Examples of java.beans.PropertyEditor

java.beans.PropertyEditor
A PropertyEditor class provides support for GUIs that want to allow users to edit a property value of a given type.
PropertyEditor supports a variety of different kinds of ways of displaying and updating property values. Most PropertyEditors will only need to support a subset of the different options available in this API.
Simple PropertyEditors may only support the getAsText and setAsText methods and need not support (say) paintValue or getCustomEditor. More complex types may be unable to support getAsText and setAsText but will instead support paintValue and getCustomEditor.
Every propertyEditor must support one or more of the three simple display styles. Thus it can either (1) support isPaintable or (2) both return a non-null String[] from getTags() and return a non-null value from getAsText or (3) simply return a non-null String from getAsText().
Every property editor must support a call on setValue when the argument object is of the type for which this is the corresponding propertyEditor. In addition, each property editor must either support a custom editor, or support setAsText.
Each PropertyEditor should have a null constructor.

    }


    protected PropertyEditor loadPropertyEditor(GAttributeInfo attribute, ClassLoader classLoader) {
        String propertyEditor = propertyEditors.get(attribute.getName());
        if (null == propertyEditor) {
            PropertyEditor editor;
            try {
                editor = PropertyEditors.findEditor(attribute.getType(), classLoader);
            } catch (ClassNotFoundException e) {
                log.error("Unable to load attribute type " + attribute.getType());
                return null;

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            if (null == value || value instanceof String) {
                return (String) value;
            }
            
            Class typeClass = ClassLoading.loadClass(type, classLoader);
            PropertyEditor editor = PropertyEditors.findEditor(value.getClass());
            if (null == editor) {
                editor = PropertyEditors.findEditor(typeClass);
                if (null == editor) {
                    throw new InvalidAttributeException("Unable to format attribute of type " + type + "; no editor found");
                }
            }
            
            if (!type.equals(value.getClass().getName())
                    && !typeClass.isPrimitive()
                    && !Collection.class.isAssignableFrom(typeClass)) {
                propertyEditors.put(attributeName, editor.getClass().getName());
            }


            editor.setValue(value);
            return editor.getAsText();
        } catch (ClassNotFoundException e) {
            //todo: use the Configuration's ClassLoader to load the attribute, if this ever becomes an issue
            throw (InvalidAttributeException) new InvalidAttributeException("Unable to store attribute type " + type).initCause(e);
        }
    }

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                log.debug("No editor for property "+name);
                editors[i]= null;
                continue;
            }


            PropertyEditor propertyEditor;
            Class editorClass= descriptors[i].getPropertyEditorClass();
            
            if (log.isDebugEnabled())
            {
                log.debug("Property "+name
                        +" has editor class "+editorClass);
            }
            
            if (editorClass != null)
            {
                try
                {
                    propertyEditor= (PropertyEditor)editorClass.newInstance();
                }
                catch (InstantiationException e)
                {
                    log.error("Can't create property editor.", e);
                    throw new Error(e.toString());
                }
                catch (IllegalAccessException e)
                {
                    log.error("Can't create property editor.", e);
                    throw new Error(e.toString());
                }
            }
            else
            {
                Class c= descriptors[i].getPropertyType();
                propertyEditor= PropertyEditorManager.findEditor(c);
            }


            if (log.isDebugEnabled())
            {
                log.debug("Property "+name
                        +" has property editor "+propertyEditor);
            }
            
            if (propertyEditor == null)
            {
                log.debug("No editor for property "+name);
                editors[i]= null;
                continue;
            }
            
            if (! propertyEditor.supportsCustomEditor())
            {
        propertyEditor= createWrapperEditor(
          propertyEditor, descriptors[i]);


        if (log.isDebugEnabled())
        {
          log.debug("Editor for property "+name
              +" is wrapped in "+propertyEditor);
        }
            }
            
      editors[i]= propertyEditor;


      // Initialize the editor with the provided default value or null:
            setEditorValue(i, descriptors[i].getValue(DEFAULT));


            // Now subscribe as a listener (we didn't want to receive the event
            // for the setEditorValue above!)
            propertyEditor.addPropertyChangeListener(this);
        }


    // Obtain message formats:
    propertyFieldLabelMessage= new MessageFormat(  
      JMeterUtils.getResString("property_as_field_label"));

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    boolean notExpression=
      Boolean.TRUE.equals(descriptor.getValue(NOT_EXPRESSION));
    boolean notOther=
      Boolean.TRUE.equals(descriptor.getValue(NOT_OTHER));


    PropertyEditor guiEditor;
    if (notNull && tags==null)
    {
      guiEditor= new FieldStringEditor();
    }
    else

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            throw new IllegalArgumentException("type is null");
        }




        // try to locate this directly from the editor manager first.
        PropertyEditor editor = PropertyEditorManager.findEditor(type);


        // we're outta here if we got one.
        if (editor != null) {
            return editor;
        }

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     *         be resolved.
     * @throws PropertyEditorException Unable to find a suitable editor for this class.
     */
    public static PropertyEditor getEditor(Class type) {
        // just call the non-exceptional lookup
        PropertyEditor editor = findEditor(type);
        // this one throws an exception if not found.
        if (editor == null) {
            throw new PropertyEditorException("No property editor for type: " + type);
        }
        return editor;

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        String value = (String) atts.get(attribute.getName());
        if(value == null) {
            return null; // nothing specified for this attribute
        }
        try {
            PropertyEditor editor = PropertyEditors.findEditor(attribute.getType(), getClass().getClassLoader());
            if (editor == null) {
                log.debug("Unable to parse attribute of type "+attribute.getType()+"; no editor found");
                return null;
            }
            editor.setAsText(value);
            log.debug("Setting value for "+configurationName+"/"+gbean+"/" + attribute.getName() + " to value " + value);
            return editor.getValue();
        } catch (ClassNotFoundException e) {
            //todo: use the Configuration's ClassLoader to load the attribute, if this ever becomes an issue
            log.error("Unable to load attribute type "+attribute.getType());
            return null;
        }

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            }
        }
        try {
            String string = null;
            if(value != null) {
                PropertyEditor editor = PropertyEditors.findEditor(attribute.getType(), getClass().getClassLoader());
                if (editor == null) {
                    log.error("Unable to format attribute of type "+attribute.getType()+"; no editor found");
                    return;
                }
                editor.setValue(value);
                string = editor.getAsText();
            }
            if(string == null) {
                atts.remove(attribute.getName());
            } else {
                atts.put(attribute.getName(), string);

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            return null;
        } else if (pClass.isAssignableFrom(pValue.getClass())) {
            return pValue;
        } else if (pValue instanceof String) {
            String str = (String) pValue;
            PropertyEditor pe = PropertyEditorManager.findEditor(pClass);
            if (pe == null) {
                if ("".equals(str)) {
                    return null;
                } else {
                    if (pLogger.isLoggingError()) {
                        pLogger.logError
                                (Constants.NO_PROPERTY_EDITOR,
                                        str,
                                        pClass.getName());
                    }
                    return null;
                }
            }
            try {
                pe.setAsText(str);
                return pe.getValue();
            }
            catch (IllegalArgumentException exc) {
                if ("".equals(str)) {
                    return null;
                } else {

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  }


  @Test
  public void usesCustomEditorIfConfigured() throws Exception {


    PropertyEditor customEditor = mock(PropertyEditor.class);
    when(customEditor.getValue()).thenReturn(1);


    when(registry.findCustomEditor(Integer.class, null)).thenReturn(customEditor);


    convertsPlainIdTypeCorrectly();

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