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.browse; import java.util.ArrayList; import java.util.Collections; import java.util.Comparator; import java.util.Date; import java.util.List; import org.roda.core.data.common.RodaConstants; import org.roda.wui.client.browse.bundle.BinaryVersionBundle; import org.roda.wui.client.browse.bundle.DescriptiveMetadataVersionsBundle; import org.roda.wui.client.common.UserLogin; import org.roda.wui.client.common.utils.AsyncCallbackUtils; import org.roda.wui.client.common.utils.JavascriptUtils; import org.roda.wui.common.client.HistoryResolver; import org.roda.wui.common.client.tools.HistoryUtils; import org.roda.wui.common.client.tools.ListUtils; import org.roda.wui.common.client.tools.RestErrorOverlayType; import org.roda.wui.common.client.tools.RestUtils; import org.roda.wui.common.client.widgets.Toast; import com.google.gwt.core.client.GWT; import com.google.gwt.core.client.JsonUtils; import com.google.gwt.dom.client.Element; import com.google.gwt.event.dom.client.ChangeEvent; import com.google.gwt.event.dom.client.ChangeHandler; import com.google.gwt.event.dom.client.ClickEvent; import com.google.gwt.http.client.Request; import com.google.gwt.http.client.RequestBuilder; import com.google.gwt.http.client.RequestCallback; import com.google.gwt.http.client.RequestException; import com.google.gwt.http.client.Response; import com.google.gwt.i18n.client.LocaleInfo; import com.google.gwt.safehtml.shared.SafeHtml; import com.google.gwt.safehtml.shared.SafeHtmlBuilder; import com.google.gwt.safehtml.shared.SafeHtmlUtils; import com.google.gwt.safehtml.shared.SafeUri; import com.google.gwt.uibinder.client.UiBinder; import com.google.gwt.uibinder.client.UiField; import com.google.gwt.uibinder.client.UiHandler; import com.google.gwt.user.client.rpc.AsyncCallback; import com.google.gwt.user.client.ui.Button; import com.google.gwt.user.client.ui.Composite; import com.google.gwt.user.client.ui.FocusPanel; import com.google.gwt.user.client.ui.HTML; import com.google.gwt.user.client.ui.Label; import com.google.gwt.user.client.ui.ListBox; import com.google.gwt.user.client.ui.Widget; import config.i18n.client.ClientMessages; /** * @author Luis Faria * */ public class DescriptiveMetadataHistory extends Composite { public static final HistoryResolver RESOLVER = new HistoryResolver() { @Override public void resolve(List<String> historyTokens, final AsyncCallback<Widget> callback) { if (historyTokens.size() == 2 || historyTokens.size() == 3) { final String aipId = historyTokens.get(0); final String representationId = historyTokens.size() == 3 ? historyTokens.get(1) : null; final String descriptiveMetadataId = new HTML(historyTokens.get(historyTokens.size() - 1)) .getText(); BrowserService.Util.getInstance().retrieveDescriptiveMetadataVersionsBundle(aipId, representationId, descriptiveMetadataId, LocaleInfo.getCurrentLocale().getLocaleName(), new AsyncCallback<DescriptiveMetadataVersionsBundle>() { @Override public void onFailure(Throwable caught) { AsyncCallbackUtils.defaultFailureTreatment(caught); } @Override public void onSuccess(DescriptiveMetadataVersionsBundle bundle) { DescriptiveMetadataHistory widget = new DescriptiveMetadataHistory(aipId, representationId, descriptiveMetadataId, bundle); callback.onSuccess(widget); } }); } else { HistoryUtils.newHistory(BrowseAIP.RESOLVER); callback.onSuccess(null); } } @Override public void isCurrentUserPermitted(AsyncCallback<Boolean> callback) { // TODO check for browse metadata history permission UserLogin.getInstance().checkRoles(new HistoryResolver[] { BrowseAIP.RESOLVER }, false, callback); } @Override public List<String> getHistoryPath() { return ListUtils.concat(BrowseAIP.RESOLVER.getHistoryPath(), getHistoryToken()); } @Override public String getHistoryToken() { return "history"; } }; interface MyUiBinder extends UiBinder<Widget, DescriptiveMetadataHistory> { } private static MyUiBinder uiBinder = GWT.create(MyUiBinder.class); private static final ClientMessages messages = GWT.create(ClientMessages.class); private final String aipId; private final String representationId; private final String descriptiveMetadataId; private DescriptiveMetadataVersionsBundle bundle; private boolean inHTML = true; private String selectedVersion = null; @UiField ListBox list; @UiField Label descriptiveMetadataType; @UiField HTML preview; @UiField FocusPanel showXml; @UiField Button buttonRevert; @UiField Button buttonRemove; @UiField Button buttonCancel; /** * Create a new panel to edit a user * * @param user * the user to edit */ public DescriptiveMetadataHistory(final String aipId, final String representationId, final String descriptiveMetadataId, final DescriptiveMetadataVersionsBundle bundle) { this.aipId = aipId; this.representationId = representationId; this.descriptiveMetadataId = descriptiveMetadataId; this.bundle = bundle; initWidget(uiBinder.createAndBindUi(this)); init(); list.addChangeHandler(new ChangeHandler() { @Override public void onChange(ChangeEvent event) { String versionKey = list.getSelectedValue(); selectedVersion = versionKey; updatePreview(); } }); Element firstElement = showXml.getElement().getFirstChildElement(); if ("input".equalsIgnoreCase(firstElement.getTagName())) { firstElement.setAttribute("title", "browse input"); } } @Override protected void onLoad() { super.onLoad(); JavascriptUtils.stickSidebar(); } private void init() { // sort List<BinaryVersionBundle> versionList = new ArrayList<>(bundle.getVersions()); Collections.sort(versionList, new Comparator<BinaryVersionBundle>() { @Override public int compare(BinaryVersionBundle v1, BinaryVersionBundle v2) { return (int) (v2.getCreatedDate().getTime() - v1.getCreatedDate().getTime()); } }); // create list layout for (BinaryVersionBundle version : versionList) { String versionKey = version.getId(); String message = messages.versionAction(version.getProperties().get(RodaConstants.VERSION_ACTION)); Date createdDate = version.getCreatedDate(); if (version.getProperties().get(RodaConstants.VERSION_USER) != null) { message = messages.versionActionBy(message, version.getProperties().get(RodaConstants.VERSION_USER)); } list.addItem(messages.descriptiveMetadataHistoryLabel(message, createdDate), versionKey); } descriptiveMetadataType.setText(bundle.getDescriptiveMetadata().getLabel()); if (!versionList.isEmpty()) { list.setSelectedIndex(0); selectedVersion = versionList.get(0).getId(); updatePreview(); } } protected void updatePreview() { getDescriptiveMetadata(aipId, representationId, descriptiveMetadataId, selectedVersion, inHTML, new AsyncCallback<SafeHtml>() { @Override public void onFailure(Throwable caught) { AsyncCallbackUtils.defaultFailureTreatment(caught); } @Override public void onSuccess(SafeHtml html) { preview.setHTML(html); if (inHTML) { preview.removeStyleName("code-pre"); } else { preview.addStyleName("code-pre"); JavascriptUtils.runHighlighterOn(preview.getElement()); } } }); } private void getDescriptiveMetadata(final String aipId, final String representationId, final String descId, final String versionKey, final boolean inHTML, final AsyncCallback<SafeHtml> callback) { SafeUri uri; if (inHTML) { if (representationId != null) { uri = RestUtils.createRepresentationDescriptiveMetadataHTMLUri(aipId, representationId, descId, versionKey); } else { uri = RestUtils.createDescriptiveMetadataHTMLUri(aipId, descId, versionKey); } } else { if (representationId != null) { uri = RestUtils.createRepresentationDescriptiveMetadataDownloadUri(aipId, representationId, descId, versionKey); } else { uri = RestUtils.createDescriptiveMetadataDownloadUri(aipId, descId, versionKey); } } RequestBuilder requestBuilder = new RequestBuilder(RequestBuilder.GET, uri.asString()); requestBuilder.setHeader("Authorization", "Custom"); try { requestBuilder.sendRequest(null, new RequestCallback() { @Override public void onResponseReceived(Request request, Response response) { if (200 == response.getStatusCode()) { String text = response.getText(); SafeHtmlBuilder b = new SafeHtmlBuilder(); if (inHTML) { b.append(SafeHtmlUtils.fromTrustedString(text)); } else { b.append(SafeHtmlUtils.fromString(text)); } SafeHtml safeHtml = b.toSafeHtml(); callback.onSuccess(safeHtml); } else { String text = response.getText(); String message; try { RestErrorOverlayType error = (RestErrorOverlayType) JsonUtils.safeEval(text); message = error.getMessage(); } catch (IllegalArgumentException e) { message = text; } SafeHtmlBuilder b = new SafeHtmlBuilder(); // error message b.append(SafeHtmlUtils.fromSafeConstant("<div class='error'>")); b.append(messages.descriptiveMetadataTransformToHTMLError()); b.append(SafeHtmlUtils.fromSafeConstant("<pre><code>")); b.append(SafeHtmlUtils.fromString(message)); b.append(SafeHtmlUtils.fromSafeConstant("</core></pre>")); b.append(SafeHtmlUtils.fromSafeConstant("</div>")); callback.onSuccess(b.toSafeHtml()); } } @Override public void onError(Request request, Throwable exception) { callback.onFailure(exception); } }); } catch ( RequestException e) { callback.onFailure(e); } } public boolean isInHTML() { return inHTML; } public void setInHTML(boolean inHTML) { this.inHTML = inHTML; if (inHTML) { showXml.removeStyleName("toolbarLink-selected"); } else { showXml.addStyleName("toolbarLink-selected"); } } @UiHandler("showXml") void buttonShowXmlHandler(ClickEvent e) { setInHTML(!isInHTML()); updatePreview(); } @UiHandler("buttonRevert") void buttonRevertHandler(ClickEvent e) { BrowserService.Util.getInstance().revertDescriptiveMetadataVersion(aipId, representationId, descriptiveMetadataId, selectedVersion, new AsyncCallback<Void>() { @Override public void onFailure(Throwable caught) { AsyncCallbackUtils.defaultFailureTreatment(caught); } @Override public void onSuccess(Void result) { Toast.showInfo(messages.dialogDone(), messages.versionReverted()); HistoryUtils.newHistory(BrowseAIP.RESOLVER, aipId); } }); } @UiHandler("buttonRemove") void buttonRemoveHandler(ClickEvent e) { BrowserService.Util.getInstance().deleteDescriptiveMetadataVersion(aipId, representationId, descriptiveMetadataId, selectedVersion, new AsyncCallback<Void>() { @Override public void onFailure(Throwable caught) { AsyncCallbackUtils.defaultFailureTreatment(caught); } @Override public void onSuccess(Void result) { Toast.showInfo(messages.dialogDone(), messages.versionDeleted()); refresh(); if (bundle.getVersions().isEmpty()) { HistoryUtils.newHistory(BrowseAIP.RESOLVER, aipId); } } }); } protected void refresh() { BrowserService.Util.getInstance().retrieveDescriptiveMetadataVersionsBundle(aipId, representationId, descriptiveMetadataId, LocaleInfo.getCurrentLocale().getLocaleName(), new AsyncCallback<DescriptiveMetadataVersionsBundle>() { @Override public void onFailure(Throwable caught) { AsyncCallbackUtils.defaultFailureTreatment(caught); } @Override public void onSuccess(DescriptiveMetadataVersionsBundle bundle) { DescriptiveMetadataHistory.this.bundle = bundle; clean(); init(); } }); } protected void clean() { list.clear(); descriptiveMetadataType.setText(""); selectedVersion = null; preview.setHTML(""); } @UiHandler("buttonCancel") void buttonCancelHandler(ClickEvent e) { cancel(); } private void cancel() { HistoryUtils.newHistory(BrowseAIP.RESOLVER, aipId); } }