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Java > Open Source Codes > com > genimen > djeneric > tools > scriptengine > core > nodes > DeleteStatementNode


1 /*
2  * Copyright (c) 2001-2005 by Genimen BV (www.genimen.com) All rights reserved.
3  *
4  * Redistribution and use in source and binary forms, with or without
5  * modification, is permitted provided that the following conditions are met: -
6  * Redistributions of source code must retain the above copyright notice, this
7  * list of conditions and the following disclaimer. - Redistributions in binary
8  * form must reproduce the above copyright notice, this list of conditions and
9  * the following disclaimer in the documentation and/or other materials
10  * provided with the distribution. - All advertising materials mentioning
11  * features or use of this software must display the following acknowledgment:
12  * "This product includes Djeneric." - Products derived from this software may
13  * not be called "Djeneric" nor may "Djeneric" appear in their names without
14  * prior written permission of Genimen BV. - Redistributions of any form
15  * whatsoever must retain the following acknowledgment: "This product includes
16  * Djeneric."
17  *
18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER AND CONTRIBUTORS "AS IS"
19  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21  * ARE DISCLAIMED. IN NO EVENT SHALL GENIMEN BV, DJENERIC.ORG, OR CONTRIBUTORS
22  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
23  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
24  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
25  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
26  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
27  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
28  * POSSIBILITY OF SUCH DAMAGE.
29  */
30 package com.genimen.djeneric.tools.scriptengine.core.nodes;
31
32 import com.genimen.djeneric.language.Messages;
33 import com.genimen.djeneric.repository.DjObject;
34 import com.genimen.djeneric.repository.exceptions.DjenericException;
35 import com.genimen.djeneric.repository.exceptions.ObjectNotDefinedException;
36 import com.genimen.djeneric.tools.scriptengine.core.DjScriptParserEngine;
37 import com.genimen.djeneric.tools.scriptengine.core.SimpleNode;
38 import com.genimen.djeneric.tools.scriptengine.core.util.DjScriptCompileTimeScope;
39 import com.genimen.djeneric.tools.scriptengine.core.util.DjScriptExecutionException;
40 import com.genimen.djeneric.tools.scriptengine.core.util.DjScriptExecutionTimeScope;
41
42 public class DeleteStatementNode extends SimpleNode
43 {
44
45   public DeleteStatementNode(int i)
46   {
47     super(i);
48   }
49
50   public DeleteStatementNode(DjScriptParserEngine p, int i)
51   {
52     super(p, i);
53   }
54
55   public String JavaDoc getName()
56   {
57     return "delete";
58   }
59
60   public String JavaDoc toString()
61   {
62     return getName();
63   }
64
65   public void execute(DjScriptExecutionTimeScope context) throws DjScriptExecutionException
66   {
67     PropertyPathNode propNode = (PropertyPathNode) getChild(PropertyPathNode.class);
68
69     Object JavaDoc o = context.getPropertyValue(propNode.getPath(), this);
70     if (!(o instanceof DjObject)) throw new DjScriptExecutionException(Messages
71         .getString("DeleteStatementNode.NotAModelObject"), this);
72     try
73     {
74       ((DjObject) o).markForDelete();
75       // Set all variables pointing directly to this object to null
76 context.clearPointerVariables(o);
77     }
78     catch (DjenericException e)
79     {
80       throw new DjScriptExecutionException(e.getMessage(), this);
81     }
82   }
83
84   public void validateScript(DjScriptCompileTimeScope ctxt) throws DjScriptExecutionException
85   {
86     PropertyPathNode propNode = (PropertyPathNode) getChild(PropertyPathNode.class);
87     String JavaDoc tp = ctxt.getPropertyType(propNode.getPath(), this);
88     try
89     {
90       ctxt.getPersistenceManager().getExtentByObjectType(tp);
91     }
92     catch (ObjectNotDefinedException onde)
93     {
94       throw new DjScriptExecutionException(tp + " is geen persistent objecttype", this);
95     }
96   }
97
98 }
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