Java tutorial
/* * #! * Ontopoly Editor * #- * Copyright (C) 2001 - 2013 The Ontopia Project * #- * 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 ontopoly.pages; import java.io.OutputStream; import java.io.OutputStreamWriter; import java.io.UnsupportedEncodingException; import java.util.Arrays; import java.util.List; import net.ontopia.utils.OntopiaRuntimeException; import ontopoly.components.AjaxOntopolyTextField; import ontopoly.components.TitleHelpPanel; import ontopoly.model.TopicMap; import ontopoly.models.HelpLinkResourceModel; import ontopoly.utils.ExportUtils; import org.apache.wicket.PageParameters; import org.apache.wicket.ajax.AjaxRequestTarget; import org.apache.wicket.ajax.form.AjaxFormChoiceComponentUpdatingBehavior; import org.apache.wicket.behavior.SimpleAttributeModifier; import org.apache.wicket.markup.html.WebResource; import org.apache.wicket.markup.html.form.Form; import org.apache.wicket.markup.html.form.IChoiceRenderer; import org.apache.wicket.markup.html.form.RadioChoice; import org.apache.wicket.markup.html.link.ResourceLink; import org.apache.wicket.model.PropertyModel; import org.apache.wicket.model.ResourceModel; import org.apache.wicket.protocol.http.WebResponse; import org.apache.wicket.util.resource.AbstractResourceStreamWriter; import org.apache.wicket.util.resource.IResourceStream; public class AdminPage extends OntopolyAbstractPage { String content; String syntax; String action; String filename; public AdminPage() { } public AdminPage(PageParameters parameters) { super(parameters); // Adding part containing title and help link createTitle(); final Form<Object> form = new Form<Object>("form"); form.setOutputMarkupId(true); add(form); // First column of radio buttons final List<String> contentCategories = Arrays.asList( new ResourceModel("AdminPage.export.entire.topic.map").getObject().toString(), new ResourceModel("AdminPage.export.topic.map.without.schema").getObject().toString(), new ResourceModel("AdminPage.export.only.schema").getObject().toString()); content = (String) contentCategories.get(0); RadioChoice<String> contentRadioChoice = new RadioChoice<String>("content", new PropertyModel<String>(this, "content"), contentCategories); contentRadioChoice.add(new AjaxFormChoiceComponentUpdatingBehavior() { @Override protected void onUpdate(AjaxRequestTarget target) { // no-op } }); form.add(contentRadioChoice); TopicMap topicMap = getTopicMap(); // Second column of radio buttons List<String> syntaxCategories = Arrays.asList("ltm", "xtm1", "xtm2", "xtm21", "rdf", "tmxml"); syntax = syntaxCategories.get(1); filename = topicMap.getId(); final AjaxOntopolyTextField fileNameTextField = new AjaxOntopolyTextField("fileNameTextField", new PropertyModel<String>(this, "filename")); RadioChoice<String> syntaxRadioChoice = new RadioChoice<String>("syntax", new PropertyModel<String>(this, "syntax"), syntaxCategories, new IChoiceRenderer<String>() { public Object getDisplayValue(String object) { return new ResourceModel("AdminPage.export.syntax." + object).getObject(); // "export.syntax.ltm", "export.syntax.xtm1", "export.syntax.xtm2", "export.syntax.rdf" ... } public String getIdValue(String object, int index) { return object; } }); syntaxRadioChoice.add(new AjaxFormChoiceComponentUpdatingBehavior() { @Override protected void onUpdate(AjaxRequestTarget target) { if (target != null) target.addComponent(form); } }); form.add(syntaxRadioChoice); // Third column of radio buttons List<String> actionCategories = Arrays.asList( new ResourceModel("AdminPage.export.download").getObject().toString(), new ResourceModel("AdminPage.export.view").getObject().toString()); action = actionCategories.get(0).toString(); RadioChoice<String> actionRadioChoice = new RadioChoice<String>("action", new PropertyModel<String>(this, "action"), actionCategories); form.add(actionRadioChoice); actionRadioChoice.add(new AjaxFormChoiceComponentUpdatingBehavior() { @Override protected void onUpdate(AjaxRequestTarget target) { if (target != null) { target.addComponent(form); } } }); form.add(fileNameTextField); WebResource export = new WebResource() { @Override public IResourceStream getResourceStream() { AbstractResourceStreamWriter abstractResourceStreamWriter = new AbstractResourceStreamWriter() { public void write(OutputStream output) { ExportUtils.Content contentchoice = ExportUtils.Content.ENTIRE_TOPIC_MAP; if (content.equals((String) contentCategories.get(1))) contentchoice = ExportUtils.Content.INSTANCES_ONLY; else if (content.equals((String) contentCategories.get(2))) contentchoice = ExportUtils.Content.SCHEMA_ONLY; try { ExportUtils.export(getTopicMap(), syntax, contentchoice, new OutputStreamWriter(output, "utf-8")); } catch (UnsupportedEncodingException e) { throw new OntopiaRuntimeException(e); } } public String getContentType() { return syntax.equalsIgnoreCase("ltm") ? "text/plain" : "text/xml"; } }; return abstractResourceStreamWriter; } @Override protected void setHeaders(WebResponse response) { super.setHeaders(response); if (action.equals(new ResourceModel("AdminPage.export.download").getObject().toString())) { response.setAttachmentHeader(fileNameTextField.getModel().getObject()); } } }; export.setCacheable(false); ResourceLink<Object> resourceLink = new ResourceLink<Object>("export", export); resourceLink.add(new SimpleAttributeModifier("value", new ResourceModel("AdminPage.export.button").getObject().toString())); form.add(resourceLink); // initialize parent components initParentComponents(); } protected static class Syntax { private final String id; Syntax(String id) { this.id = id; } public String getId() { return id; } } @Override protected int getMainMenuIndex() { return ADMIN_PAGE_INDEX_IN_MAINMENU; } private void createTitle() { add(new TitleHelpPanel("titlePartPanel", new ResourceModel("AdminPage.export.title"), new HelpLinkResourceModel("help.link.exportpage"))); } }