Java tutorial
/*! ****************************************************************************** * * Pentaho Data Integration * * Copyright (C) 2002-2018 by Hitachi Vantara : http://www.pentaho.com * ******************************************************************************* * * 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.pentaho.di.ui.trans.steps.setvariable; import java.util.ArrayList; import java.util.HashMap; import java.util.List; import java.util.Map; import java.util.Set; import org.eclipse.jface.dialogs.MessageDialog; import org.eclipse.jface.dialogs.MessageDialogWithToggle; import org.eclipse.swt.SWT; import org.eclipse.swt.events.ModifyEvent; import org.eclipse.swt.events.ModifyListener; import org.eclipse.swt.events.SelectionAdapter; import org.eclipse.swt.events.SelectionEvent; import org.eclipse.swt.events.ShellAdapter; import org.eclipse.swt.events.ShellEvent; import org.eclipse.swt.layout.FormAttachment; import org.eclipse.swt.layout.FormData; import org.eclipse.swt.layout.FormLayout; import org.eclipse.swt.widgets.Button; import org.eclipse.swt.widgets.Display; import org.eclipse.swt.widgets.Event; import org.eclipse.swt.widgets.Label; import org.eclipse.swt.widgets.Listener; import org.eclipse.swt.widgets.Shell; import org.eclipse.swt.widgets.TableItem; import org.eclipse.swt.widgets.Text; import org.pentaho.di.core.Const; import org.pentaho.di.core.util.Utils; import org.pentaho.di.core.exception.KettleException; import org.pentaho.di.core.row.RowMetaInterface; import org.pentaho.di.core.row.ValueMetaInterface; import org.pentaho.di.i18n.BaseMessages; import org.pentaho.di.trans.TransMeta; import org.pentaho.di.trans.step.BaseStepMeta; import org.pentaho.di.trans.step.StepDialogInterface; import org.pentaho.di.trans.step.StepMeta; import org.pentaho.di.trans.steps.setvariable.SetVariableMeta; import org.pentaho.di.ui.core.dialog.ErrorDialog; import org.pentaho.di.ui.core.gui.GUIResource; import org.pentaho.di.ui.core.widget.ColumnInfo; import org.pentaho.di.ui.core.widget.TableView; import org.pentaho.di.ui.trans.step.BaseStepDialog; import org.pentaho.di.ui.trans.step.ComponentSelectionListener; import org.pentaho.di.ui.trans.step.TableItemInsertListener; public class SetVariableDialog extends BaseStepDialog implements StepDialogInterface { private static Class<?> PKG = SetVariableMeta.class; // for i18n purposes, needed by Translator2!! public static final String STRING_USAGE_WARNING_PARAMETER = "SetVariableUsageWarning"; private Label wlStepname; private Text wStepname; private FormData fdlStepname, fdStepname; private Label wlFormat; private Button wFormat; private FormData fdlFormat, fdFormat; private Label wlFields; private TableView wFields; private FormData fdlFields, fdFields; private SetVariableMeta input; private Map<String, Integer> inputFields; private ColumnInfo[] colinf; public SetVariableDialog(Shell parent, Object in, TransMeta transMeta, String sname) { super(parent, (BaseStepMeta) in, transMeta, sname); input = (SetVariableMeta) in; inputFields = new HashMap<String, Integer>(); } public String open() { Shell parent = getParent(); Display display = parent.getDisplay(); shell = new Shell(parent, SWT.DIALOG_TRIM | SWT.RESIZE | SWT.MAX | SWT.MIN); props.setLook(shell); setShellImage(shell, input); ModifyListener lsMod = new ModifyListener() { public void modifyText(ModifyEvent e) { input.setChanged(); } }; changed = input.hasChanged(); FormLayout formLayout = new FormLayout(); formLayout.marginWidth = Const.FORM_MARGIN; formLayout.marginHeight = Const.FORM_MARGIN; shell.setLayout(formLayout); shell.setText(BaseMessages.getString(PKG, "SetVariableDialog.DialogTitle")); int middle = props.getMiddlePct(); int margin = Const.MARGIN; // Stepname line wlStepname = new Label(shell, SWT.RIGHT); wlStepname.setText(BaseMessages.getString(PKG, "SetVariableDialog.Stepname.Label")); props.setLook(wlStepname); fdlStepname = new FormData(); fdlStepname.left = new FormAttachment(0, 0); fdlStepname.right = new FormAttachment(middle, -margin); fdlStepname.top = new FormAttachment(0, margin); wlStepname.setLayoutData(fdlStepname); wStepname = new Text(shell, SWT.SINGLE | SWT.LEFT | SWT.BORDER); props.setLook(wStepname); wStepname.addModifyListener(lsMod); fdStepname = new FormData(); fdStepname.left = new FormAttachment(middle, 0); fdStepname.top = new FormAttachment(0, margin); fdStepname.right = new FormAttachment(100, 0); wStepname.setLayoutData(fdStepname); wlFormat = new Label(shell, SWT.RIGHT); wlFormat.setText(BaseMessages.getString(PKG, "SetVariableDialog.Format.Label")); wlFormat.setToolTipText(BaseMessages.getString(PKG, "SetVariableDialog.Format.Tooltip")); props.setLook(wlFormat); fdlFormat = new FormData(); fdlFormat.left = new FormAttachment(0, 0); fdlFormat.right = new FormAttachment(middle, -margin); fdlFormat.top = new FormAttachment(wStepname, margin); wlFormat.setLayoutData(fdlFormat); wFormat = new Button(shell, SWT.CHECK); wFormat.setToolTipText(BaseMessages.getString(PKG, "SetVariableDialog.Format.Tooltip")); props.setLook(wFormat); fdFormat = new FormData(); fdFormat.left = new FormAttachment(middle, 0); fdFormat.top = new FormAttachment(wStepname, margin); wFormat.setLayoutData(fdFormat); wFormat.addSelectionListener(new ComponentSelectionListener(input)); wlFields = new Label(shell, SWT.NONE); wlFields.setText(BaseMessages.getString(PKG, "SetVariableDialog.Fields.Label")); props.setLook(wlFields); fdlFields = new FormData(); fdlFields.left = new FormAttachment(0, 0); fdlFields.top = new FormAttachment(wFormat, margin); wlFields.setLayoutData(fdlFields); final int FieldsRows = input.getFieldName().length; colinf = new ColumnInfo[4]; colinf[0] = new ColumnInfo(BaseMessages.getString(PKG, "SetVariableDialog.Fields.Column.FieldName"), ColumnInfo.COLUMN_TYPE_CCOMBO, new String[] { "" }, false); colinf[1] = new ColumnInfo(BaseMessages.getString(PKG, "SetVariableDialog.Fields.Column.VariableName"), ColumnInfo.COLUMN_TYPE_TEXT, false); colinf[2] = new ColumnInfo(BaseMessages.getString(PKG, "SetVariableDialog.Fields.Column.VariableType"), ColumnInfo.COLUMN_TYPE_CCOMBO, SetVariableMeta.getVariableTypeDescriptions(), false); colinf[3] = new ColumnInfo(BaseMessages.getString(PKG, "SetVariableDialog.Fields.Column.DefaultValue"), ColumnInfo.COLUMN_TYPE_TEXT, false); colinf[3].setUsingVariables(true); colinf[3].setToolTip(BaseMessages.getString(PKG, "SetVariableDialog.Fields.Column.DefaultValue.Tooltip")); wFields = new TableView(transMeta, shell, SWT.BORDER | SWT.FULL_SELECTION | SWT.MULTI, colinf, FieldsRows, lsMod, props); fdFields = new FormData(); fdFields.left = new FormAttachment(0, 0); fdFields.top = new FormAttachment(wlFields, margin); fdFields.right = new FormAttachment(100, 0); fdFields.bottom = new FormAttachment(100, -50); wFields.setLayoutData(fdFields); // // Search the fields in the background final Runnable runnable = new Runnable() { public void run() { StepMeta stepMeta = transMeta.findStep(stepname); if (stepMeta != null) { try { RowMetaInterface row = transMeta.getPrevStepFields(stepMeta); // Remember these fields... for (int i = 0; i < row.size(); i++) { inputFields.put(row.getValueMeta(i).getName(), Integer.valueOf(i)); } setComboBoxes(); } catch (KettleException e) { logError(BaseMessages.getString(PKG, "System.Dialog.GetFieldsFailed.Message")); } } } }; new Thread(runnable).start(); // Some buttons wOK = new Button(shell, SWT.PUSH); wOK.setText(BaseMessages.getString(PKG, "System.Button.OK")); wGet = new Button(shell, SWT.PUSH); wGet.setText(BaseMessages.getString(PKG, "System.Button.GetFields")); wCancel = new Button(shell, SWT.PUSH); wCancel.setText(BaseMessages.getString(PKG, "System.Button.Cancel")); setButtonPositions(new Button[] { wOK, wCancel, wGet }, margin, wFields); // Add listeners lsCancel = new Listener() { public void handleEvent(Event e) { cancel(); } }; lsGet = new Listener() { public void handleEvent(Event e) { get(); } }; lsOK = new Listener() { public void handleEvent(Event e) { ok(); } }; wCancel.addListener(SWT.Selection, lsCancel); wGet.addListener(SWT.Selection, lsGet); wOK.addListener(SWT.Selection, lsOK); lsDef = new SelectionAdapter() { public void widgetDefaultSelected(SelectionEvent e) { ok(); } }; wStepname.addSelectionListener(lsDef); // Detect X or ALT-F4 or something that kills this window... shell.addShellListener(new ShellAdapter() { public void shellClosed(ShellEvent e) { cancel(); } }); // Set the shell size, based upon previous time... setSize(); getData(); input.setChanged(changed); shell.open(); while (!shell.isDisposed()) { if (!display.readAndDispatch()) { display.sleep(); } } return stepname; } protected void setComboBoxes() { // Something was changed in the row. // final Map<String, Integer> fields = new HashMap<String, Integer>(); // Add the currentMeta fields... fields.putAll(inputFields); Set<String> keySet = fields.keySet(); List<String> entries = new ArrayList<String>(keySet); String[] fieldNames = entries.toArray(new String[entries.size()]); Const.sortStrings(fieldNames); colinf[0].setComboValues(fieldNames); } /** * Copy information from the meta-data input to the dialog fields. */ public void getData() { wStepname.setText(stepname); for (int i = 0; i < input.getFieldName().length; i++) { TableItem item = wFields.table.getItem(i); String src = input.getFieldName()[i]; String tgt = input.getVariableName()[i]; String typ = SetVariableMeta.getVariableTypeDescription(input.getVariableType()[i]); String tvv = input.getDefaultValue()[i]; if (src != null) { item.setText(1, src); } if (tgt != null) { item.setText(2, tgt); } if (typ != null) { item.setText(3, typ); } if (tvv != null) { item.setText(4, tvv); } } wFormat.setSelection(input.isUsingFormatting()); wFields.setRowNums(); wFields.optWidth(true); wStepname.selectAll(); wStepname.setFocus(); } private void cancel() { stepname = null; input.setChanged(changed); dispose(); } private void ok() { if (Utils.isEmpty(wStepname.getText())) { return; } stepname = wStepname.getText(); // return value int count = wFields.nrNonEmpty(); input.allocate(count); //CHECKSTYLE:Indentation:OFF for (int i = 0; i < count; i++) { TableItem item = wFields.getNonEmpty(i); input.getFieldName()[i] = item.getText(1); input.getVariableName()[i] = item.getText(2); input.getVariableType()[i] = SetVariableMeta.getVariableType(item.getText(3)); input.getDefaultValue()[i] = item.getText(4); } input.setUsingFormatting(wFormat.getSelection()); // Show a warning (optional) // if ("Y".equalsIgnoreCase(props.getCustomParameter(STRING_USAGE_WARNING_PARAMETER, "Y"))) { MessageDialogWithToggle md = new MessageDialogWithToggle(shell, BaseMessages.getString(PKG, "SetVariableDialog.UsageWarning.DialogTitle"), null, BaseMessages.getString(PKG, "SetVariableDialog.UsageWarning.DialogMessage", Const.CR) + Const.CR, MessageDialog.WARNING, new String[] { BaseMessages.getString(PKG, "SetVariableDialog.UsageWarning.Option1") }, 0, BaseMessages.getString(PKG, "SetVariableDialog.UsageWarning.Option2"), "N".equalsIgnoreCase(props.getCustomParameter(STRING_USAGE_WARNING_PARAMETER, "Y"))); MessageDialogWithToggle.setDefaultImage(GUIResource.getInstance().getImageSpoon()); md.open(); props.setCustomParameter(STRING_USAGE_WARNING_PARAMETER, md.getToggleState() ? "N" : "Y"); props.saveProps(); } dispose(); } private void get() { try { RowMetaInterface r = transMeta.getPrevStepFields(stepname); if (r != null && !r.isEmpty()) { BaseStepDialog.getFieldsFromPrevious(r, wFields, 1, new int[] { 1 }, new int[] {}, -1, -1, new TableItemInsertListener() { public boolean tableItemInserted(TableItem tableItem, ValueMetaInterface v) { tableItem.setText(2, v.getName().toUpperCase()); tableItem.setText(3, SetVariableMeta .getVariableTypeDescription(SetVariableMeta.VARIABLE_TYPE_ROOT_JOB)); return true; } }); } } catch (KettleException ke) { new ErrorDialog(shell, BaseMessages.getString(PKG, "SetVariableDialog.FailedToGetFields.DialogTitle"), BaseMessages.getString(PKG, "Set.FailedToGetFields.DialogMessage"), ke); } } }