String2ByteValidator


1   /*
2    * Copyright (C) 2005 db4objects Inc.  http://www.db4o.com
3    * 
4    * All rights reserved. This program and the accompanying materials
5    * are made available under the terms of the Eclipse Public License v1.0
6    * which accompanies this distribution, and is available at
7    * http://www.eclipse.org/legal/epl-v10.html
8    *
9    * Contributors:
10   *     db4objects - Initial API and implementation
11   */
12  package org.eclipse.jface.internal.databinding.provisional.validation;
13  
14  import org.eclipse.jface.internal.databinding.internal.BindingMessages;
15  
16  
17  /**
18   * ByteValidator.  Validate String input for Bytes
19   */
20  public class String2ByteValidator implements IValidator {
21      
22      /* (non-Javadoc)
23       * @see org.eclipse.jface.databinding.validator.IValidator#isPartiallyValid(java.lang.Object)
24       */
25      public ValidationError isPartiallyValid(Object   fragment) {
26          if (((String  )fragment).matches("\\-?[0-9]*")) //$NON-NLS-1$
27              return null;
28  
29          return ValidationError.error(getHint());
30      }
31      
32      /* (non-Javadoc)
33       * @see org.eclipse.jface.databinding.validator.IValidator#isValid(java.lang.Object)
34       */
35      public ValidationError isValid(Object   value) {
36          try {
37              Byte.parseByte((String  )value);
38              return null;
39          } catch (Throwable   t) {
40              return ValidationError.error(getHint());
41          }
42      }
43  
44      private String   getHint() {
45          return BindingMessages.getString("Validate_RangeStart") + Byte.MIN_VALUE +  //$NON-NLS-1$
46              BindingMessages.getString("and") + Byte.MAX_VALUE + "."; //$NON-NLS-1$ //$NON-NLS-2$
47      }
48  
49  }
50

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