org.uimafit.propertyeditors.GetAsTextStringEditor.java Source code

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Here is the source code for org.uimafit.propertyeditors.GetAsTextStringEditor.java

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/*
 Copyright 2009-2012
 Ubiquitous Knowledge Processing (UKP) Lab
 Technische Universitaet Darmstadt
 All rights reserved.
    
 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.
 You may obtain a copy of the License at
    
 http://www.apache.org/licenses/LICENSE-2.0
    
 Unless required by applicable law or agreed to in writing, software
 distributed under the License is distributed on an "AS IS" BASIS,
 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 See the License for the specific language governing permissions and
 limitations under the License.
 */
package org.uimafit.propertyeditors;

import java.beans.PropertyEditor;
import java.beans.PropertyEditorSupport;

import org.springframework.beans.PropertyEditorRegistry;
import org.springframework.beans.PropertyEditorRegistrySupport;

/**
 * Custom property editor that tries to look convert and value to a string by checking if there is
 * a registered property editor for the source value.
 * 
 * @author Richard Eckart de Castilho
 */
public class GetAsTextStringEditor extends PropertyEditorSupport {
    private final PropertyEditorRegistry editorRegistry;
    private final PropertyEditorRegistrySupport editorRegistrySupport;

    public GetAsTextStringEditor(final PropertyEditorRegistry aEditorRegistry) {
        editorRegistry = aEditorRegistry;
        if (aEditorRegistry instanceof PropertyEditorRegistrySupport) {
            editorRegistrySupport = (PropertyEditorRegistrySupport) aEditorRegistry;
        } else {
            editorRegistrySupport = new PropertyEditorRegistrySupport();
        }
    }

    @Override
    public void setValue(Object value) {
        if (value == null || value instanceof String) {
            super.setValue(value);
        } else {
            PropertyEditor editor = editorRegistry.findCustomEditor(value.getClass(), null);
            if (editor == null) {
                editor = editorRegistrySupport.getDefaultEditor(value.getClass());
            }
            if (editor != null) {
                editor.setValue(value);
                super.setValue(editor.getAsText());
            } else if (Enum.class.isAssignableFrom(value.getClass())) {
                super.setValue(String.valueOf(value));
            } else {
                throw new IllegalArgumentException(
                        "Unable to convert " + value.getClass() + " to String. No PropertyEditor found.");
            }
        }
    }

    @Override
    public void setAsText(String text) {
        setValue(text);
    }

    @Override
    public String getAsText() {
        return (String) getValue();
    }
}