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.

        }
    }


    private void writeParameter(XMLStreamWriter writer, int index, FilterProperty property) {
        try {
            PropertyEditor editor = property.getPropertyEditor();
            if (editor == null) {
                editor = PropertyEditorManager.findEditor(property.getValueType());
            }
            if (editor == null) {
                return;
            }
            Object val = property.getValue();
            editor.setValue(val);
            writer.writeStartElement("parameter");
            writer.writeAttribute("index", String.valueOf(index));
            writer.writeCharacters(editor.getAsText());
            writer.writeEndElement();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

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                        int index = Integer.parseInt(reader.getAttributeValue(null, "index"));
                        property = query.getFilter().getProperties()[index];
                    }
                } else if (eventType.equals(XMLStreamReader.CHARACTERS) && property != null) {
                    try {
                        PropertyEditor editor = property.getPropertyEditor();
                        if (editor == null) {
                            editor = PropertyEditorManager.findEditor(property.getValueType());
                        }
                        if (editor != null) {
                            String textValue = reader.getText();
                            editor.setAsText(textValue);
                            property.setValue(editor.getValue());
                            model.updateParameters(query);
                        }
                    } catch (Exception e) {
                        e.printStackTrace();
                    }

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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);
                }
            }
            if(propertyEditor instanceof TestBeanPropertyEditor)
            {
                ((TestBeanPropertyEditor)propertyEditor).setDescriptor(descriptors[i]);
            }
            if (propertyEditor.getCustomEditor() instanceof JScrollPane) {
                scrollerCount++;
            }


            editors[i] = propertyEditor;

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        boolean notNull = Boolean.TRUE.equals(descriptor.getValue(NOT_UNDEFINED));
        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 {
            ComboStringEditor e = new ComboStringEditor();
            e.setNoUndefined(notNull);

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    /**
     * Save values from the GUI fields into the property map
     */
    void saveGuiFields() {
        for (int i = 0; i < editors.length; i++) {
            PropertyEditor propertyEditor=editors[i]; // might be null (e.g. in testing)
            if (propertyEditor != null) {
                Object value = propertyEditor.getValue();
                String name = descriptors[i].getName();
                if (value == null) {
                    propertyMap.remove(name);
                    if (log.isDebugEnabled()) {
                        log.debug("Unset " + name);

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        }
    }


    void clearGuiFields() {
        for (int i = 0; i < editors.length; i++) {
            PropertyEditor propertyEditor=editors[i]; // might be null (e.g. in testing)
            if (propertyEditor != null) {
                try {
                if (propertyEditor instanceof WrapperEditor){
                    WrapperEditor we = (WrapperEditor) propertyEditor;
                    String tags[]=we.getTags();
                    if (tags != null && tags.length > 0) {
                        we.setAsText(tags[0]);
                    } else {
                        we.setValue("");
                    }
                } else if (propertyEditor instanceof ComboStringEditor) {
                    ComboStringEditor cse = (ComboStringEditor) propertyEditor;
                    cse.setAsText(cse.getInitialEditValue());
                } else {
                    propertyEditor.setAsText("");
                }
                } catch (IllegalArgumentException ex){
                    log.error("Failed to set field "+descriptors[i].getName(),ex);
                }
            }

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            throwMBeanException(new IllegalArgumentException(
                    "Unknown attribute: " + aname));
        }
        
        try {
            PropertyEditor e = getPropertyEditor(
                    getParent(aname).getClass(),
                    pdesc.getName(), pdesc.getPropertyType());
            e.setAsText((String) avalue);
            OgnlContext ctx = (OgnlContext) Ognl.createDefaultContext(source);
            ctx.setTypeConverter(typeConverter);
            Ognl.setValue(aname, ctx, source, e.getValue());
        } catch (Throwable e) {
            throwMBeanException(e);
        }
    }

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                paramTypes[i] = getAttributeClass(signature[i]);
            } catch (ClassNotFoundException e) {
                throwMBeanException(e);
            }
            
            PropertyEditor e = getPropertyEditor(
                    source.getClass(), "p" + i, paramTypes[i]);
            if (e == null) {
                throwMBeanException(new RuntimeException("Conversion failure: " + params[i]));
            }
            
            e.setValue(params[i]);
            params[i] = e.getAsText();
        }
        
        try {
            // Find the right method.
            for (Method m: source.getClass().getMethods()) {
                if (!m.getName().equalsIgnoreCase(name)) {
                    continue;
                }
                Class<?>[] methodParamTypes = m.getParameterTypes();
                if (methodParamTypes.length != params.length) {
                    continue;
                }
                
                Object[] convertedParams = new Object[params.length];
                for (int i = 0; i < params.length; i ++) {
                    if (Iterable.class.isAssignableFrom(methodParamTypes[i])) {
                        // Generics are not supported.
                        convertedParams = null;
                        break;
                    }
                    PropertyEditor e = getPropertyEditor(source.getClass(), "p" + i, methodParamTypes[i]);
                    if (e == null) {
                        convertedParams = null;
                        break;
                    }


                    e.setAsText((String) params[i]);
                    convertedParams[i] = e.getValue();
                }
                if (convertedParams == null) {
                    continue;
                }

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                    return v;
                }
            }
        }
        
        PropertyEditor editor = getPropertyEditor(type, attrName, v.getClass());
        if (editor != null) {
            editor.setValue(v);
            return editor.getAsText();
        }
        
        return v.toString();
    }

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    private synchronized Object getValue(GAttributeInfo attribute, String value, Artifact configurationName, AbstractName gbeanName, ClassLoader classLoader) {
        if (value == null) {
            return null;
        }
        value = substituteVariables(attribute.getName(), value);
        PropertyEditor editor = loadPropertyEditor(attribute, classLoader);
        editor.setAsText(value);
        log.debug("Setting value for " + configurationName + "/" + gbeanName + "/" + attribute.getName() + " to value " + value);
        return editor.getValue();
    }

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