Java tutorial
/* * This Source Code Form is subject to the terms of the Mozilla Public * License, v. 2.0. If a copy of the MPL was not distributed with this * file, You can obtain one at http://mozilla.org/MPL/2.0/. * Copyright (c) 2013, MPL CodeInside http://codeinside.ru */ package ru.codeinside.gses.activiti.ftarchive; import com.vaadin.ui.Field; import com.vaadin.ui.TextArea; import org.apache.commons.lang.StringUtils; import ru.codeinside.gses.activiti.ReadOnly; import ru.codeinside.gses.activiti.forms.api.definitions.PropertyNode; import ru.codeinside.gses.activiti.forms.types.FieldType; import java.io.UnsupportedEncodingException; import java.util.logging.Logger; public class JsonFFT implements FieldType<byte[]> { final private static long serialVersionUID = 1L; final private static ThreadLocal<String> TMP = new ThreadLocal<String>(); @Override public Field createField(String taskId, String fieldId, String name, byte[] value, PropertyNode node, boolean archive) { TMP.remove(); Field result; String stringValue = ""; try { if (value != null) { stringValue = new String(value, "UTF-8"); } } catch (UnsupportedEncodingException e) { Logger.getAnonymousLogger().info("can't decode model!"); } if (!node.isFieldWritable() || archive) { result = new ReadOnly(stringValue); } else { TextArea json = new TextArea(); // json.setColumns(10); json.setSizeFull(); json.setRows(50); json.setImmediate(true); String defaultValue = StringUtils.trimToEmpty(stringValue); FieldHelper.setTextBufferSink(taskId, fieldId, json, true, defaultValue); result = json; } FieldHelper.setCommonFieldProperty(result, node.isFieldWritable() && !archive, name, node.isFieldRequired()); return result; } }