//--------------------------------------------------------------------------
// Copyright (c) 1998-2004, Drew Davidson and Luke Blanshard
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// Redistributions of source code must retain the above copyright notice,
// this list of conditions and the following disclaimer.
// Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
// Neither the name of the Drew Davidson nor the names of its contributors
// may be used to endorse or promote products derived from this software
// without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
// FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
// COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
// BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
// OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
// AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
// OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
// DAMAGE.
//--------------------------------------------------------------------------
package org.apache.ibatis.ognl;
/**
* This class has predefined instances that stand for OGNL's special "dynamic subscripts"
* for getting at the first, middle, or last elements of a list. In OGNL expressions,
* these subscripts look like special kinds of array indexes: [^] means the first element,
* [$] means the last, [|] means the middle, and [*] means the whole list.
*
* @author Luke Blanshard ([email protected])
* @author Drew Davidson ([email protected])
*/
public class DynamicSubscript {
public static final int FIRST = 0;
public static final int MID = 1;
public static final int LAST = 2;
public static final int ALL = 3;
public static final DynamicSubscript first = new DynamicSubscript(FIRST);
public static final DynamicSubscript mid = new DynamicSubscript(MID);
public static final DynamicSubscript last = new DynamicSubscript(LAST);
public static final DynamicSubscript all = new DynamicSubscript(ALL);
private int flag;
private DynamicSubscript(int flag) {
this.flag = flag;
}
public int getFlag() {
return flag;
}
public String toString() {
switch (flag) {
case FIRST:
return "^";
case MID:
return "|";
case LAST:
return "$";
case ALL:
return "*";
default:
return "?"; // Won't happen
}
}
}
|