String2FloatValidator


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   * FloatValidator.  Verify string to float data conversion
19   */
20  public class String2FloatValidator implements IValidator {
21      
22      public ValidationError isPartiallyValid(Object   fragment) {
23          if (((String  )fragment).matches("\\-?[0-9]*\\.?[0-9]*([0-9]+[e|E]\\-?([0-9]+\\.)?[0-9]*)?")) //$NON-NLS-1$
24              return null;
25  
26          return ValidationError.error(getHint());
27      }
28      
29      public ValidationError isValid(Object   value) {
30          try {
31              Float.parseFloat((String  )value);
32              return null;
33          } catch (Exception   e) {
34              return ValidationError.error(getHint());
35          }
36      }
37  
38      private String   getHint() {
39          return BindingMessages.getString("Validate_Like") +  //$NON-NLS-1$
40          BindingMessages.getString("Validate_Number_Examples") //$NON-NLS-1$
41          + Float.MIN_VALUE + 
42          ", " + Float.MAX_VALUE + "."; //$NON-NLS-1$ //$NON-NLS-2$
43      }
44  
45  }
46

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