Examples with Statement com.google.devtools.j2objc.ast.Statement used on opensource projects

Example 26 with Statement

use of com.google.devtools.j2objc.ast.Statement in project j2objc by google.

the class StatementGenerator method printStatements.

private void printStatements(List<?> statements) {
    for (Iterator<?> it = statements.iterator(); it.hasNext(); ) {
        Statement s = (Statement) it.next();
        s.accept(this);
    }
}

Example 27 with Statement

use of com.google.devtools.j2objc.ast.Statement in project j2objc by google.

the class AnnotationRewriter method addConstructor.

private void addConstructor(AnnotationTypeDeclaration node, Map<ExecutableElement, VariableElement> fieldElements) {
    TypeElement type = node.getTypeElement();
    String typeName = nameTable.getFullName(type);
    FunctionDeclaration constructorDecl = new FunctionDeclaration("create_" + typeName, type.asType());
    Block constructorBody = new Block();
    constructorDecl.setBody(constructorBody);
    List<Statement> stmts = constructorBody.getStatements();
    stmts.add(new NativeStatement(UnicodeUtils.format("%s *self = AUTORELEASE([[%s alloc] init]);", typeName, typeName)));
    for (ExecutableElement memberElement : ElementUtil.getSortedAnnotationMembers(type)) {
        TypeMirror memberType = memberElement.getReturnType();
        String propName = NameTable.getAnnotationPropertyName(memberElement);
        String fieldName = nameTable.getVariableShortName(fieldElements.get(memberElement));
        VariableElement param = GeneratedVariableElement.newParameter(propName, memberType, null);
        constructorDecl.addParameter(new SingleVariableDeclaration(param));
        String paramName = nameTable.getVariableShortName(param);
        String rhs = TypeUtil.isReferenceType(memberType) ? "RETAIN_(" + paramName + ")" : paramName;
        stmts.add(new NativeStatement("self->" + fieldName + " = " + rhs + ";"));
    }
    stmts.add(new NativeStatement("return self;"));
    node.addBodyDeclaration(constructorDecl);
}

Example 28 with Statement

use of com.google.devtools.j2objc.ast.Statement in project j2objc by google.

the class Rewriter method visit.

@Override
public boolean visit(TryStatement node) {
    // This visit rewrites try-with-resources constructs into regular try statements according to
    // JLS 14.20.3. The rewriting is done in a visit instead of endVisit because the mutations may
    // result in more try-with-resources constructs that need to be rewritten recursively.
    List<TreeNode> resources = node.getResources();
    if (resources.isEmpty()) {
        return true;
    }
    if (!node.getCatchClauses().isEmpty() || node.getFinally() != null) {
        // Extended try-with-resources. (JLS 14.20.3.2)
        // The new innerTry statement will be a "Basic try-with-resources" and will be rewritten by
        // the code below when it is visited.
        TryStatement innerTry = new TryStatement().setBody(TreeUtil.remove(node.getBody()));
        ;
        TreeUtil.moveList(resources, innerTry.getResources());
        node.setBody(new Block().addStatement(innerTry));
        return true;
    }
    // Basic try-with-resources. (JLS 14.20.3.1)
    DeclaredType throwableType = (DeclaredType) typeUtil.getJavaThrowable().asType();
    VariableElement primaryException = GeneratedVariableElement.newLocalVar("__primaryException" + resources.size(), throwableType, null);
    TreeNode resource = resources.remove(0);
    VariableElement resourceVar = null;
    VariableDeclarationFragment resourceFrag = null;
    if (resource.getKind() == Kind.VARIABLE_DECLARATION_EXPRESSION) {
        List<VariableDeclarationFragment> resourceFrags = ((VariableDeclarationExpression) resource).getFragments();
        assert resourceFrags.size() == 1;
        resourceFrag = resourceFrags.get(0);
        resourceVar = resourceFrag.getVariableElement();
    } else {
        resourceVar = TreeUtil.getVariableElement((Expression) resource);
    }
    assert resourceVar != null;
    DeclaredType closeableType = typeUtil.findSupertype(resourceVar.asType(), "java.lang.AutoCloseable");
    ExecutablePair closeMethod = typeUtil.findMethod(closeableType, "close");
    ExecutablePair addSuppressedMethod = typeUtil.findMethod(throwableType, "addSuppressed", "java.lang.Throwable");
    Block block = new Block();
    if (resourceFrag != null) {
        block.addStatement(new VariableDeclarationStatement(resourceVar, TreeUtil.remove(resourceFrag.getInitializer())));
    }
    block.addStatement(new VariableDeclarationStatement(primaryException, new NullLiteral(typeUtil.getNull())));
    // If the current try node is the only statement in its parent block then replace the parent
    // block instead of the try node to avoid extra nesting of braces.
    TreeNode parent = node.getParent();
    if (parent instanceof Block && ((Block) parent).getStatements().size() == 1) {
        parent.replaceWith(block);
    } else {
        node.replaceWith(block);
    }
    block.addStatement(TreeUtil.remove(node));
    VariableElement caughtException = GeneratedVariableElement.newLocalVar("e", throwableType, null);
    Block catchBlock = new Block().addStatement(new ExpressionStatement(new Assignment(new SimpleName(primaryException), new SimpleName(caughtException)))).addStatement(new ThrowStatement(new SimpleName(caughtException)));
    node.addCatchClause(new CatchClause().setException(new SingleVariableDeclaration(caughtException)).setBody(catchBlock));
    Statement closeResource = new ExpressionStatement(new MethodInvocation(closeMethod, typeUtil.getVoid(), new SimpleName(resourceVar)));
    VariableElement suppressedException = GeneratedVariableElement.newLocalVar("e", throwableType, null);
    node.setFinally(new Block().addStatement(new IfStatement().setExpression(new InfixExpression(typeUtil.getBoolean(), InfixExpression.Operator.NOT_EQUALS, new SimpleName(resourceVar), new NullLiteral(typeUtil.getNull()))).setThenStatement(new Block().addStatement(new IfStatement().setExpression(new InfixExpression(typeUtil.getBoolean(), InfixExpression.Operator.NOT_EQUALS, new SimpleName(primaryException), new NullLiteral(typeUtil.getNull()))).setThenStatement(new Block().addStatement(new TryStatement().setBody(new Block().addStatement(closeResource)).addCatchClause(new CatchClause().setException(new SingleVariableDeclaration(suppressedException)).setBody(new Block().addStatement(new ExpressionStatement(new MethodInvocation(addSuppressedMethod, typeUtil.getVoid(), new SimpleName(primaryException)).addArgument(new SimpleName(suppressedException)))))))).setElseStatement(new Block().addStatement(closeResource.copy()))))));
    // Visit the new block instead of the current node because some of content of the node (eg. the
    // resource initializer) has been moved outside of the try node.
    block.accept(this);
    return false;
}

Example 29 with Statement

use of com.google.devtools.j2objc.ast.Statement in project j2objc by google.

the class Functionizer method setFunctionCaller.

/**
 *  Replace method block statements with single statement that invokes function.
 */
private void setFunctionCaller(MethodDeclaration method, ExecutableElement methodElement) {
    TypeMirror returnType = methodElement.getReturnType();
    TypeElement declaringClass = ElementUtil.getDeclaringClass(methodElement);
    Block body = new Block();
    method.setBody(body);
    method.removeModifiers(Modifier.NATIVE);
    List<Statement> stmts = body.getStatements();
    FunctionInvocation invocation = new FunctionInvocation(newFunctionElement(methodElement), returnType);
    List<Expression> args = invocation.getArguments();
    if (!ElementUtil.isStatic(methodElement)) {
        args.add(new ThisExpression(declaringClass.asType()));
    }
    for (SingleVariableDeclaration param : method.getParameters()) {
        args.add(new SimpleName(param.getVariableElement()));
    }
    if (TypeUtil.isVoid(returnType)) {
        stmts.add(new ExpressionStatement(invocation));
        if (ElementUtil.isConstructor(methodElement)) {
            stmts.add(new ReturnStatement(new ThisExpression(declaringClass.asType())));
        }
    } else {
        stmts.add(new ReturnStatement(invocation));
    }
}

Example 30 with Statement

use of com.google.devtools.j2objc.ast.Statement in project j2objc by google.

the class InitializationNormalizer method isDesignatedConstructor.

/**
 * Returns true if this is a constructor that doesn't call "this(...)".  This constructors are
 * skipped so initializers aren't run more than once per instance creation.
 */
public static boolean isDesignatedConstructor(MethodDeclaration node) {
    if (!node.isConstructor()) {
        return false;
    }
    Block body = node.getBody();
    if (body == null) {
        return false;
    }
    List<Statement> stmts = body.getStatements();
    return (stmts.isEmpty() || !(stmts.get(0) instanceof ConstructorInvocation));
}