bundles/org.simantics.db.layer0/src/org/simantics/db/layer0/request/VariableRead.java

   1 /*******************************************************************************\r
   2  * Copyright (c) 2007, 2010 Association for Decentralized Information Management\r
   3  * in Industry THTH ry.\r
   4  * All rights reserved. This program and the accompanying materials\r
   5  * are made available under the terms of the Eclipse Public License v1.0\r
   6  * which accompanies this distribution, and is available at\r
   7  * http://www.eclipse.org/legal/epl-v10.html\r
   8  *\r
   9  * Contributors:\r
  10  *     VTT Technical Research Centre of Finland - initial API and implementation\r
  11  *******************************************************************************/\r
  12 package org.simantics.db.layer0.request;\r
  13 \r
  14 import org.simantics.db.AsyncRequestProcessor;\r
  15 import org.simantics.db.RequestProcessor;\r
  16 import org.simantics.db.exception.DatabaseException;\r
  17 import org.simantics.db.layer0.variable.Variable;\r
  18 import org.simantics.db.procedure.AsyncListener;\r
  19 import org.simantics.db.procedure.AsyncProcedure;\r
  20 import org.simantics.db.procedure.Listener;\r
  21 import org.simantics.db.procedure.Procedure;\r
  22 import org.simantics.db.procedure.SyncListener;\r
  23 import org.simantics.db.procedure.SyncProcedure;\r
  24 import org.simantics.db.request.Read;\r
  25 import org.simantics.db.request.ReadInterface;\r
  26 \r
  27 public abstract class VariableRead<T> implements Read<T>, ReadInterface<T> {\r
  28 \r
  29     final protected Variable variable;\r
  30 \r
  31     @Override\r
  32     public int hashCode() {\r
  33         return variable.hashCode();\r
  34     }\r
  35     \r
  36     protected Class<?> clazz() {\r
  37         return getClass();\r
  38     }\r
  39 \r
  40     @Override\r
  41     public boolean equals(Object object) {\r
  42         if (this == object)\r
  43             return true;\r
  44         else if (object == null)\r
  45             return false;\r
  46         else if (!clazz().isInstance(object))\r
  47             return false;\r
  48         VariableRead<?> r = (VariableRead<?>) object;\r
  49         return variable.equals(r.variable);\r
  50     }\r
  51 \r
  52     public VariableRead(Variable variable) {\r
  53         if(variable == null) throw new IllegalArgumentException("Null variable.");\r
  54         this.variable = variable;\r
  55     }\r
  56 \r
  57     @Override\r
  58     public void request(AsyncRequestProcessor processor, AsyncProcedure<T> procedure) {\r
  59         processor.asyncRequest(this, procedure);\r
  60     }\r
  61     \r
  62     @Override\r
  63     public void request(AsyncRequestProcessor processor, Procedure<T> procedure) {\r
  64         processor.asyncRequest(this, procedure);\r
  65     }\r
  66     \r
  67     @Override\r
  68     public void request(AsyncRequestProcessor processor, SyncProcedure<T> procedure) {\r
  69         processor.asyncRequest(this, procedure);\r
  70     }\r
  71 \r
  72     @Override\r
  73     public void request(AsyncRequestProcessor processor, AsyncListener<T> procedure) {\r
  74         processor.asyncRequest(this, procedure);\r
  75     }\r
  76     \r
  77     @Override\r
  78     public void request(AsyncRequestProcessor processor, Listener<T> procedure) {\r
  79         processor.asyncRequest(this, procedure);\r
  80     }\r
  81     \r
  82     @Override\r
  83     public void request(AsyncRequestProcessor processor, SyncListener<T> procedure) {\r
  84         processor.asyncRequest(this, procedure);\r
  85     }\r
  86     \r
  87     @Override\r
  88     public T request(RequestProcessor processor) throws DatabaseException {\r
  89         return processor.syncRequest(this);\r
  90     }\r
  91     \r
  92     @Override\r
  93     public String toString() {\r
  94         return getClass().getSimpleName() + "|" + variable; \r
  95     }\r
  96     \r
  97 }\r