Examples with ForStatement org.eclipse.jdt.core.dom.ForStatement used on opensource projects

Example 16 with ForStatement

use of org.eclipse.jdt.core.dom.ForStatement in project che by eclipse.

the class ConvertIterableLoopOperation method satisfiesPreconditions.

/**
	 * Is this proposal applicable?
	 *
	 * @return A status with severity <code>IStatus.Error</code> if not
	 *         applicable
	 */
@Override
public final IStatus satisfiesPreconditions() {
    IStatus resultStatus = StatusInfo.OK_STATUS;
    if (JavaModelUtil.is50OrHigher(getJavaProject())) {
        resultStatus = checkExpressionCondition();
        if (resultStatus.getSeverity() == IStatus.ERROR)
            return resultStatus;
        List<Expression> updateExpressions = getForStatement().updaters();
        if (updateExpressions.size() == 1) {
            resultStatus = new StatusInfo(IStatus.WARNING, Messages.format(FixMessages.ConvertIterableLoopOperation_RemoveUpdateExpression_Warning, BasicElementLabels.getJavaCodeString(updateExpressions.get(0).toString())));
        } else if (updateExpressions.size() > 1) {
            resultStatus = new StatusInfo(IStatus.WARNING, FixMessages.ConvertIterableLoopOperation_RemoveUpdateExpressions_Warning);
        }
        for (final Iterator<Expression> outer = getForStatement().initializers().iterator(); outer.hasNext(); ) {
            final Expression initializer = outer.next();
            if (initializer instanceof VariableDeclarationExpression) {
                final VariableDeclarationExpression declaration = (VariableDeclarationExpression) initializer;
                List<VariableDeclarationFragment> fragments = declaration.fragments();
                if (fragments.size() != 1) {
                    //$NON-NLS-1$
                    return new StatusInfo(IStatus.ERROR, "");
                } else {
                    final VariableDeclarationFragment fragment = fragments.get(0);
                    fragment.accept(new ASTVisitor() {

                        @Override
                        public final boolean visit(final MethodInvocation node) {
                            final IMethodBinding binding = node.resolveMethodBinding();
                            if (binding != null) {
                                final ITypeBinding type = binding.getReturnType();
                                if (type != null) {
                                    final String qualified = type.getQualifiedName();
                                    if (qualified.startsWith("java.util.Enumeration<") || qualified.startsWith("java.util.Iterator<")) {
                                        //$NON-NLS-1$ //$NON-NLS-2$
                                        final Expression qualifier = node.getExpression();
                                        if (qualifier != null) {
                                            final ITypeBinding resolved = qualifier.resolveTypeBinding();
                                            if (resolved != null) {
                                                //$NON-NLS-1$
                                                final ITypeBinding iterable = getSuperType(resolved, "java.lang.Iterable");
                                                if (iterable != null) {
                                                    fExpression = qualifier;
                                                    fIterable = resolved;
                                                }
                                            }
                                        } else {
                                            final ITypeBinding declaring = binding.getDeclaringClass();
                                            if (declaring != null) {
                                                //$NON-NLS-1$
                                                final ITypeBinding superBinding = getSuperType(declaring, "java.lang.Iterable");
                                                if (superBinding != null) {
                                                    fIterable = superBinding;
                                                    fThis = true;
                                                }
                                            }
                                        }
                                    }
                                }
                            }
                            return true;
                        }

                        @Override
                        public final boolean visit(final VariableDeclarationFragment node) {
                            final IVariableBinding binding = node.resolveBinding();
                            if (binding != null) {
                                final ITypeBinding type = binding.getType();
                                if (type != null) {
                                    //$NON-NLS-1$
                                    ITypeBinding iterator = getSuperType(type, "java.util.Iterator");
                                    if (iterator != null)
                                        fIteratorVariable = binding;
                                    else {
                                        //$NON-NLS-1$
                                        iterator = getSuperType(type, "java.util.Enumeration");
                                        if (iterator != null)
                                            fIteratorVariable = binding;
                                    }
                                }
                            }
                            return true;
                        }
                    });
                }
            }
        }
        final Statement statement = getForStatement().getBody();
        final boolean[] otherInvocationThenNext = new boolean[] { false };
        final int[] nextInvocationCount = new int[] { 0 };
        if (statement != null && fIteratorVariable != null) {
            final ITypeBinding elementType = getElementType(fIteratorVariable.getType());
            statement.accept(new ASTVisitor() {

                @Override
                public boolean visit(SimpleName node) {
                    IBinding nodeBinding = node.resolveBinding();
                    if (fElementVariable != null && fElementVariable.equals(nodeBinding)) {
                        fMakeFinal = false;
                    }
                    if (nodeBinding == fIteratorVariable) {
                        if (node.getLocationInParent() == MethodInvocation.EXPRESSION_PROPERTY) {
                            MethodInvocation invocation = (MethodInvocation) node.getParent();
                            String name = invocation.getName().getIdentifier();
                            if (name.equals("next") || name.equals("nextElement")) {
                                //$NON-NLS-1$ //$NON-NLS-2$
                                nextInvocationCount[0]++;
                                Expression left = null;
                                if (invocation.getLocationInParent() == Assignment.RIGHT_HAND_SIDE_PROPERTY) {
                                    left = ((Assignment) invocation.getParent()).getLeftHandSide();
                                } else if (invocation.getLocationInParent() == VariableDeclarationFragment.INITIALIZER_PROPERTY) {
                                    left = ((VariableDeclarationFragment) invocation.getParent()).getName();
                                }
                                return visitElementVariable(left);
                            }
                        }
                        otherInvocationThenNext[0] = true;
                    }
                    return true;
                }

                private boolean visitElementVariable(final Expression node) {
                    if (node != null) {
                        final ITypeBinding binding = node.resolveTypeBinding();
                        if (binding != null && elementType.equals(binding)) {
                            if (node instanceof Name) {
                                final Name name = (Name) node;
                                final IBinding result = name.resolveBinding();
                                if (result != null) {
                                    fOccurrences.add(node);
                                    fElementVariable = result;
                                    return false;
                                }
                            } else if (node instanceof FieldAccess) {
                                final FieldAccess access = (FieldAccess) node;
                                final IBinding result = access.resolveFieldBinding();
                                if (result != null) {
                                    fOccurrences.add(node);
                                    fElementVariable = result;
                                    return false;
                                }
                            }
                        }
                    }
                    return true;
                }
            });
            if (otherInvocationThenNext[0])
                return ERROR_STATUS;
            if (nextInvocationCount[0] > 1)
                return ERROR_STATUS;
            if (fElementVariable != null) {
                statement.accept(new ASTVisitor() {

                    @Override
                    public final boolean visit(final VariableDeclarationFragment node) {
                        if (node.getInitializer() instanceof NullLiteral) {
                            SimpleName name = node.getName();
                            if (elementType.equals(name.resolveTypeBinding()) && fElementVariable.equals(name.resolveBinding())) {
                                fOccurrences.add(name);
                            }
                        }
                        return true;
                    }
                });
            }
        }
        final ASTNode root = getForStatement().getRoot();
        if (root != null) {
            root.accept(new ASTVisitor() {

                @Override
                public final boolean visit(final ForStatement node) {
                    return false;
                }

                @Override
                public final boolean visit(final SimpleName node) {
                    final IBinding binding = node.resolveBinding();
                    if (binding != null && binding.equals(fElementVariable))
                        fAssigned = true;
                    return false;
                }
            });
        }
    }
    if ((fExpression != null || fThis) && fIterable != null && fIteratorVariable != null && !fAssigned) {
        return resultStatus;
    } else {
        return ERROR_STATUS;
    }
}

Example 17 with ForStatement

use of org.eclipse.jdt.core.dom.ForStatement in project che by eclipse.

the class ConvertLoopOperation method getUsedVariableNames.

protected String[] getUsedVariableNames() {
    final List<String> results = new ArrayList<String>();
    ForStatement forStatement = getForStatement();
    CompilationUnit root = (CompilationUnit) forStatement.getRoot();
    Collection<String> variableNames = new ScopeAnalyzer(root).getUsedVariableNames(forStatement.getStartPosition(), forStatement.getLength());
    results.addAll(variableNames);
    forStatement.accept(new GenericVisitor() {

        @Override
        public boolean visit(SingleVariableDeclaration node) {
            results.add(node.getName().getIdentifier());
            return super.visit(node);
        }

        @Override
        public boolean visit(VariableDeclarationFragment fragment) {
            results.add(fragment.getName().getIdentifier());
            return super.visit(fragment);
        }
    });
    results.addAll(Arrays.asList(fUsedNames));
    return results.toArray(new String[results.size()]);
}

Example 18 with ForStatement

use of org.eclipse.jdt.core.dom.ForStatement in project che by eclipse.

the class ControlStatementsFix method createRemoveBlockFix.

public static ControlStatementsFix[] createRemoveBlockFix(CompilationUnit compilationUnit, ASTNode node) {
    if (!(node instanceof Statement)) {
        return null;
    }
    Statement statement = (Statement) node;
    if (statement instanceof Block) {
        Block block = (Block) statement;
        if (block.statements().size() != 1)
            return null;
        ASTNode parent = block.getParent();
        if (!(parent instanceof Statement))
            return null;
        statement = (Statement) parent;
    }
    if (statement instanceof IfStatement) {
        List<ControlStatementsFix> result = new ArrayList<ControlStatementsFix>();
        List<RemoveBlockOperation> removeAllList = new ArrayList<RemoveBlockOperation>();
        IfElseIterator iter = new IfElseIterator((IfStatement) statement);
        IfStatement item = null;
        while (iter.hasNext()) {
            item = iter.next();
            if (RemoveBlockOperation.satisfiesQuickAssistPrecondition(item, IfStatement.THEN_STATEMENT_PROPERTY)) {
                RemoveBlockOperation op = new RemoveBlockOperation(item, IfStatement.THEN_STATEMENT_PROPERTY);
                removeAllList.add(op);
                if (item == statement)
                    result.add(new ControlStatementsFix(FixMessages.ControlStatementsFix_removeIfBlock_proposalDescription, compilationUnit, new CompilationUnitRewriteOperation[] { op }));
            }
        }
        if (RemoveBlockOperation.satisfiesQuickAssistPrecondition(item, IfStatement.ELSE_STATEMENT_PROPERTY)) {
            RemoveBlockOperation op = new RemoveBlockOperation(item, IfStatement.ELSE_STATEMENT_PROPERTY);
            removeAllList.add(op);
            if (item == statement)
                result.add(new ControlStatementsFix(FixMessages.ControlStatementsFix_removeElseBlock_proposalDescription, compilationUnit, new CompilationUnitRewriteOperation[] { op }));
        }
        if (removeAllList.size() > 1) {
            CompilationUnitRewriteOperation[] allConvert = removeAllList.toArray(new CompilationUnitRewriteOperation[removeAllList.size()]);
            result.add(new ControlStatementsFix(FixMessages.ControlStatementsFix_removeIfElseBlock_proposalDescription, compilationUnit, allConvert));
        }
        return result.toArray(new ControlStatementsFix[result.size()]);
    } else if (statement instanceof WhileStatement) {
        if (RemoveBlockOperation.satisfiesQuickAssistPrecondition(statement, WhileStatement.BODY_PROPERTY)) {
            RemoveBlockOperation op = new RemoveBlockOperation(statement, WhileStatement.BODY_PROPERTY);
            return new ControlStatementsFix[] { new ControlStatementsFix(FixMessages.ControlStatementsFix_removeBrackets_proposalDescription, compilationUnit, new CompilationUnitRewriteOperation[] { op }) };
        }
    } else if (statement instanceof ForStatement) {
        if (RemoveBlockOperation.satisfiesQuickAssistPrecondition(statement, ForStatement.BODY_PROPERTY)) {
            RemoveBlockOperation op = new RemoveBlockOperation(statement, ForStatement.BODY_PROPERTY);
            return new ControlStatementsFix[] { new ControlStatementsFix(FixMessages.ControlStatementsFix_removeBrackets_proposalDescription, compilationUnit, new CompilationUnitRewriteOperation[] { op }) };
        }
    } else if (statement instanceof EnhancedForStatement) {
        if (RemoveBlockOperation.satisfiesQuickAssistPrecondition(statement, EnhancedForStatement.BODY_PROPERTY)) {
            RemoveBlockOperation op = new RemoveBlockOperation(statement, EnhancedForStatement.BODY_PROPERTY);
            return new ControlStatementsFix[] { new ControlStatementsFix(FixMessages.ControlStatementsFix_removeBrackets_proposalDescription, compilationUnit, new CompilationUnitRewriteOperation[] { op }) };
        }
    } else if (statement instanceof DoStatement) {
        if (RemoveBlockOperation.satisfiesQuickAssistPrecondition(statement, DoStatement.BODY_PROPERTY)) {
            RemoveBlockOperation op = new RemoveBlockOperation(statement, DoStatement.BODY_PROPERTY);
            return new ControlStatementsFix[] { new ControlStatementsFix(FixMessages.ControlStatementsFix_removeBrackets_proposalDescription, compilationUnit, new CompilationUnitRewriteOperation[] { op }) };
        }
    }
    return null;
}

Example 19 with ForStatement

use of org.eclipse.jdt.core.dom.ForStatement in project che by eclipse.

the class ConvertForLoopOperation method getIntroducedVariableName.

@Override
public String getIntroducedVariableName() {
    if (fElementDeclaration != null) {
        return fElementDeclaration.getName().getIdentifier();
    } else {
        ForStatement forStatement = getForStatement();
        IJavaProject javaProject = ((CompilationUnit) forStatement.getRoot()).getJavaElement().getJavaProject();
        String[] proposals = getVariableNameProposals(fArrayAccess.resolveTypeBinding(), javaProject);
        return proposals[0];
    }
}

Example 20 with ForStatement

use of org.eclipse.jdt.core.dom.ForStatement in project che by eclipse.

the class ConvertForLoopOperation method convert.

@Override
protected Statement convert(CompilationUnitRewrite cuRewrite, TextEditGroup group, LinkedProposalModel positionGroups) throws CoreException {
    ASTRewrite rewrite = cuRewrite.getASTRewrite();
    ImportRewrite importRewrite = cuRewrite.getImportRewrite();
    ForStatement forStatement = getForStatement();
    IJavaProject javaProject = ((CompilationUnit) forStatement.getRoot()).getJavaElement().getJavaProject();
    String[] proposals = getVariableNameProposals(fArrayAccess.resolveTypeBinding(), javaProject);
    String parameterName;
    if (fElementDeclaration != null) {
        parameterName = fElementDeclaration.getName().getIdentifier();
    } else {
        parameterName = proposals[0];
    }
    LinkedProposalPositionGroup pg = positionGroups.getPositionGroup(parameterName, true);
    if (fElementDeclaration != null)
        pg.addProposal(parameterName, null, 10);
    for (int i = 0; i < proposals.length; i++) {
        pg.addProposal(proposals[i], null, 10);
    }
    AST ast = forStatement.getAST();
    EnhancedForStatement result = ast.newEnhancedForStatement();
    SingleVariableDeclaration parameterDeclaration = createParameterDeclaration(parameterName, fElementDeclaration, fArrayAccess, forStatement, importRewrite, rewrite, group, pg, fMakeFinal);
    result.setParameter(parameterDeclaration);
    result.setExpression((Expression) rewrite.createCopyTarget(fArrayAccess));
    convertBody(forStatement.getBody(), fIndexBinding, fArrayBinding, parameterName, rewrite, group, pg);
    result.setBody(getBody(cuRewrite, group, positionGroups));
    positionGroups.setEndPosition(rewrite.track(result));
    return result;
}