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

Example 66 with IBinding

use of org.eclipse.jdt.core.dom.IBinding 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 67 with IBinding

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

the class ConvertForLoopOperation method validateExpression.

/*
	 * Must be one of:
	 * <ul>
	 * <li>[indexBinding] < [result].length;</li>
	 * <li>[result].length > [indexBinding];</li>
	 * <li>[indexBinding] < [lengthBinding];</li>
	 * <li>[lengthBinding] > [indexBinding];</li>
	 * </ul>
	 */
private boolean validateExpression(ForStatement statement) {
    Expression expression = statement.getExpression();
    if (!(expression instanceof InfixExpression))
        return false;
    InfixExpression infix = (InfixExpression) expression;
    Expression left = infix.getLeftOperand();
    Expression right = infix.getRightOperand();
    if (left instanceof SimpleName && right instanceof SimpleName) {
        IVariableBinding lengthBinding = fLengthBinding;
        if (lengthBinding == null)
            return false;
        IBinding leftBinding = ((SimpleName) left).resolveBinding();
        IBinding righBinding = ((SimpleName) right).resolveBinding();
        if (fIndexBinding.equals(leftBinding)) {
            return lengthBinding.equals(righBinding);
        } else if (fIndexBinding.equals(righBinding)) {
            return lengthBinding.equals(leftBinding);
        }
        return false;
    } else if (left instanceof SimpleName) {
        if (!fIndexBinding.equals(((SimpleName) left).resolveBinding()))
            return false;
        if (!Operator.LESS.equals(infix.getOperator()))
            return false;
        return validateLengthQuery(right);
    } else if (right instanceof SimpleName) {
        if (!fIndexBinding.equals(((SimpleName) right).resolveBinding()))
            return false;
        if (!Operator.GREATER.equals(infix.getOperator()))
            return false;
        return validateLengthQuery(left);
    }
    return false;
}

Example 68 with IBinding

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

the class ConvertForLoopOperation method validateUpdaters.

/*
	 * Must be one of:
	 * <ul>
	 * <li>[indexBinding]++</li>
	 * <li>++[indexBinding]</li>
	 * <li>[indexBinding]+= 1</li>
	 * <li>[indexBinding]= [indexBinding] + 1</li>
	 * <li>[indexBinding]= 1 + [indexBinding]</li>
	 * <ul>
	 */
private boolean validateUpdaters(ForStatement statement) {
    List<Expression> updaters = statement.updaters();
    if (updaters.size() != 1)
        return false;
    Expression updater = updaters.get(0);
    if (updater instanceof PostfixExpression) {
        PostfixExpression postfix = (PostfixExpression) updater;
        if (!PostfixExpression.Operator.INCREMENT.equals(postfix.getOperator()))
            return false;
        IBinding binding = getBinding(postfix.getOperand());
        if (!fIndexBinding.equals(binding))
            return false;
        return true;
    } else if (updater instanceof PrefixExpression) {
        PrefixExpression prefix = (PrefixExpression) updater;
        if (!PrefixExpression.Operator.INCREMENT.equals(prefix.getOperator()))
            return false;
        IBinding binding = getBinding(prefix.getOperand());
        if (!fIndexBinding.equals(binding))
            return false;
        return true;
    } else if (updater instanceof Assignment) {
        Assignment assignment = (Assignment) updater;
        Expression left = assignment.getLeftHandSide();
        IBinding binding = getBinding(left);
        if (!fIndexBinding.equals(binding))
            return false;
        if (Assignment.Operator.PLUS_ASSIGN.equals(assignment.getOperator())) {
            return isOneLiteral(assignment.getRightHandSide());
        } else if (Assignment.Operator.ASSIGN.equals(assignment.getOperator())) {
            Expression right = assignment.getRightHandSide();
            if (!(right instanceof InfixExpression))
                return false;
            InfixExpression infixExpression = (InfixExpression) right;
            Expression leftOperand = infixExpression.getLeftOperand();
            IBinding leftBinding = getBinding(leftOperand);
            Expression rightOperand = infixExpression.getRightOperand();
            IBinding rightBinding = getBinding(rightOperand);
            if (fIndexBinding.equals(leftBinding)) {
                return isOneLiteral(rightOperand);
            } else if (fIndexBinding.equals(rightBinding)) {
                return isOneLiteral(leftOperand);
            }
        }
    }
    return false;
}

Example 69 with IBinding

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

the class JdtASTMatcher method match.

@Override
public boolean match(SimpleName node, Object other) {
    boolean isomorphic = super.match(node, other);
    if (!isomorphic || !(other instanceof SimpleName))
        return false;
    SimpleName name = (SimpleName) other;
    IBinding nodeBinding = node.resolveBinding();
    IBinding otherBinding = name.resolveBinding();
    if (nodeBinding == null) {
        if (otherBinding != null) {
            return false;
        }
    } else {
        if (nodeBinding != otherBinding) {
            return false;
        }
    }
    if (node.resolveTypeBinding() != name.resolveTypeBinding())
        return false;
    return true;
}

Example 70 with IBinding

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

the class ScopeAnalyzer method getUsedVariableNames.

public Collection<String> getUsedVariableNames(int offset, int length) {
    HashSet<String> result = new HashSet<String>();
    IBinding[] bindingsBefore = getDeclarationsInScope(offset, VARIABLES);
    for (int i = 0; i < bindingsBefore.length; i++) {
        result.add(bindingsBefore[i].getName());
    }
    IBinding[] bindingsAfter = getDeclarationsAfter(offset + length, VARIABLES);
    for (int i = 0; i < bindingsAfter.length; i++) {
        result.add(bindingsAfter[i].getName());
    }
    List<ImportDeclaration> imports = fRoot.imports();
    for (int i = 0; i < imports.size(); i++) {
        ImportDeclaration decl = imports.get(i);
        if (decl.isStatic() && !decl.isOnDemand()) {
            result.add(ASTNodes.getSimpleNameIdentifier(decl.getName()));
        }
    }
    return result;
}