Examples of org.springframework.expression.spel.ExpressionState

Package org.springframework.expression.spel

Examples of org.springframework.expression.spel.ExpressionState

org.springframework.expression.spel.ExpressionState
An ExpressionState is for maintaining per-expression-evaluation state, any changes to it are not seen by other expressions but it gives a place to hold local variables and for component expressions in a compound expression to communicate state. This is in contrast to the EvaluationContext, which is shared amongst expression evaluations, and any changes to it will be seen by other expressions or any code that chooses to ask questions of the context.
It also acts as a place for to define common utility routines that the various Ast nodes might need. @author Andy Clement @since 3.0

    return getValueType(getEvaluationContext(), rootObject);
  }


  public Class<?> getValueType(EvaluationContext context) throws EvaluationException {
    Assert.notNull(context, "The EvaluationContext is required");
    ExpressionState eState = new ExpressionState(context, configuration);
    TypeDescriptor typeDescriptor = ast.getValueInternal(eState).getTypeDescriptor();
    return typeDescriptor != null ? typeDescriptor.getType() : null;
  }

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    TypeDescriptor typeDescriptor = ast.getValueInternal(eState).getTypeDescriptor();
    return typeDescriptor != null ? typeDescriptor.getType() : null;
  }


  public Class<?> getValueType(EvaluationContext context, Object rootObject) throws EvaluationException {
    ExpressionState eState = new ExpressionState(context, toTypedValue(rootObject), configuration);
    TypeDescriptor typeDescriptor = ast.getValueInternal(eState).getTypeDescriptor();
    return typeDescriptor != null ? typeDescriptor.getType() : null;
  }

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  public TypeDescriptor getValueTypeDescriptor() throws EvaluationException {
    return getValueTypeDescriptor(getEvaluationContext());
  }
  
  public TypeDescriptor getValueTypeDescriptor(Object rootObject) throws EvaluationException {
    ExpressionState eState = new ExpressionState(getEvaluationContext(), toTypedValue(rootObject), configuration);
    return ast.getValueInternal(eState).getTypeDescriptor();
  }

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    return ast.getValueInternal(eState).getTypeDescriptor();
  }
  
  public TypeDescriptor getValueTypeDescriptor(EvaluationContext context) throws EvaluationException {
    Assert.notNull(context, "The EvaluationContext is required");
    ExpressionState eState = new ExpressionState(context, configuration);
    return ast.getValueInternal(eState).getTypeDescriptor();
  }

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    return ast.getValueInternal(eState).getTypeDescriptor();
  }
  
  public TypeDescriptor getValueTypeDescriptor(EvaluationContext context, Object rootObject) throws EvaluationException {
    Assert.notNull(context, "The EvaluationContext is required");
    ExpressionState eState = new ExpressionState(context, toTypedValue(rootObject), configuration);
    return ast.getValueInternal(eState).getTypeDescriptor();
  }

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    return expression;
  }


  public boolean isWritable(EvaluationContext context) throws EvaluationException {
    Assert.notNull(context, "The EvaluationContext is required");    
    return ast.isWritable(new ExpressionState(context, configuration));
  }

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    Assert.notNull(context, "The EvaluationContext is required");    
    return ast.isWritable(new ExpressionState(context, configuration));
  }


  public boolean isWritable(Object rootObject) throws EvaluationException {
    return ast.isWritable(new ExpressionState(getEvaluationContext(), toTypedValue(rootObject), configuration));
  }

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    return ast.isWritable(new ExpressionState(getEvaluationContext(), toTypedValue(rootObject), configuration));
  }
  
  public boolean isWritable(EvaluationContext context, Object rootObject) throws EvaluationException {
    Assert.notNull(context, "The EvaluationContext is required");    
    return ast.isWritable(new ExpressionState(context, toTypedValue(rootObject), configuration));
  }

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    return ast.isWritable(new ExpressionState(context, toTypedValue(rootObject), configuration));
  }


  public void setValue(EvaluationContext context, Object value) throws EvaluationException {
    Assert.notNull(context, "The EvaluationContext is required");    
    ast.setValue(new ExpressionState(context, configuration), value);
  }

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    Assert.notNull(context, "The EvaluationContext is required");    
    ast.setValue(new ExpressionState(context, configuration), value);
  }


  public void setValue(Object rootObject, Object value) throws EvaluationException {
    ast.setValue(new ExpressionState(getEvaluationContext(), toTypedValue(rootObject), configuration), value);
  }

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