Java tutorial
/* * Copyright (C) 2013 University of Washington * * 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 org.opendatakit.aggregate.client.table; import java.util.ArrayList; import org.opendatakit.aggregate.client.AggregateSubTabBase; import org.opendatakit.aggregate.client.AggregateUI; import org.opendatakit.aggregate.client.OdkTablesManageTableFilesSubTab; import org.opendatakit.aggregate.client.SecureGWT; import org.opendatakit.aggregate.client.exception.EntityNotFoundExceptionClient; import org.opendatakit.aggregate.client.odktables.FileSummaryClient; import org.opendatakit.aggregate.client.odktables.TableContentsForFilesClient; import org.opendatakit.aggregate.client.odktables.TableEntryClient; import org.opendatakit.aggregate.client.widgets.OdkTablesDeleteTableFileButton; import org.opendatakit.aggregate.constants.common.SubTabs; import org.opendatakit.common.security.common.GrantedAuthorityName; import com.google.gwt.user.client.rpc.AsyncCallback; import com.google.gwt.user.client.ui.Anchor; import com.google.gwt.user.client.ui.FlexTable; import com.google.gwt.user.client.ui.HTML; import com.google.gwt.user.client.ui.Widget; /** * Displays the entries in the DbTableFileInfo table that pertain to a specific * table. * * @author sudar.sam@gmail.com * */ public class OdkTablesViewTableFileInfo extends FlexTable { // the table whose info we are currently displaying. private TableEntryClient currentTable; // that table's info rows private ArrayList<FileSummaryClient> fileSummaries; private static final int DELETE_COLUMN = 0; // this is the heading for the delete row button. private static final String DELETE_HEADING = "Delete"; private static final int ODK_CLIENT_VERSION_COLUMN = 1; private static final String ODK_CLIENT_VERSION_HEADING = "Client Version"; private static final int FILENAME_COLUMN = 2; private static final String FILENAME_HEADING = "Filename"; private static final int CONTENT_LENGTH_COLUMN = 3; private static final String CONTENT_LENGTH_HEADING = "Size"; private static final int CONTENT_TYPE_COLUMN = 4; private static final String CONTENT_TYPE_HEADING = "Content Type"; private static final int DOWNLOAD_COLUMN = 5; private static final String DOWNLOAD_HEADING = "Download"; private static final int numColumns = 6; // this is just the tab that opened the table private AggregateSubTabBase basePanel; // the message to display when there are no rows in the table private static String NO_ROWS_MESSAGE = "There are no rows to display."; /** * This is the constructor to call when there has not been a table selected. * Should this even exist? */ public OdkTablesViewTableFileInfo(AggregateSubTabBase tableSubTab) { setColumnHeadings(); // add styling addStyleName("dataTable"); getElement().setId("form_management_table"); this.basePanel = tableSubTab; // no current table. this.currentTable = null; } public OdkTablesViewTableFileInfo(AggregateSubTabBase tableSubTab, TableEntryClient table) { this(tableSubTab); updateDisplay(table); this.currentTable = table; } /** * This updates the display to show the contents of the table. */ public void updateDisplay(TableEntryClient table) { @SuppressWarnings("unused") TableEntryClient oldTable = this.currentTable; this.currentTable = table; if (table == null) { this.removeAllRows(); } else { /*** update the data ***/ updateData(table); } } public void updateData(TableEntryClient table) { // set up the callback object AsyncCallback<TableContentsForFilesClient> getDataCallback = new AsyncCallback<TableContentsForFilesClient>() { @Override public void onFailure(Throwable caught) { if (caught instanceof EntityNotFoundExceptionClient) { // if this happens it is PROBABLY, but not necessarily, because // we've deleted the table. // TODO ensure the correct exception makes it here ((OdkTablesManageTableFilesSubTab) AggregateUI.getUI().getSubTab(SubTabs.MANAGE_TABLE_ID_FILES)) .setTabToDislpayZero(); } else { AggregateUI.getUI().reportError(caught); } } @Override public void onSuccess(TableContentsForFilesClient tcc) { removeAllRows(); setColumnHeadings(); // setColumnHeadings(columnNames); fileSummaries = tcc.files; setRows(); // AggregateUI.getUI().getTimer().refreshNow(); } }; if (AggregateUI.getUI().getUserInfo().getGrantedAuthorities() .contains(GrantedAuthorityName.ROLE_SYNCHRONIZE_TABLES)) { SecureGWT.getServerDataService().getTableFileInfoContents(table.getTableId(), getDataCallback); } } private void setColumnHeadings() { // create the table headers. setText(0, DELETE_COLUMN, DELETE_HEADING); setText(0, ODK_CLIENT_VERSION_COLUMN, ODK_CLIENT_VERSION_HEADING); setText(0, FILENAME_COLUMN, FILENAME_HEADING); setText(0, CONTENT_LENGTH_COLUMN, CONTENT_LENGTH_HEADING); setText(0, CONTENT_TYPE_COLUMN, CONTENT_TYPE_HEADING); setText(0, DOWNLOAD_COLUMN, DOWNLOAD_HEADING); getRowFormatter().addStyleName(0, "titleBar"); } /* * This will set the row values in the listbox. */ private void setRows() { int start = 1; // b/c the 0 row is the headings. int currentRow = start; // Window.alert(Integer.toString(rows.size())); // if there are no columns, then we only want to display the no data // message. // otherwise check if there are no rows. if (fileSummaries.size() == 0) { setWidget(currentRow, 0, new HTML(NO_ROWS_MESSAGE)); // make the display fill all the columns you have. this is the total // number of // user-defined columns +1 for the delete column. this.getFlexCellFormatter().setColSpan(1, 0, numColumns); } else { // there are rows--display them. for (int j = 0; j < fileSummaries.size(); j++) { FileSummaryClient sum = fileSummaries.get(j); OdkTablesDeleteTableFileButton deleteButton = new OdkTablesDeleteTableFileButton(this.basePanel, sum.getOdkClientVersion(), currentTable.getTableId(), sum.getFilename()); if (!AggregateUI.getUI().getUserInfo().getGrantedAuthorities() .contains(GrantedAuthorityName.ROLE_ADMINISTER_TABLES)) { deleteButton.setEnabled(false); } setWidget(currentRow, DELETE_COLUMN, deleteButton); setText(currentRow, ODK_CLIENT_VERSION_COLUMN, sum.getOdkClientVersion()); setText(currentRow, FILENAME_COLUMN, sum.getFilename()); getFlexCellFormatter().setStyleName(currentRow, FILENAME_COLUMN, "dataLeft"); setText(currentRow, CONTENT_LENGTH_COLUMN, sum.getContentLength().toString()); getFlexCellFormatter().setStyleName(currentRow, CONTENT_LENGTH_COLUMN, "dataRight"); setText(currentRow, CONTENT_TYPE_COLUMN, sum.getContentType()); Widget downloadCol; if (sum.getDownloadUrl() != null) { Anchor downloadLink = new Anchor(); downloadLink.setText("Get"); downloadLink.setHref(sum.getDownloadUrl()); downloadCol = downloadLink; } else { downloadCol = new HTML(""); } setWidget(currentRow, DOWNLOAD_COLUMN, downloadCol); if (currentRow % 2 == 0) { getRowFormatter().addStyleName(currentRow, "evenTableRow"); } currentRow++; } while (getRowCount() > currentRow) { removeRow(getRowCount() - 1); } } } }