Examples of org.apache.commons.beanutils.Converter

org.apache.commons.beanutils.Converter

General purpose data type converter that can be registered and used within the BeanUtils package to manage the conversion of objects from one type to another.

Converter subclasses bundled with the BeanUtils library are required to be thread-safe, as users of the library may call conversion methods from more than one thread simultaneously.

Custom converter subclasses created by users of the library can be non-thread-safe if the application using them is single-threaded. However it is recommended that they be written in a thread-safe manner anyway.
@author Craig McClanahan @author Paulo Gaspar @version $Revision: 555824 $ $Date: 2007-07-13 01:27:15 +0100 (Fri, 13 Jul 2007) $ @since 1.3

        ObjectStringConverter converter = new ConvertUtilsObjectStringConverter();
        commonTestForConvertUtilsConverters( converter );
    }
    
    private void commonTestForConvertUtilsConverters(ObjectStringConverter objectStringConverter) {
        Converter converter = new Converter() {
            public Object convert(Class type, Object value) {
                if ( type == SecurityManager.class) {
                    return "Life, The Universe And Everything";
                }
                return "The answer is " + value.toString();

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    }
    
    public void testDefaultOSConverterDates() {
        
    
        Converter converter = new Converter() {
            public Object convert(Class type, Object value) {
                return "Arthur Dent";
            }
        };
        
        ConvertUtils.register( converter, java.sql.Date.class );
        
        converter = new Converter() {
            public Object convert(Class type, Object value) {
                return "Ford Prefect";
            }
        };
        
        ConvertUtils.register( converter, String.class );
        
        converter = new Converter() {
            public Object convert(Class type, Object value) {
                return "Marvin";
            }
        };

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    public EnumerationConverterTestCase(String name) {
        super(name);
    }


    public void testEnum() {
        Converter converter = EnumerationConverter.getInstance();


        Thread.State expected = Thread.State.TERMINATED;
        Thread.State actual = (Thread.State) converter.convert(Thread.State.class,
                Thread.State.TERMINATED.name());
        assertEquals(expected, actual);
    }

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    // See http://www.jidesoft.com for licensing terms.


    //
    // Register a converter from a String to a File with PropertyUtils.


    ConvertUtils.register(new Converter() {
      public Object convert(Class arg0, Object filename) {
        return new File((String) filename);
      }
    }, File.class);

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        if (returnType.equals(Class.class)) {
            value = toQualifiedClassName(value, defaultPackage);
        }


        /* Converter lookup */
        Converter converter = ConvertUtils.lookup(returnType);
        if (converter == null && returnType.isEnum()) {
            converter = EnumerationConverter.getInstance();
        }
        
        return converter.convert(returnType, value);
    }

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            if (value != null) {
                return value;
            }
        }


        Converter converter = ConvertUtils.lookup(useType);
        if (converter != null) {
            return converter.convert(useType, object);
        }


        throw new JXPathTypeConversionException("Cannot convert "
                + object.getClass() + " to " + useType);
    }

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            }
        }
        
        if (destType != null)
        {
            Converter converter = ConvertUtils.lookup(destType);
            if (converter == null)
            {
                throw new UnsupportedOperationException("cant deal with " + destType);
            }


            // setting type to null, in fact the documentation is wrong here and this type is never used
            convertedValue = converter.convert(null, convertedValue);
        }
        
        
        return convertedValue;
    }

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  public double getParameterAsDouble(String name)
  {
    assert name != null;


    Converter c = ConvertUtils.lookup(java.lang.Double.class);


    return ((Double) c.convert(java.lang.Double.class, getParameterAsString(name))).doubleValue();
  }

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  public float getParameterAsFloat(String name)
  {
    assert name != null;


    Converter c = ConvertUtils.lookup(java.lang.Float.class);


    return ((Float) c.convert(java.lang.Float.class, getParameterAsString(name))).floatValue();
  }

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  public int getParameterAsInt(String name)
  {
    assert name != null;


    Converter c = ConvertUtils.lookup(java.lang.Integer.class);


    return ((Integer) c.convert(java.lang.Integer.class, getParameterAsString(name))).intValue();
  }

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