Examples of org.springframework.data.mongodb.core.spel.ExpressionNode

Package org.springframework.data.mongodb.core.spel

Examples of org.springframework.data.mongodb.core.spel.ExpressionNode

org.springframework.data.mongodb.core.spel.ExpressionNode
A value object for nodes in an expression. Allows iterating ove potentially available child {@link ExpressionNode}s. @author Oliver Gierke

    Assert.notNull(context, "AggregationOperationContext must not be null!");
    Assert.notNull(params, "Parameters must not be null!");


    SpelExpression spelExpression = (SpelExpression) PARSER.parseExpression(expression);
    ExpressionState state = new ExpressionState(new StandardEvaluationContext(params), CONFIG);
    ExpressionNode node = ExpressionNode.from(spelExpression.getAST(), state);


    return transform(new AggregationExpressionTransformationContext<ExpressionNode>(node, null, null, context));
  }

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     * @see org.springframework.data.mongodb.core.aggregation.SpelExpressionTransformer.SpelNodeWrapper#convertSpelNodeToMongoObjectExpression(org.springframework.data.mongodb.core.aggregation.SpelExpressionTransformer.ExpressionConversionContext)
     */
    @Override
    protected Object convert(AggregationExpressionTransformationContext<ExpressionNode> context) {


      ExpressionNode currentNode = context.getCurrentNode();


      if (!currentNode.hasChildren()) {
        return null;
      }


      // just take the first item
      return transform(currentNode.getChild(0), currentNode, null, context);
    }

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     * @see org.springframework.data.mongodb.core.aggregation.SpelExpressionTransformer.SpelNodeWrapper#convertSpelNodeToMongoObjectExpression(org.springframework.data.mongodb.core.aggregation.SpelExpressionTransformer.ExpressionConversionContext)
     */
    @Override
    protected Object convert(AggregationExpressionTransformationContext<ExpressionNode> context) {


      ExpressionNode currentNode = context.getCurrentNode();


      if (currentNode.hasfirstChildNotOfType(Indexer.class)) {
        // we have a property path expression like: foo.bar -> render as reference
        return context.addToPreviousOrReturn(context.getFieldReference().toString());
      }


      return context.addToPreviousOrReturn(currentNode.getValue());
    }

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Related Classes of org.springframework.data.mongodb.core.spel.ExpressionNode

org.springframework.data.mongodb.core.aggregation.SpelExpressionTransformer

org.springframework.data.mongodb.core.aggregation.SpelExpressionTransformer$CompoundExpressionNodeConversion

org.springframework.data.mongodb.core.aggregation.SpelExpressionTransformer$InlineListNodeConversion

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