Examples with CatchStatement org.codehaus.groovy.ast.stmt.CatchStatement used on opensource projects

Example 16 with CatchStatement

use of org.codehaus.groovy.ast.stmt.CatchStatement in project groovy by apache.

the class FinalVariableAnalyzer method visitCatchFinally.

private void visitCatchFinally(Map<Variable, VariableState> initialVarState, List<Map<Variable, VariableState>> afterTryCatchStates, CatchStatement catchStatement, Statement finallyStatement) {
    pushState();
    getState().putAll(initialVarState);
    Statement code = catchStatement.getCode();
    catchStatement.visit(this);
    finallyStatement.visit(this);
    if (code == null || !returningBlock(code)) {
        afterTryCatchStates.add(new HashMap<>(getState()));
    }
    popState();
}

Example 17 with CatchStatement

use of org.codehaus.groovy.ast.stmt.CatchStatement in project groovy by apache.

the class AstBuilder method visitTryCatchStatement.

@Override
public Statement visitTryCatchStatement(final TryCatchStatementContext ctx) {
    boolean resourcesExists = asBoolean(ctx.resources());
    boolean catchExists = asBoolean(ctx.catchClause());
    boolean finallyExists = asBoolean(ctx.finallyBlock());
    if (!(resourcesExists || catchExists || finallyExists)) {
        throw createParsingFailedException("Either a catch or finally clause or both is required for a try-catch-finally statement", ctx);
    }
    TryCatchStatement tryCatchStatement = new TryCatchStatement((Statement) this.visit(ctx.block()), this.visitFinallyBlock(ctx.finallyBlock()));
    if (resourcesExists) {
        this.visitResources(ctx.resources()).forEach(tryCatchStatement::addResource);
    }
    ctx.catchClause().stream().map(this::visitCatchClause).reduce(new LinkedList<>(), (r, e) -> {
        // merge several LinkedList<CatchStatement> instances into one LinkedList<CatchStatement> instance
        r.addAll(e);
        return r;
    }).forEach(tryCatchStatement::addCatch);
    return configureAST(tryWithResourcesASTTransformation.transform(configureAST(tryCatchStatement, ctx)), ctx);
}

Example 18 with CatchStatement

use of org.codehaus.groovy.ast.stmt.CatchStatement in project groovy-core by groovy.

the class CategoryASTTransformation method visit.

/**
 * Property invocations done on 'this' reference are transformed so that the invocations at runtime are
 * done on the additional parameter 'self'
 */
public void visit(ASTNode[] nodes, final SourceUnit source) {
    if (nodes.length != 2 || !(nodes[0] instanceof AnnotationNode) || !(nodes[1] instanceof ClassNode)) {
        source.getErrorCollector().addError(new SyntaxErrorMessage(new SyntaxException("@Category can only be added to a ClassNode but got: " + (nodes.length == 2 ? nodes[1] : "nothing"), nodes[0].getLineNumber(), nodes[0].getColumnNumber()), source));
    }
    AnnotationNode annotation = (AnnotationNode) nodes[0];
    ClassNode parent = (ClassNode) nodes[1];
    ClassNode targetClass = getTargetClass(source, annotation);
    thisExpression.setType(targetClass);
    final LinkedList<Set<String>> varStack = new LinkedList<Set<String>>();
    if (!ensureNoInstanceFieldOrProperty(source, parent))
        return;
    Set<String> names = new HashSet<String>();
    for (FieldNode field : parent.getFields()) {
        names.add(field.getName());
    }
    for (PropertyNode field : parent.getProperties()) {
        names.add(field.getName());
    }
    varStack.add(names);
    final Reference parameter = new Reference();
    final ClassCodeExpressionTransformer expressionTransformer = new ClassCodeExpressionTransformer() {

        protected SourceUnit getSourceUnit() {
            return source;
        }

        private void addVariablesToStack(Parameter[] params) {
            Set<String> names = new HashSet<String>();
            names.addAll(varStack.getLast());
            for (Parameter param : params) {
                names.add(param.getName());
            }
            varStack.add(names);
        }

        @Override
        public void visitCatchStatement(CatchStatement statement) {
            varStack.getLast().add(statement.getVariable().getName());
            super.visitCatchStatement(statement);
            varStack.getLast().remove(statement.getVariable().getName());
        }

        @Override
        public void visitMethod(MethodNode node) {
            addVariablesToStack(node.getParameters());
            super.visitMethod(node);
            varStack.removeLast();
        }

        @Override
        public void visitBlockStatement(BlockStatement block) {
            Set<String> names = new HashSet<String>();
            names.addAll(varStack.getLast());
            varStack.add(names);
            super.visitBlockStatement(block);
            varStack.remove(names);
        }

        @Override
        public void visitClosureExpression(ClosureExpression ce) {
            addVariablesToStack(ce.getParameters());
            super.visitClosureExpression(ce);
            varStack.removeLast();
        }

        @Override
        public void visitDeclarationExpression(DeclarationExpression expression) {
            if (expression.isMultipleAssignmentDeclaration()) {
                TupleExpression te = expression.getTupleExpression();
                List<Expression> list = te.getExpressions();
                for (Expression arg : list) {
                    VariableExpression ve = (VariableExpression) arg;
                    varStack.getLast().add(ve.getName());
                }
            } else {
                VariableExpression ve = expression.getVariableExpression();
                varStack.getLast().add(ve.getName());
            }
            super.visitDeclarationExpression(expression);
        }

        @Override
        public void visitForLoop(ForStatement forLoop) {
            Expression exp = forLoop.getCollectionExpression();
            exp.visit(this);
            Parameter loopParam = forLoop.getVariable();
            if (loopParam != null) {
                varStack.getLast().add(loopParam.getName());
            }
            super.visitForLoop(forLoop);
        }

        @Override
        public void visitExpressionStatement(ExpressionStatement es) {
            // GROOVY-3543: visit the declaration expressions so that declaration variables get added on the varStack
            Expression exp = es.getExpression();
            if (exp instanceof DeclarationExpression) {
                exp.visit(this);
            }
            super.visitExpressionStatement(es);
        }

        @Override
        public Expression transform(Expression exp) {
            if (exp instanceof VariableExpression) {
                VariableExpression ve = (VariableExpression) exp;
                if (ve.getName().equals("this"))
                    return thisExpression;
                else {
                    if (!varStack.getLast().contains(ve.getName())) {
                        return new PropertyExpression(thisExpression, ve.getName());
                    }
                }
            } else if (exp instanceof PropertyExpression) {
                PropertyExpression pe = (PropertyExpression) exp;
                if (pe.getObjectExpression() instanceof VariableExpression) {
                    VariableExpression vex = (VariableExpression) pe.getObjectExpression();
                    if (vex.isThisExpression()) {
                        pe.setObjectExpression(thisExpression);
                        return pe;
                    }
                }
            } else if (exp instanceof ClosureExpression) {
                ClosureExpression ce = (ClosureExpression) exp;
                ce.getVariableScope().putReferencedLocalVariable((Parameter) parameter.get());
                Parameter[] params = ce.getParameters();
                if (params == null) {
                    params = Parameter.EMPTY_ARRAY;
                } else if (params.length == 0) {
                    params = new Parameter[] { new Parameter(ClassHelper.OBJECT_TYPE, "it") };
                }
                addVariablesToStack(params);
                ce.getCode().visit(this);
                varStack.removeLast();
            }
            return super.transform(exp);
        }
    };
    for (MethodNode method : parent.getMethods()) {
        if (!method.isStatic()) {
            method.setModifiers(method.getModifiers() | Opcodes.ACC_STATIC);
            final Parameter[] origParams = method.getParameters();
            final Parameter[] newParams = new Parameter[origParams.length + 1];
            Parameter p = new Parameter(targetClass, "$this");
            p.setClosureSharedVariable(true);
            newParams[0] = p;
            parameter.set(p);
            System.arraycopy(origParams, 0, newParams, 1, origParams.length);
            method.setParameters(newParams);
            expressionTransformer.visitMethod(method);
        }
    }
    new VariableScopeVisitor(source, true).visitClass(parent);
}