Java tutorial
/** * The contents of this file are subject to the license and copyright * detailed in the LICENSE file at the root of the source * tree and available online at * * https://github.com/keeps/roda */ package org.roda.wui.client.common.utils; import java.util.ArrayList; import java.util.Date; import java.util.List; import java.util.Set; import org.roda.wui.client.browse.MetadataValue; import com.google.gwt.core.client.GWT; import com.google.gwt.event.dom.client.ChangeEvent; import com.google.gwt.event.dom.client.ChangeHandler; import com.google.gwt.event.logical.shared.ValueChangeEvent; import com.google.gwt.event.logical.shared.ValueChangeHandler; import com.google.gwt.i18n.client.DateTimeFormat; import com.google.gwt.i18n.client.LocaleInfo; import com.google.gwt.json.client.JSONArray; import com.google.gwt.json.client.JSONException; import com.google.gwt.json.client.JSONObject; import com.google.gwt.json.client.JSONParser; import com.google.gwt.json.client.JSONString; import com.google.gwt.json.client.JSONValue; import com.google.gwt.user.client.ui.FlowPanel; import com.google.gwt.user.client.ui.Label; import com.google.gwt.user.client.ui.ListBox; import com.google.gwt.user.client.ui.TextArea; import com.google.gwt.user.client.ui.TextBox; import com.google.gwt.user.datepicker.client.DateBox; import config.i18n.client.ClientMessages; /** * Created by adrapereira on 13-06-2016. */ public class FormUtilities { private FormUtilities() { } private static final ClientMessages messages = GWT.create(ClientMessages.class); public static void create(FlowPanel panel, Set<MetadataValue> bundle, boolean addStyle) { for (MetadataValue mv : bundle) { boolean mandatory = (mv.get("mandatory") != null && "true".equalsIgnoreCase(mv.get("mandatory"))) ? true : false; if (mv.get("hidden") != null && "true".equals(mv.get("hidden"))) continue; FlowPanel layout = new FlowPanel(); if (addStyle) { layout.addStyleName("metadata-form-field"); } String controlType = mv.get("type"); if (controlType == null) { addTextField(panel, layout, mv, mandatory); } else { switch (controlType) { case "text": addTextField(panel, layout, mv, mandatory); break; case "textarea": case "big-text": case "text-area": addTextArea(panel, layout, mv, mandatory); break; case "list": addList(panel, layout, mv, mandatory); break; case "date": addDatePicker(panel, layout, mv, mandatory); break; case "separator": layout.addStyleName("form-separator"); addSeparator(panel, layout, mv); break; default: addTextField(panel, layout, mv, mandatory); break; } } } } private static String getFieldLabel(MetadataValue mv) { String result = mv.getId(); String rawLabel = mv.get("label"); if (rawLabel != null && rawLabel.length() > 0) { String loc = LocaleInfo.getCurrentLocale().getLocaleName(); try { JSONObject jsonObject = JSONParser.parseLenient(rawLabel).isObject(); JSONValue jsonValue = jsonObject.get(loc); if (jsonValue != null) { JSONString jsonString = jsonValue.isString(); if (jsonString != null) { result = jsonString.stringValue(); } } else { if (loc.contains("_")) { jsonValue = jsonObject.get(loc.split("_")[0]); if (jsonValue != null) { JSONString jsonString = jsonValue.isString(); if (jsonString != null) { result = jsonString.stringValue(); } } } // label for the desired language doesn't exist // do nothing } } catch (JSONException e) { // The JSON was malformed // do nothing } } mv.set("l", result); return result; } private static void addTextField(FlowPanel panel, final FlowPanel layout, final MetadataValue mv, final boolean mandatory) { // Top label Label mvLabel = new Label(getFieldLabel(mv)); mvLabel.addStyleName("form-label"); if (mandatory) { mvLabel.addStyleName("form-label-mandatory"); } // Field final TextBox mvText = new TextBox(); mvText.setTitle(mvLabel.getText()); mvText.addStyleName("form-textbox"); if (mv.get("value") != null) { mvText.setText(mv.get("value")); } mvText.addChangeHandler(new ChangeHandler() { @Override public void onChange(ChangeEvent changeEvent) { mv.set("value", mvText.getValue()); if (mandatory && (mvText.getValue() != null && !"".equalsIgnoreCase(mvText.getValue().trim()))) { mvText.removeStyleName("isWrong"); } else if (mandatory && (mvText.getValue() == null || "".equals(mvText.getValue().trim()))) { mvText.addStyleName("isWrong"); } } }); layout.add(mvLabel); layout.add(mvText); // Description String description = mv.get("description"); if (description != null && description.length() > 0) { Label mvDescription = new Label(description); mvDescription.addStyleName("form-help"); layout.add(mvDescription); } if (mv.get("error") != null && !"".equals(mv.get("error").trim())) { Label errorLabel = new Label(mv.get("error")); errorLabel.addStyleName("form-label-error"); layout.add(errorLabel); mvText.addStyleName("isWrong"); } panel.add(layout); } private static void addTextArea(FlowPanel panel, final FlowPanel layout, final MetadataValue mv, final boolean mandatory) { // Top label Label mvLabel = new Label(getFieldLabel(mv)); mvLabel.addStyleName("form-label"); if (mandatory) { mvLabel.addStyleName("form-label-mandatory"); } // Field final TextArea mvText = new TextArea(); mvText.setTitle(mvLabel.getText()); mvText.addStyleName("form-textbox metadata-form-text-area"); if (mv.get("value") != null) { mvText.setText(mv.get("value")); } mvText.addChangeHandler(new ChangeHandler() { @Override public void onChange(ChangeEvent changeEvent) { mv.set("value", mvText.getValue()); if (mandatory && (mvText.getValue() != null && !"".equals(mvText.getValue().trim()))) { mvText.removeStyleName("isWrong"); } else if (mandatory && (mvText.getValue() == null || "".equalsIgnoreCase(mvText.getValue().trim()))) { mvText.addStyleName("isWrong"); } } }); layout.add(mvLabel); layout.add(mvText); // Description String description = mv.get("description"); if (description != null && description.length() > 0) { Label mvDescription = new Label(description); mvDescription.addStyleName("form-help"); layout.add(mvDescription); } if (mv.get("error") != null && !"".equalsIgnoreCase(mv.get("error").trim())) { Label errorLabel = new Label(mv.get("error")); errorLabel.addStyleName("form-label-error"); layout.add(errorLabel); mvText.addStyleName("isWrong"); } panel.add(layout); } private static void addList(FlowPanel panel, final FlowPanel layout, final MetadataValue mv, final boolean mandatory) { // Top Label Label mvLabel = new Label(getFieldLabel(mv)); mvLabel.addStyleName("form-label"); if (mandatory) { mvLabel.addStyleName("form-label-mandatory"); } // Field final ListBox mvList = new ListBox(); mvList.setTitle(mvLabel.getText()); mvList.addStyleName("form-textbox"); String options = mv.get("options"); JSONArray optionsArray = null; if (options != null) { optionsArray = JSONParser.parseLenient(options).isArray(); } String list = mv.get("optionsLabels"); mvList.addItem(""); if (list != null) { JSONArray jsonArray = JSONParser.parseLenient(list).isArray(); if (jsonArray != null) { for (int i = 0; i < jsonArray.size(); i++) { String value = jsonArray.get(i).isString().stringValue(); mvList.addItem(value); if (value.equals(mv.get("value"))) { mvList.setSelectedIndex(i + 1); } } } else { JSONObject jsonObject = JSONParser.parseLenient(list).isObject(); if (jsonObject != null) { String loc = LocaleInfo.getCurrentLocale().getLocaleName(); int i = 0; if (optionsArray != null) { for (int pos = 0; pos < optionsArray.size(); pos++) { String key = optionsArray.get(pos).isString().stringValue(); JSONValue entry = jsonObject.get(key); if (entry.isObject() != null) { JSONValue jsonValue = entry.isObject().get(loc); String value; if (jsonValue != null) { value = jsonValue.isString().stringValue(); } else { value = entry.isObject().get(entry.isObject().keySet().iterator().next()) .isString().stringValue(); } if (value != null) { mvList.addItem(value, key); if (key.equals(mv.get("value"))) { mvList.setSelectedIndex(i + 1); } } } i++; } } else { for (String key : jsonObject.keySet()) { JSONValue entry = jsonObject.get(key); if (entry.isObject() != null) { JSONValue jsonValue = entry.isObject().get(loc); String value; if (jsonValue != null) { value = jsonValue.isString().stringValue(); } else { value = entry.isObject().get(entry.isObject().keySet().iterator().next()) .isString().stringValue(); } if (value != null) { mvList.addItem(value, key); if (key.equals(mv.get("value"))) { mvList.setSelectedIndex(i + 1); } } } i++; } } } } } else { if (optionsArray != null) { int i = 0; for (int pos = 0; pos < optionsArray.size(); pos++) { String key = optionsArray.get(pos).isString().stringValue(); if (key != null) { mvList.addItem(key, key); if (key.equals(mv.get("value"))) { mvList.setSelectedIndex(i + 1); } } i++; } } } mvList.addChangeHandler(new ChangeHandler() { @Override public void onChange(ChangeEvent changeEvent) { mv.set("value", mvList.getSelectedValue()); if (mandatory && (mvList.getSelectedValue() != null && !"".equals(mvList.getSelectedValue().trim()))) { mvList.removeStyleName("isWrong"); } if (mandatory && (mvList.getSelectedValue() == null || "".equalsIgnoreCase(mvList.getSelectedValue().trim()))) { mvList.removeStyleName("isWrong"); } } }); if (mv.get("value") == null || mv.get("value").isEmpty()) { mvList.setSelectedIndex(0); mv.set("value", mvList.getSelectedValue()); } layout.add(mvLabel); layout.add(mvList); // Description String description = mv.get("description"); if (description != null && description.length() > 0) { Label mvDescription = new Label(description); mvDescription.addStyleName("form-help"); layout.add(mvDescription); } if (mv.get("error") != null && !"".equals(mv.get("error").trim())) { Label errorLabel = new Label(mv.get("error")); errorLabel.addStyleName("form-label-error"); layout.add(errorLabel); mvList.addStyleName("isWrong"); } panel.add(layout); } private static void addDatePicker(FlowPanel panel, final FlowPanel layout, final MetadataValue mv, final boolean mandatory) { // Top label final DateTimeFormat dateTimeFormat = DateTimeFormat.getFormat("yyyy-MM-dd"); Label mvLabel = new Label(getFieldLabel(mv)); mvLabel.addStyleName("form-label"); if (mandatory) { mvLabel.addStyleName("form-label-mandatory"); } // Field final DateBox mvDate = new DateBox(); mvDate.setTitle(mvLabel.getText()); mvDate.getDatePicker().setYearAndMonthDropdownVisible(true); mvDate.getDatePicker().setYearArrowsVisible(true); mvDate.addStyleName("form-textbox"); mvDate.setFormat(new DateBox.DefaultFormat() { @Override public String format(DateBox dateBox, Date date) { if (date == null) return null; return dateTimeFormat.format(date); } }); String value = mv.get("value"); if (value != null && value.length() > 0) { try { Date date = dateTimeFormat.parse(value.trim()); mvDate.setValue(date); } catch (IllegalArgumentException iae) { mvDate.getTextBox().setValue(value); } } mvDate.addValueChangeHandler(new ValueChangeHandler<Date>() { @Override public void onValueChange(ValueChangeEvent<Date> valueChangeEvent) { String newValue = dateTimeFormat.format(mvDate.getValue()); mv.set("value", newValue); if (mandatory && (newValue != null && !"".equals(newValue.trim()))) { mvDate.removeStyleName("isWrong"); } else if (mandatory && (newValue == null || "".equals(newValue.trim()))) { mvDate.addStyleName("isWrong"); } } }); mvDate.getTextBox().addValueChangeHandler(new ValueChangeHandler<String>() { @Override public void onValueChange(ValueChangeEvent<String> event) { String value = event.getValue(); try { Date date = dateTimeFormat.parse(value.trim()); mvDate.setValue(date); mv.set("value", value); } catch (IllegalArgumentException iae) { if (event.getValue() == null || "".equals(event.getValue().trim())) { mv.set("value", null); } mvDate.getTextBox().setValue(value); } } }); layout.add(mvLabel); layout.add(mvDate); // Description String description = mv.get("description"); if (description != null && description.length() > 0) { Label mvDescription = new Label(description); mvDescription.addStyleName("form-help"); layout.add(mvDescription); } if (mv.get("error") != null && !"".equals(mv.get("error").trim())) { Label errorLabel = new Label(mv.get("error")); errorLabel.addStyleName("form-label-error"); layout.add(errorLabel); mvDate.addStyleName("isWrong"); } panel.add(layout); } private static void addSeparator(FlowPanel panel, final FlowPanel layout, final MetadataValue mv) { Label mvLabel = new Label(getFieldLabel(mv)); layout.add(mvLabel); // Description String description = mv.get("description"); if (description != null && description.length() > 0) { Label mvDescription = new Label(description); mvDescription.addStyleName("form-help"); layout.add(mvDescription); } panel.add(layout); } public static List<String> validate(Set<MetadataValue> values, FlowPanel extra) { List<String> errors = new ArrayList<>(); if (values != null) { for (MetadataValue mv : values) { String value = mv.get("value"); boolean mandatory = (mv.get("mandatory") != null && "true".equalsIgnoreCase(mv.get("mandatory"))) ? true : false; if (mandatory && (value == null || "".equals(value.trim()))) { String labels = mv.get("l"); errors.add(messages.isAMandatoryField(labels)); mv.set("error", messages.mandatoryField()); } else { mv.set("error", null); } } } extra.clear(); create(extra, values, true); return errors; } }