Examples of JavaExpr

com.google.template.soy.javasrc.restricted.JavaExpr
Value class to represent a Java expression. Includes the text of the expression as well as the precedence of the top-most operator.
Important: This class may only be used in implementing plugins (e.g. functions, directives).
Note that even though the precedence numbers we use are for Soy, the precedence ordering of the Soy expression operators matches that of Java (as well as Java), so the precedence numbers are correct when used for generating Java code as well. @author Kai Huang
jsky.util.JavaExpr
This class is a simple wrapper for the JEL package and provides support for evaluating dynamic, numerical expressions in Java. @author Allan Brighton

Examples of com.google.template.soy.javasrc.restricted.JavaExpr

      refText = genGetDataSingleCallWithKey("this.$$ijData", firstKey);
      if (node.isNullSafeIjDataRef()) {
        nullSafetyPrefix = "(this.$$ijData == null) ? " + NULL_DATA_INSTANCE + " : ";
      }
    } else {
      JavaExpr translation = getLocalVarTranslation(firstKey);
      if (translation != null) {
        // Case 2: In-scope local var.
        refText = (translation.getPrecedence() == Integer.MAX_VALUE) ?
            translation.getText() : "(" + translation.getText() + ")";
      } else {
        // Case 3: Data reference.
        refText = genGetDataSingleCallWithKey("data", firstKey);
      }
    }


    // ------ Translate the rest of the keys, if any. ------
    for (ExprNode child : node.getChildren()) {
      DataRefAccessNode accessNode = (DataRefAccessNode) child;


      if (accessNode.isNullSafe()) {
        nullSafetyPrefix +=
            "(! " + genFunctionCall(UTILS_LIB + ".$$isNonnull", refText) + ") ? " +
            NULL_DATA_INSTANCE + " : ";
      }


      switch (accessNode.getKind()) {
        case DATA_REF_ACCESS_KEY_NODE:
          refText = genGetDataSingleCallWithKey(
              refText, ((DataRefAccessKeyNode) accessNode).getKey());
          break;
        case DATA_REF_ACCESS_INDEX_NODE:
          refText = genGetDataSingleCallWithKey(
              refText,
              Integer.toString(((DataRefAccessIndexNode) accessNode).getIndex()));
          break;
        case DATA_REF_ACCESS_EXPR_NODE:
          JavaExpr keyExpr = visit(accessNode.getChild(0));
          refText = genGetDataSingleCallWithKeyExpr(refText, keyExpr);
          break;
        default:
          throw new AssertionError();
      }
    }


    if (nullSafetyPrefix.length() == 0) {
      return new JavaExpr(refText, SoyData.class, Integer.MAX_VALUE);
    } else {
      return new JavaExpr(
          nullSafetyPrefix + refText, SoyData.class, Operator.CONDITIONAL.getPrecedence());
    }
  }

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Examples of com.google.template.soy.javasrc.restricted.JavaExpr

  // Implementations for operators.




  @Override protected JavaExpr visitNegativeOpNode(NegativeOpNode node) {


    JavaExpr operand = visit(node.getChild(0));


    String integerComputation = genNewIntegerData(genUnaryOp("-", genIntegerValue(operand)));
    String floatComputation = genNewFloatData(genUnaryOp("-", genFloatValue(operand)));


    if (isAlwaysInteger(operand)) {

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Examples of com.google.template.soy.javasrc.restricted.JavaExpr

  }




  @Override protected JavaExpr visitNotOpNode(NotOpNode node) {


    JavaExpr operand = visit(node.getChild(0));
    return convertBooleanResult(genNewBooleanData(genUnaryOp("!", genCoerceBoolean(operand))));
  }

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Examples of com.google.template.soy.javasrc.restricted.JavaExpr

  }




  @Override protected JavaExpr visitDivideByOpNode(DivideByOpNode node) {


    JavaExpr operand0 = visit(node.getChild(0));
    JavaExpr operand1 = visit(node.getChild(1));


    // Note: Soy always performs floating-point division, even on two integers (like JavaScript).
    return convertFloatResult(genNewFloatData(genBinaryOp(
        "/", genNumberValue(operand0), genNumberValue(operand1))));
  }

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Examples of com.google.template.soy.javasrc.restricted.JavaExpr

  }




  @Override protected JavaExpr visitModOpNode(ModOpNode node) {


    JavaExpr operand0 = visit(node.getChild(0));
    JavaExpr operand1 = visit(node.getChild(1));


    return convertIntegerResult(genNewIntegerData(genBinaryOp(
        "%", genIntegerValue(operand0), genIntegerValue(operand1))));
  }

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Examples of com.google.template.soy.javasrc.restricted.JavaExpr

  }




  @Override protected JavaExpr visitPlusOpNode(PlusOpNode node) {


    JavaExpr operand0 = visit(node.getChild(0));
    JavaExpr operand1 = visit(node.getChild(1));


    String stringComputation = genNewStringData(genBinaryOp(
        "+", genCoerceString(operand0), genCoerceString(operand1)));
    String integerComputation = genNewIntegerData(genBinaryOp(
        "+", genIntegerValue(operand0), genIntegerValue(operand1)));
    String floatComputation = genNewFloatData(genBinaryOp(
        "+", genNumberValue(operand0), genNumberValue(operand1)));


    if (isAlwaysTwoIntegers(operand0, operand1)) {
      return convertIntegerResult(integerComputation);
    } else if (isAlwaysAtLeastOneString(operand0, operand1)) {
      return convertStringResult(stringComputation);
    } else if (isAlwaysTwoFloatsOrOneFloatOneInteger(operand0, operand1)) {
      return convertFloatResult(floatComputation);
    } else {
      return convertUnknownResult(genFunctionCall(
          UTILS_LIB + ".$$plus", operand0.getText(), operand1.getText()));
    }
  }

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Examples of com.google.template.soy.javasrc.restricted.JavaExpr

  }




  @Override protected JavaExpr visitEqualOpNode(EqualOpNode node) {


    JavaExpr operand0 = visit(node.getChild(0));
    JavaExpr operand1 = visit(node.getChild(1));


    return convertBooleanResult(genNewBooleanData(
        genMaybeProtect(operand0, Integer.MAX_VALUE) + ".equals(" + operand1.getText() + ")"));
  }

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Examples of com.google.template.soy.javasrc.restricted.JavaExpr

  }




  @Override protected JavaExpr visitNotEqualOpNode(NotEqualOpNode node) {


    JavaExpr operand0 = visit(node.getChild(0));
    JavaExpr operand1 = visit(node.getChild(1));


    return convertBooleanResult(genNewBooleanData(
        "! " + genMaybeProtect(operand0, Integer.MAX_VALUE) + ".equals(" +
        operand1.getText() + ")"));
  }

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Examples of com.google.template.soy.javasrc.restricted.JavaExpr

  }




  @Override protected JavaExpr visitConditionalOpNode(ConditionalOpNode node) {


    JavaExpr operand0 = visit(node.getChild(0));
    JavaExpr operand1 = visit(node.getChild(1));
    JavaExpr operand2 = visit(node.getChild(2));


    Class<?> type1 = operand1.getType();
    Class<?> type2 = operand2.getType();
    // Set result type to nearest common ancestor of type1 and type2.
    Class<?> resultType = null;
    for (Class<?> type = type1; type != null; type = type.getSuperclass()) {
      if (type.isAssignableFrom(type2)) {
        resultType = type;
        break;
      }
    }
    if (resultType == null) {
      throw new AssertionError();
    }


    return new JavaExpr(
        genCoerceBoolean(operand0) + " ? " +
        genMaybeProtect(operand1, Operator.CONDITIONAL.getPrecedence() + 1) + " : " +
        genMaybeProtect(operand2, Operator.CONDITIONAL.getPrecedence() + 1),
        resultType, Operator.CONDITIONAL.getPrecedence());
  }

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Examples of com.google.template.soy.javasrc.restricted.JavaExpr

  // -----------------------------------------------------------------------------------------------
  // Private helpers.




  private JavaExpr convertBooleanResult(String exprText) {
    return new JavaExpr(exprText, BooleanData.class, Integer.MAX_VALUE);
  }

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