");
                }
                GeneratorUtilities gu = GeneratorUtilities.get(wc);
                Tree enclosing = findEnclosingElement(wc, treePath);
                Tree modifiers;
                Tree nueModifiers;
                ExpressionTree[] linesA = lines.toArray(new ExpressionTree[lines.size()]);
                switch (enclosing.getKind()) {
                case METHOD:
                    modifiers = wc.resolveRewriteTarget(((MethodTree) enclosing).getModifiers());
                    nueModifiers = gu.appendToAnnotationValue((ModifiersTree) modifiers, nbBundleMessages, "value", linesA);
                    break;
                case VARIABLE:
                    modifiers = wc.resolveRewriteTarget(((VariableTree) enclosing).getModifiers());
                    nueModifiers = gu.appendToAnnotationValue((ModifiersTree) modifiers, nbBundleMessages, "value", linesA);
                    break;
                case COMPILATION_UNIT:
                    modifiers = wc.resolveRewriteTarget(enclosing);
                    nueModifiers = gu.appendToAnnotationValue((CompilationUnitTree) modifiers, nbBundleMessages, "value", linesA);
                    break;
                default:
                    modifiers = wc.resolveRewriteTarget(((ClassTree) enclosing).getModifiers());
                    nueModifiers = gu.appendToAnnotationValue((ModifiersTree) modifiers, nbBundleMessages, "value", linesA);
                }
                wc.rewrite(modifiers, nueModifiers);
            // XXX remove NbBundle import if now unused
            OutputStream os = ctx.getResourceOutput(bundleProperties);
            try {
                ep.store(os);
            } finally {
                os.close();
            }
        }
    // XXX after JavaFix rewrite, Savable.save (on DataObject.find(src)) no longer works (JG13 again)
}
 

private List<Documentation> documentationImpl(String code, int cursor, boolean computeJavadoc) {
    code = code.substring(0, cursor);
    if (code.trim().isEmpty()) { //TODO: comment handling
        code += ";";
    }

    if (guessKind(code) == Kind.IMPORT)
        return Collections.emptyList();

    OuterWrap codeWrap = proc.outerMap.wrapInTrialClass(Wrap.methodWrap(code));
    AnalyzeTask at = proc.taskFactory.new AnalyzeTask(codeWrap, keepParameterNames);
    SourcePositions sp = at.trees().getSourcePositions();
    CompilationUnitTree topLevel = at.firstCuTree();
    TreePath tp = pathFor(topLevel, sp, codeWrap.snippetIndexToWrapIndex(cursor));

    if (tp == null)
        return Collections.emptyList();

    TreePath prevPath = null;
    while (tp != null && tp.getLeaf().getKind() != Kind.METHOD_INVOCATION &&
           tp.getLeaf().getKind() != Kind.NEW_CLASS && tp.getLeaf().getKind() != Kind.IDENTIFIER &&
           tp.getLeaf().getKind() != Kind.MEMBER_SELECT) {
        prevPath = tp;
        tp = tp.getParentPath();
    }

    if (tp == null)
        return Collections.emptyList();

    Stream<Element> elements;
    Iterable<Pair<ExecutableElement, ExecutableType>> candidates;
    List<? extends ExpressionTree> arguments;

    if (tp.getLeaf().getKind() == Kind.METHOD_INVOCATION || tp.getLeaf().getKind() == Kind.NEW_CLASS) {
        if (tp.getLeaf().getKind() == Kind.METHOD_INVOCATION) {
            MethodInvocationTree mit = (MethodInvocationTree) tp.getLeaf();
            candidates = methodCandidates(at, tp);
            arguments = mit.getArguments();
        } else {
            NewClassTree nct = (NewClassTree) tp.getLeaf();
            candidates = newClassCandidates(at, tp);
            arguments = nct.getArguments();
        }

        if (!isEmptyArgumentsContext(arguments)) {
            List<TypeMirror> actuals = computeActualInvocationTypes(at, arguments, prevPath);
            List<TypeMirror> fullActuals = actuals != null ? actuals : Collections.emptyList();

            candidates =
                    this.filterExecutableTypesByArguments(at, candidates, fullActuals)
                        .stream()
                        .filter(method -> parameterType(method.fst, method.snd, fullActuals.size(), true).findAny().isPresent())
                        .collect(Collectors.toList());
        }

        elements = Util.stream(candidates).map(method -> method.fst);
    } else if (tp.getLeaf().getKind() == Kind.IDENTIFIER || tp.getLeaf().getKind() == Kind.MEMBER_SELECT) {
        Element el = at.trees().getElement(tp);

        if (el == null ||
            el.asType().getKind() == TypeKind.ERROR ||
            (el.getKind() == ElementKind.PACKAGE && el.getEnclosedElements().isEmpty())) {
            //erroneous element:
            return Collections.emptyList();
        }

        elements = Stream.of(el);
    } else {
        return Collections.emptyList();
    }

    List<Documentation> result = Collections.emptyList();

    try (JavadocHelper helper = JavadocHelper.create(at.task, findSources())) {
        result = elements.map(el -> constructDocumentation(at, helper, el, computeJavadoc))
                         .filter(Objects::nonNull)
                         .collect(Collectors.toList());
    } catch (IOException ex) {
        proc.debug(ex, "JavadocHelper.close()");
    }

    return result;
}