Examples of org.apache.click.control.Form.copyFrom()

org.apache.click.control.Form.copyFrom()
Copy the given object's attributes into the Form's field values. In other words automatically populate Form's field values with the given objects attributes.
The following example populates the Form field with Customer attributes:
```
 public void onGet() { Long customerId = .. Customer customer = CustomerDAO.findByPK(customerId); form.copyFrom(customer); } 
```
copyForm also supports java.util.Map as an argument.
By specifying a map, the Form's field values will be populated by matching key/value pairs. A match occurs when the map's key is equal to a field's name.
The following example populates the Form fields with a map's key/value pairs:
```
 public void onInit() { form = new Form("form"); form.add(new TextField("name")); form.add(new TextField("address.street")); } public void onGet() { Map map = new HashMap(); map.put("name", "Steve"); map.put("address.street", "12 Long street"); form.copyFrom(map); } 
```
For more information on how Fields and Objects are copied see {@link org.apache.click.util.ContainerUtils#copyObjectToContainer(java.lang.Object,org.apache.click.control.Container)}. @param object the object to obtain attribute values from @throws IllegalArgumentException if the object parameter is null

        user.getAddress().getState().setCode("NSW");
        
        form = new Form();
        TextField codeField = new TextField("address.state.code");
        form.add(codeField);
        form.copyFrom(user, true);
        assertEquals("NSW", codeField.getValueObject());
        
        Map map = new HashMap();
        map.put("name", "malcolm");
        form = new Form();

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        Map map = new HashMap();
        map.put("name", "malcolm");
        form = new Form();
        TextField nameField2 = new TextField("name");
        form.add(nameField2);
        form.copyFrom(map, true);
        assertEquals("malcolm", nameField2.getValue());
    }


    /**
     * Test that the map are populated from field values.

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        form.add(streetField);
        TextField stateCodeField = new TextField("address.state.code");
        form.add(stateCodeField);


        // Copy the map values into the fields
        form.copyFrom(map, true);


        // Test that values were copied
        assertEquals(id, new Integer(idField.getValue()));
        assertEquals(name, nameField.getValue());
        assertEquals(age, new Integer(ageField.getValue()));

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        user.getAddress().getState().setCode("NSW");
        
        form = new Form();
        TextField codeField = new TextField("address.state.code");
        form.add(codeField);
        form.copyFrom(user, true);
        assertEquals("NSW", codeField.getValueObject());
        
        Map map = new HashMap();
        map.put("name", "malcolm");
        form = new Form();

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        Map map = new HashMap();
        map.put("name", "malcolm");
        form = new Form();
        TextField nameField2 = new TextField("name");
        form.add(nameField2);
        form.copyFrom(map, true);
        assertEquals("malcolm", nameField2.getValue());
    }
    
    public void testCopyToNullNestedObject() {
        final String lineOne = "55 Dunkley Avenue";

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        user.getAddress().getState().setCode("NSW");
        
        form = new Form();
        TextField codeField = new TextField("address.state.code");
        form.add(codeField);
        form.copyFrom(user, true);
        assertEquals("NSW", codeField.getValueObject());
        
        Map<String, Object> map = new HashMap<String, Object>();
        map.put("name", "malcolm");
        form = new Form();

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        Map<String, Object> map = new HashMap<String, Object>();
        map.put("name", "malcolm");
        form = new Form();
        TextField nameField2 = new TextField("name");
        form.add(nameField2);
        form.copyFrom(map, true);
        assertEquals("malcolm", nameField2.getValue());
    }


    /**
     * Test that the map are populated from field values.

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        form.add(streetField);
        TextField stateCodeField = new TextField("address.state.code");
        form.add(stateCodeField);


        // Copy the map values into the fields
        form.copyFrom(map, true);


        // Test that values were copied
        assertEquals(id, new Integer(idField.getValue()));
        assertEquals(name, nameField.getValue());
        assertEquals(age, new Integer(ageField.getValue()));

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        user.getAddress().getState().setCode("NSW");
        
        form = new Form();
        TextField codeField = new TextField("address.state.code");
        form.add(codeField);
        form.copyFrom(user, true);
        assertEquals("NSW", codeField.getValueObject());
        
        Map<String, Object> map = new HashMap<String, Object>();
        map.put("name", "malcolm");
        form = new Form();

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        Map<String, Object> map = new HashMap<String, Object>();
        map.put("name", "malcolm");
        form = new Form();
        TextField nameField2 = new TextField("name");
        form.add(nameField2);
        form.copyFrom(map, true);
        assertEquals("malcolm", nameField2.getValue());
    }
    
    public void testCopyToNullNestedObject() {
        final String lineOne = "55 Dunkley Avenue";

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