Examples of org.springframework.binding.expression.ExpressionParser.parseExpression()

Package org.springframework.binding.expression

Class org.springframework.binding.expression.ExpressionParser

Examples of org.springframework.binding.expression.ExpressionParser.parseExpression()

org.springframework.binding.expression.ExpressionParser.parseExpression()
Parse the expression string and return a compiled Expression object you can use for evaluation. Some examples:
```
 3 + 4 name.firstName 
```
@param expressionString the raw expression string to parse @param context a context for influencing this expression parsing routine (optional) @return an evaluator for the parsed expression @throws ParserException an exception occurred during parsing

  }


  public void testStartWithMapper() {
    DefaultMapper attributeMapper = new DefaultMapper();
    ExpressionParser parser = DefaultExpressionParserFactory.getExpressionParser();
    Expression x = parser.parseExpression("attr", new FluentParserContext().evaluate(AttributeMap.class));
    Expression y = parser.parseExpression("flowScope.attr", new FluentParserContext()
        .evaluate(RequestContext.class));
    attributeMapper.addMapping(new DefaultMapping(x, y));
    flow.setInputMapper(attributeMapper);
    MockRequestControlContext context = new MockRequestControlContext(flow);

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  public void testStartWithMapper() {
    DefaultMapper attributeMapper = new DefaultMapper();
    ExpressionParser parser = DefaultExpressionParserFactory.getExpressionParser();
    Expression x = parser.parseExpression("attr", new FluentParserContext().evaluate(AttributeMap.class));
    Expression y = parser.parseExpression("flowScope.attr", new FluentParserContext()
        .evaluate(RequestContext.class));
    attributeMapper.addMapping(new DefaultMapping(x, y));
    flow.setInputMapper(attributeMapper);
    MockRequestControlContext context = new MockRequestControlContext(flow);
    LocalAttributeMap sessionInput = new LocalAttributeMap();

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  }


  public void testStartWithMapperButNoInput() {
    DefaultMapper attributeMapper = new DefaultMapper();
    ExpressionParser parser = DefaultExpressionParserFactory.getExpressionParser();
    Expression x = parser.parseExpression("attr", new FluentParserContext().evaluate(AttributeMap.class));
    Expression y = parser.parseExpression("flowScope.attr", new FluentParserContext()
        .evaluate(RequestContext.class));
    attributeMapper.addMapping(new DefaultMapping(x, y));
    flow.setInputMapper(attributeMapper);
    MockRequestControlContext context = new MockRequestControlContext(flow);

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  public void testStartWithMapperButNoInput() {
    DefaultMapper attributeMapper = new DefaultMapper();
    ExpressionParser parser = DefaultExpressionParserFactory.getExpressionParser();
    Expression x = parser.parseExpression("attr", new FluentParserContext().evaluate(AttributeMap.class));
    Expression y = parser.parseExpression("flowScope.attr", new FluentParserContext()
        .evaluate(RequestContext.class));
    attributeMapper.addMapping(new DefaultMapping(x, y));
    flow.setInputMapper(attributeMapper);
    MockRequestControlContext context = new MockRequestControlContext(flow);
    LocalAttributeMap sessionInput = new LocalAttributeMap();

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  }


  public void testEndWithOutputMapper() {
    DefaultMapper attributeMapper = new DefaultMapper();
    ExpressionParser parser = DefaultExpressionParserFactory.getExpressionParser();
    Expression x = parser.parseExpression("flowScope.attr", new FluentParserContext()
        .evaluate(RequestContext.class));
    Expression y = parser.parseExpression("attr", new FluentParserContext().evaluate(MutableAttributeMap.class));
    attributeMapper.addMapping(new DefaultMapping(x, y));
    flow.setOutputMapper(attributeMapper);
    MockRequestControlContext context = new MockRequestControlContext(flow);

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  public void testEndWithOutputMapper() {
    DefaultMapper attributeMapper = new DefaultMapper();
    ExpressionParser parser = DefaultExpressionParserFactory.getExpressionParser();
    Expression x = parser.parseExpression("flowScope.attr", new FluentParserContext()
        .evaluate(RequestContext.class));
    Expression y = parser.parseExpression("attr", new FluentParserContext().evaluate(MutableAttributeMap.class));
    attributeMapper.addMapping(new DefaultMapping(x, y));
    flow.setOutputMapper(attributeMapper);
    MockRequestControlContext context = new MockRequestControlContext(flow);
    context.getFlowScope().put("attr", "foo");
    LocalAttributeMap sessionOutput = new LocalAttributeMap();

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      }
    };
    EndState state = new EndState(flow, "end");
    DefaultMapper mapper = new DefaultMapper();
    ExpressionParser parser = DefaultExpressionParserFactory.getExpressionParser();
    Expression x = parser.parseExpression("flowScope.x", new FluentParserContext().evaluate(RequestContext.class));
    Expression y = parser.parseExpression("y", new FluentParserContext().evaluate(MutableAttributeMap.class));
    mapper.addMapping(new DefaultMapping(x, y));
    state.setOutputMapper(mapper);
    MockRequestControlContext context = new MockRequestControlContext(flow);
    context.getFlowScope().put("x", "foo");

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    };
    EndState state = new EndState(flow, "end");
    DefaultMapper mapper = new DefaultMapper();
    ExpressionParser parser = DefaultExpressionParserFactory.getExpressionParser();
    Expression x = parser.parseExpression("flowScope.x", new FluentParserContext().evaluate(RequestContext.class));
    Expression y = parser.parseExpression("y", new FluentParserContext().evaluate(MutableAttributeMap.class));
    mapper.addMapping(new DefaultMapping(x, y));
    state.setOutputMapper(mapper);
    MockRequestControlContext context = new MockRequestControlContext(flow);
    context.getFlowScope().put("x", "foo");
    state.enter(context);

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    String targetStateId = (String) source;
    if (!StringUtils.hasText(targetStateId)) {
      return null;
    }
    ExpressionParser parser = flowBuilderContext.getExpressionParser();
    Expression expression = parser.parseExpression(targetStateId, new FluentParserContext().template().evaluate(
        RequestContext.class).expectResult(String.class));
    return new DefaultTargetStateResolver(expression);


  }
}

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    if (StringUtils.hasText(input.getValue())) {
      value = input.getValue();
    } else {
      value = "flowScope." + name;
    }
    Expression source = parser.parseExpression(name, new FluentParserContext().evaluate(MutableAttributeMap.class));
    Expression target = parser.parseExpression(value, new FluentParserContext().evaluate(RequestContext.class));
    DefaultMapping mapping = new DefaultMapping(source, target);
    parseAndSetMappingConversionExecutor(input, mapping);
    parseAndSetMappingRequired(input, mapping);
    return mapping;

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