Package org.apache.qpid.jms.selector.filter

Class ConstantExpression

  • All Implemented Interfaces:
    Expression
    public class ConstantExpression
extends java.lang.Object
implements Expression
    Represents a constant expression

    • Field Summary

      Fields 
      Modifier and Type Field Description
      static org.apache.qpid.jms.selector.filter.ConstantExpression.BooleanConstantExpression FALSE  
      static org.apache.qpid.jms.selector.filter.ConstantExpression.BooleanConstantExpression NULL  
      static org.apache.qpid.jms.selector.filter.ConstantExpression.BooleanConstantExpression TRUE  

    • Constructor Summary

      Constructors 
      Constructor Description
      ConstantExpression​(java.lang.Object value)  

    • Field Detail

      • NULL

        public static final org.apache.qpid.jms.selector.filter.ConstantExpression.BooleanConstantExpression NULL

      • TRUE

        public static final org.apache.qpid.jms.selector.filter.ConstantExpression.BooleanConstantExpression TRUE

      • FALSE

        public static final org.apache.qpid.jms.selector.filter.ConstantExpression.BooleanConstantExpression FALSE

    • Constructor Detail

      • ConstantExpression

        public ConstantExpression​(java.lang.Object value)

    • Method Detail

      • createFromDecimal

        public static ConstantExpression createFromDecimal​(java.lang.String text)

      • createFromHex

        public static ConstantExpression createFromHex​(java.lang.String text)

      • createFromOctal

        public static ConstantExpression createFromOctal​(java.lang.String text)

      • evaluate

        public java.lang.Object evaluate​(Filterable message)
                          throws FilterException
        Specified by:
        evaluate in interface Expression
        Parameters:
        message - The message that is being selected against.
        Returns:
        the value of this expression
        Throws:
        FilterException - if an error occurs during evaluation.

      • getValue

        public java.lang.Object getValue()

      • toString

        public java.lang.String toString()
        Overrides:
        toString in class java.lang.Object
        See Also:
        Object.toString()

      • hashCode

        public int hashCode()
        TODO: more efficient hashCode()
        Overrides:
        hashCode in class java.lang.Object
        See Also:
        Object.hashCode()

      • equals

        public boolean equals​(java.lang.Object o)
        TODO: more efficient hashCode()
        Overrides:
        equals in class java.lang.Object
        See Also:
        Object.equals(java.lang.Object)

      • encodeString

        public static java.lang.String encodeString​(java.lang.String s)
        Encodes the value of string so that it looks like it would look like when it was provided in a selector.
        Parameters:
        s - the original string
        Returns:
        the encoded String