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## net.sf.dropboxmq.messageselector
Class Expression

    java.lang.Object
      net.sf.dropboxmq.messageselector.Expression

Direct Known Subclasses:
  BinaryExpression, ConstantExpression, IdentifierExpression, InExpression, UnaryExpression

    public abstract class Expression

extends Object

Created: 06 Oct 2007

Version:
  $Revision: 211 $, $Date: 2010-11-14 14:21:24 -0700 (Sun, 14 Nov 2010) $
Author:
  Dwayne Schultz

Constructor Summary
`Expression()`

Method Summary
`boolean` | `evaluate(Message message)`
`abstract Object` | `getValue(Message message)`
`abstract Class` | `getValueClass()`
`abstract String` | `toString(String prefix, String indent)`

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Constructor Detail

### Expression

    public Expression()

Method Detail

### getValue

    public abstract Object getValue(Message message)

### evaluate

    public boolean evaluate(Message message)

### getValueClass

    public abstract Class getValueClass()

### toString

    public abstract String toString(String prefix,
                                    String indent)

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