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

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Here is the source code for org.openmrs.module.htmlwidgets.web.handler.StringHandler.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.IOException;
import java.io.Writer;

import org.apache.commons.lang.StringUtils;
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.TextWidget;
import org.openmrs.module.htmlwidgets.web.html.Widget;
import org.openmrs.module.htmlwidgets.web.html.WidgetFactory;

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

    /** 
     * @see WidgetHandler#render(WidgetConfig)
     */
    @Override
    public void render(WidgetConfig config, Writer w) throws IOException {

        Widget widget = null;

        if (config.getType() == Character.class) {
            widget = WidgetFactory.getInstance(TextWidget.class, config);
            config.setConfiguredAttribute("size", "2");
            config.setConfiguredAttribute("maxLength", "1");
        } else {
            String rows = config.getAttributeValue("rows");
            String cols = config.getAttributeValue("cols");
            if (StringUtils.isNotEmpty(rows) || StringUtils.isNotEmpty(cols)
                    || "textarea".equals(config.getFormat())) {
                widget = WidgetFactory.getInstance(TextAreaWidget.class, config);
            } else {
                widget = WidgetFactory.getInstance(TextWidget.class, config);
                config.setConfiguredAttribute("size", "40");
            }
        }
        widget.render(config, w);
    }

    /** 
     * @see WidgetHandler#parse(String, Class<?>)
     */
    @Override
    public Object parse(String input, Class<?> type) {
        if (StringUtils.isNotBlank(input)) {
            if (Character.class.isAssignableFrom(type)) {
                if (input.length() > 1) {
                    throw new IllegalArgumentException("Unable to parse '" + input + "' into a Character");
                }
                return (input.length() == 0 ? null : Character.valueOf(input.charAt(0)));
            }
            return input;
        }
        return null;
    }
}