Examples of com.google.gwt.dev.jjs.ast.JForStatement

com.google.gwt.dev.jjs.ast.JForStatement
Java for statement.

        SourceInfo info = makeSourceInfo(x);
        JStatement action = pop(x.action);
        List<JExpressionStatement> increments = pop(x.increments);
        JExpression condition = pop(x.condition);
        List<JStatement> initializations = pop(x.initializations);
        push(new JForStatement(info, initializations, condition, increments, action));
      } catch (Throwable e) {
        throw translateException(x, e);
      }
    }

View Full Code Here

      String elementVarName = elementVar.getName();


      JDeclarationStatement elementDecl = (JDeclarationStatement) processStatement(x.elementVariable);
      assert (elementDecl.initializer == null);


      JForStatement result;
      if (x.collectionVariable != null) {
        /**
         * <pre>
         * for (final T[] i$array = collection,
         *          int i$index = 0,
         *          final int i$max = i$array.length;
         *      i$index < i$max; ++i$index) {
         *   T elementVar = i$array[i$index];
         *   // user action
         * }
         * </pre>
         */
        JLocal arrayVar = JProgram.createLocal(info, elementVarName + "$array",
            ((JType) typeMap.get(x.collection.resolvedType)), true,
            currentMethodBody);
        JLocal indexVar = JProgram.createLocal(info, elementVarName + "$index",
            program.getTypePrimitiveInt(), false, currentMethodBody);
        JLocal maxVar = JProgram.createLocal(info, elementVarName + "$max",
            program.getTypePrimitiveInt(), true, currentMethodBody);


        List<JStatement> initializers = new ArrayList<JStatement>(3);
        // T[] i$array = arr
        initializers.add(createDeclaration(info, arrayVar,
            dispProcessExpression(x.collection)));
        // int i$index = 0
        initializers.add(createDeclaration(info, indexVar,
            program.getLiteralInt(0)));
        // int i$max = i$array.length
        initializers.add(createDeclaration(info, maxVar, new JArrayLength(info,
            new JLocalRef(info, arrayVar))));


        // i$index < i$max
        JExpression condition = new JBinaryOperation(info,
            program.getTypePrimitiveBoolean(), JBinaryOperator.LT,
            createVariableRef(info, indexVar), createVariableRef(info, maxVar));


        // ++i$index
        List<JExpressionStatement> increments = new ArrayList<JExpressionStatement>(
            1);
        increments.add(new JPrefixOperation(info, JUnaryOperator.INC,
            createVariableRef(info, indexVar)).makeStatement());


        // T elementVar = i$array[i$index];
        elementDecl.initializer = new JArrayRef(info, createVariableRef(info,
            arrayVar), createVariableRef(info, indexVar));
        body.addStmt(0, elementDecl);


        result = new JForStatement(info, initializers, condition, increments,
            body);
      } else {
        /**
         * <pre>
         * for (Iterator<T> i$iterator = collection.iterator(); i$iterator.hasNext();) {
         *   T elementVar = i$iterator.next();
         *   // user action
         * }
         * </pre>
         */
        JLocal iteratorVar = JProgram.createLocal(info,
            (elementVarName + "$iterator"), program.getIndexedType("Iterator"),
            false, currentMethodBody);


        List<JStatement> initializers = new ArrayList<JStatement>(1);
        // Iterator<T> i$iterator = collection.iterator()
        initializers.add(createDeclaration(
            info,
            iteratorVar,
            new JMethodCall(info, dispProcessExpression(x.collection),
                program.getIndexedMethod("Iterable.iterator"))));


        // i$iterator.hasNext()
        JExpression condition = new JMethodCall(info, createVariableRef(info,
            iteratorVar), program.getIndexedMethod("Iterator.hasNext"));


        // T elementVar = (T) i$iterator.next();
        elementDecl.initializer = new JMethodCall(info, createVariableRef(info,
            iteratorVar), program.getIndexedMethod("Iterator.next"));


        // Perform any implicit reference type casts (due to generics).
        // Note this occurs before potential unboxing.
        if (elementVar.getType() != program.getTypeJavaLangObject()) {
          TypeBinding collectionType;
          try {
            // TODO: This is slow! Cache lookup.
            Field privateField = ForeachStatement.class.getDeclaredField("collectionElementType");
            privateField.setAccessible(true);
            collectionType = (TypeBinding) privateField.get(x);
          } catch (Exception e) {
            throw new InternalCompilerException(elementDecl,
                "Failed to retreive collectionElementType through reflection",
                e);
          }
          JType toType = (JType) typeMap.get(collectionType);
          assert (toType instanceof JReferenceType);
          elementDecl.initializer = maybeCast(toType, elementDecl.initializer);
        }


        body.addStmt(0, elementDecl);


        result = new JForStatement(info, initializers, condition,
            Collections.<JExpressionStatement> emptyList(), body);
      }


      // May need to box or unbox the element assignment.
      if (x.elementVariableImplicitWidening != -1) {

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      List<JStatement> init = processStatements(x.initializations);
      JExpression expr = dispProcessExpression(x.condition);
      List<JExpressionStatement> incr = processExpressionStatements(x.increments);
      JStatement body = removeBody ? null : dispProcessStatement(x.action);
      return new JForStatement(info, init, expr, incr, body);
    }

View Full Code Here

        assert (elementDecl.initializer == null);


        JLocal elementVar = (JLocal) curMethod.locals.get(x.elementVariable.binding);
        String elementVarName = elementVar.getName();


        JForStatement result;
        if (x.collectionVariable != null) {
          /**
           * <pre>
         * for (final T[] i$array = collection,
         *          int i$index = 0,
         *          final int i$max = i$array.length;
         *      i$index < i$max; ++i$index) {
         *   T elementVar = i$array[i$index];
         *   // user action
         * }
         * </pre>
           */
          JLocal arrayVar =
              JProgram.createLocal(info, elementVarName + "$array", collection.getType(), true,
                  curMethod.body);
          JLocal indexVar =
              JProgram.createLocal(info, elementVarName + "$index", JPrimitiveType.INT, false,
                  curMethod.body);
          JLocal maxVar =
              JProgram.createLocal(info, elementVarName + "$max", JPrimitiveType.INT, true,
                  curMethod.body);


          List<JStatement> initializers = Lists.newArrayListWithCapacity(3);
          // T[] i$array = arr
          initializers.add(makeDeclaration(info, arrayVar, collection));
          // int i$index = 0
          initializers.add(makeDeclaration(info, indexVar, JIntLiteral.get(0)));
          // int i$max = i$array.length
          initializers.add(makeDeclaration(info, maxVar, new JArrayLength(info, new JLocalRef(info,
              arrayVar))));


          // i$index < i$max
          JExpression condition =
              new JBinaryOperation(info, JPrimitiveType.BOOLEAN, JBinaryOperator.LT, new JLocalRef(
                  info, indexVar), new JLocalRef(info, maxVar));


          // ++i$index
          JExpression increments = new JPrefixOperation(info, JUnaryOperator.INC,
              new JLocalRef(info, indexVar));


          // T elementVar = i$array[i$index];
          elementDecl.initializer =
              new JArrayRef(info, new JLocalRef(info, arrayVar), new JLocalRef(info, indexVar));
          body.addStmt(0, elementDecl);


          result = new JForStatement(info, initializers, condition, increments, body);
        } else {
          /**
           * <pre>
           * for (Iterator&lt;T&gt; i$iterator = collection.iterator(); i$iterator.hasNext();) {
           *   T elementVar = i$iterator.next();
           *   // user action
           * }
           * </pre>
           */
          CompilationUnitScope cudScope = scope.compilationUnitScope();
          ReferenceBinding javaUtilIterator = scope.getJavaUtilIterator();
          ReferenceBinding javaLangIterable = scope.getJavaLangIterable();
          MethodBinding iterator = javaLangIterable.getExactMethod(ITERATOR, NO_TYPES, cudScope);
          MethodBinding hasNext = javaUtilIterator.getExactMethod(HAS_NEXT, NO_TYPES, cudScope);
          MethodBinding next = javaUtilIterator.getExactMethod(NEXT, NO_TYPES, cudScope);
          JLocal iteratorVar =
              JProgram.createLocal(info, (elementVarName + "$iterator"), typeMap
                  .get(javaUtilIterator), false, curMethod.body);


          List<JStatement> initializers = Lists.newArrayListWithCapacity(1);
          // Iterator<T> i$iterator = collection.iterator()
          initializers.add(makeDeclaration(info, iteratorVar, new JMethodCall(info, collection,
              typeMap.get(iterator))));


          // i$iterator.hasNext()
          JExpression condition =
              new JMethodCall(info, new JLocalRef(info, iteratorVar), typeMap.get(hasNext));


          // T elementVar = (T) i$iterator.next();
          elementDecl.initializer =
              new JMethodCall(info, new JLocalRef(info, iteratorVar), typeMap.get(next));


          // Perform any implicit reference type casts (due to generics).
          // Note this occurs before potential unboxing.
          if (elementVar.getType() != javaLangObject) {
            TypeBinding collectionElementType = (TypeBinding) collectionElementTypeField.get(x);
            JType toType = typeMap.get(collectionElementType);
            assert (toType instanceof JReferenceType);
            elementDecl.initializer = maybeCast(toType, elementDecl.initializer);
          }


          body.addStmt(0, elementDecl);


          result = new JForStatement(info, initializers, condition,
              null, body);
        }


        // May need to box or unbox the element assignment.
        elementDecl.initializer =

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        JExpression incrementsExpression =
            singleExpressionFromExpressionList(info, incrementsExpressions);


        JExpression condition = pop(x.condition);
        List<JStatement> initializations = pop(x.initializations);
        push(new JForStatement(info, initializations, condition, incrementsExpression, action));
      } catch (Throwable e) {
        throw translateException(x, e);
      }
    }

View Full Code Here


      List/* <? extends JStatement> */init = processStatements(x.initializations);
      JExpression expr = dispProcessExpression(x.condition);
      List/* <JExpressionStatement> */incr = processStatements(x.increments);
      JStatement body = removeBody ? null : dispProcessStatement(x.action);
      return new JForStatement(program, info, init, expr, incr, body);
    }

View Full Code Here

      String elementVarName = elementVar.getName();


      JDeclarationStatement elementDecl = (JDeclarationStatement) processStatement(x.elementVariable);
      assert (elementDecl.initializer == null);


      JForStatement result;
      if (x.collection.resolvedType.isArrayType()) {
        /**
         * <pre>
         * for (T[] i$array = collection, int i$index = 0, int i$max = i$array.length;
         *     i$index < i$max; ++i$index) {
         *   T elementVar = i$array[i$index];
         *   // user action
         * }
         * </pre>
         */
        JLocal arrayVar = createSyntheticLocal(info, elementVarName + "$array",
            (JType) typeMap.get(x.collection.resolvedType));
        JLocal indexVar = createSyntheticLocal(info, elementVarName + "$index",
            program.getTypePrimitiveInt());
        JLocal maxVar = createSyntheticLocal(info, elementVarName + "$max",
            program.getTypePrimitiveInt());


        List<JStatement> initializers = new ArrayList<JStatement>(3);
        // T[] i$array = arr
        initializers.add(createDeclaration(info, arrayVar,
            dispProcessExpression(x.collection)));
        // int i$index = 0
        initializers.add(createDeclaration(info, indexVar,
            program.getLiteralInt(0)));
        // int i$max = i$array.length
        initializers.add(createDeclaration(info, maxVar, new JFieldRef(info,
            createVariableRef(info, arrayVar),
            program.getIndexedField("Array.length"), currentClass)));


        // i$index < i$max
        JExpression condition = new JBinaryOperation(info,
            program.getTypePrimitiveBoolean(), JBinaryOperator.LT,
            createVariableRef(info, indexVar), createVariableRef(info, maxVar));


        // ++i$index
        List<JExpressionStatement> increments = new ArrayList<JExpressionStatement>(
            1);
        increments.add(new JPrefixOperation(info, JUnaryOperator.INC,
            createVariableRef(info, indexVar)).makeStatement());


        // T elementVar = i$array[i$index];
        elementDecl.initializer = new JArrayRef(info, createVariableRef(info,
            arrayVar), createVariableRef(info, indexVar));
        body.addStmt(0, elementDecl);


        result = new JForStatement(info, initializers, condition, increments,
            body);
      } else {
        /**
         * <pre>
         * for (Iterator<T> i$iterator = collection.iterator(); i$iterator.hasNext(); ) {
         *   T elementVar = i$iterator.next();
         *   // user action
         * }
         * </pre>
         */
        JLocal iteratorVar = createSyntheticLocal(info, elementVarName
            + "$iterator", program.getIndexedType("Iterator"));


        List<JStatement> initializers = new ArrayList<JStatement>(1);
        // Iterator<T> i$iterator = collection.iterator()
        initializers.add(createDeclaration(info, iteratorVar, new JMethodCall(
            info, dispProcessExpression(x.collection),
            program.getIndexedMethod("Iterable.iterator"))));


        // i$iterator.hasNext()
        JExpression condition = new JMethodCall(info, createVariableRef(info,
            iteratorVar), program.getIndexedMethod("Iterator.hasNext"));


        // T elementVar = (T) i$iterator.next();
        elementDecl.initializer = new JMethodCall(info, createVariableRef(info,
            iteratorVar), program.getIndexedMethod("Iterator.next"));


        // Perform any implicit reference type casts (due to generics).
        // Note this occurs before potential unboxing.
        if (elementVar.getType() != program.getTypeJavaLangObject()) {
          TypeBinding collectionType;
          try {
            Field privateField = ForeachStatement.class.getDeclaredField("collectionElementType");
            privateField.setAccessible(true);
            collectionType = (TypeBinding) privateField.get(x);
          } catch (Exception e) {
            throw new InternalCompilerException(elementDecl,
                "Failed to retreive collectionElementType through reflection",
                e);
          }
          JType toType = (JType) typeMap.get(collectionType);
          assert (toType instanceof JReferenceType);
          elementDecl.initializer = maybeCast(toType, elementDecl.initializer);
        }


        body.addStmt(0, elementDecl);


        result = new JForStatement(info, initializers, condition,
            Collections.<JExpressionStatement> emptyList(), body);
      }


      // May need to box or unbox the element assignment.
      if (x.elementVariableImplicitWidening != -1) {

View Full Code Here


      List<JStatement> init = processStatements(x.initializations);
      JExpression expr = dispProcessExpression(x.condition);
      List<JExpressionStatement> incr = processExpressionStatements(x.increments);
      JStatement body = removeBody ? null : dispProcessStatement(x.action);
      return new JForStatement(info, init, expr, incr, body);
    }

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