v2/src/binding/org/apache/xmlbeans/impl/binding/joust/ExpressionFactory.java

/*
* The Apache Software License, Version 1.1
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* Copyright (c) 2003 The Apache Software Foundation.  All rights
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* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation and was
* originally based on software copyright (c) 2003 BEA Systems
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package org.apache.xmlbeans.impl.binding.joust;

/**
 * Creates instances of Expression to be used in conjunction with a
 * JavaOutputStream.  Instances of ExpressionFactory are retrieved via
 * JavaOutputStream.getExpressionFactory().
 *
 * We'll probably have to add more methods here to accommodate more
 * primitives, arrays and so forth.
 *
 * @author Patrick Calahan <pcal@bea.com>
 */
public interface ExpressionFactory {

  /**
   * Returns an expression representing a constant boolean value.
   */
  public Expression createBoolean(boolean value);

  /**
   * Returns an expression representing a literal string.
   */
  public Expression createString(String value);

  /**
   * Returns an expression representing a constant int.
   */
  public Expression createInt(int value);

  /**
   * Returns an expression representing the 'null' token.
   */
  public Expression createNull();

}