org.openmrs.module.htmlwidgets.web.handler.PropertiesHandler.java Source code

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Here is the source code for org.openmrs.module.htmlwidgets.web.handler.PropertiesHandler.java

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/**
 * The contents of this file are subject to the OpenMRS Public License
 * Version 1.0 (the "License"); you may not use this file except in
 * compliance with the License. You may obtain a copy of the License at
 * http://license.openmrs.org
 *
 * Software distributed under the License is distributed on an "AS IS"
 * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
 * License for the specific language governing rights and limitations
 * under the License.
 *
 * Copyright (C) OpenMRS, LLC.  All Rights Reserved.
 */
package org.openmrs.module.htmlwidgets.web.handler;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.io.Writer;
import java.util.Properties;

import org.openmrs.annotation.Handler;
import org.openmrs.module.htmlwidgets.web.WidgetConfig;
import org.openmrs.module.htmlwidgets.web.html.TextAreaWidget;
import org.openmrs.module.htmlwidgets.web.html.WidgetFactory;
import org.openmrs.util.OpenmrsUtil;
import org.springframework.util.StringUtils;

/**
 * FieldGenHandler for Properties Types
 */
@Handler(supports = { Properties.class }, order = 50)
public class PropertiesHandler extends WidgetHandler {

    /** 
     * @see WidgetHandler#render(WidgetConfig)
     */
    @Override
    public void render(WidgetConfig config, Writer w) throws IOException {
        TextAreaWidget widget = WidgetFactory.getInstance(TextAreaWidget.class, config);
        Properties p = (Properties) config.getDefaultValue();
        if (p != null && !p.isEmpty()) {
            ByteArrayOutputStream baos = new ByteArrayOutputStream();
            OpenmrsUtil.storeProperties(p, baos, null);
            try {
                config.setDefaultValue(baos.toString("UTF-8"));
            } catch (UnsupportedEncodingException e) {
                throw new RuntimeException("Unable to load properties from string", e);
            }
        } else {
            config.setDefaultValue(null);
        }
        widget.render(config, w);
    }

    /** 
     * @see WidgetHandler#parse(String, Class<?>)
     */
    @Override
    public Object parse(String input, Class<?> type) {
        if (StringUtils.hasText(input)) {
            Properties p = new Properties();
            try {
                OpenmrsUtil.loadProperties(p, new ByteArrayInputStream(input.getBytes("UTF-8")));
            } catch (UnsupportedEncodingException e) {
                throw new RuntimeException("Unable to load properties from string", e);
            }
            return p;
        }
        return null;
    }
}