org.eclipse.egit.relengtools/src/org/eclipse/egit/internal/relengtools/TagPage.java - egit/egit-pde - Git at Google

 /*******************************************************************************
  * Copyright (c) 2000, 2010 IBM Corporation and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/epl-v10.html
  *
  * Contributors:
  *     IBM Corporation - initial API and implementation
  *******************************************************************************/
 package org.eclipse.egit.internal.relengtools;

 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Calendar;
 import java.util.List;

 import org.eclipse.core.runtime.IStatus;
 import org.eclipse.core.runtime.Status;
 import org.eclipse.jface.dialogs.IDialogSettings;
 import org.eclipse.jface.resource.ImageDescriptor;
 import org.eclipse.jface.wizard.WizardPage;
 import org.eclipse.swt.SWT;
 import org.eclipse.swt.events.SelectionAdapter;
 import org.eclipse.swt.events.SelectionEvent;
 import org.eclipse.swt.graphics.Font;
 import org.eclipse.swt.layout.GridData;
 import org.eclipse.swt.layout.GridLayout;
 import org.eclipse.swt.widgets.Button;
 import org.eclipse.swt.widgets.Combo;
 import org.eclipse.swt.widgets.Composite;
 import org.eclipse.swt.widgets.Event;
 import org.eclipse.swt.widgets.Group;
 import org.eclipse.swt.widgets.Label;
 import org.eclipse.swt.widgets.Listener;

 /**
  * This class extends
  * <code>WizardPage<code>. It allows user to enter a tag name and make some additional
  * options.
  */
 public class TagPage extends WizardPage {

 	private String tagString;

 	private Combo tagCombo;

 	private static final int COMBO_HISTORY_LENGTH = 5;

 	private final String DEFAULT_TAG_PREFIX = "v";

 	private Button moveButton;

 	private Button validateButton;

 	private Button compareButton;

 	private Button commitButton;

 	private boolean moveButtonSelected;

 	private boolean compareButtonSelected;

 	private boolean commitButtonSelected;

 	private boolean validateButtonSelected;

 	private boolean hasError;// for tag validation

 	private final IDialogSettings settings;

 	private final String TAG_KEY = Messages.getString("TagPage.1"); //$NON-NLS-1$

 	private final String COMPARE_BUTTON_KEY = Messages.getString("TagPage.2"); //$NON-NLS-1$

 	private final String COMMIT_BUTTON_KEY = Messages.getString("TagPage.3"); //$NON-NLS-1$

 	private final String MOVE_BUTTON_KEY = Messages.getString("TagPage.4"); //$NON-NLS-1$

 	private final String VALIDATE_BUTTON_KEY = Messages.getString("TagPage.5"); //$NON-NLS-1$

 	/**
 	 * @param pageName
 	 * @param title
 	 * @param titleImage
 	 */
 	public TagPage(String pageName, String title, IDialogSettings settings,
 			ImageDescriptor image) {
 		super(pageName, title, image);
 		this.settings = settings;
 	}

 	/*
 	 * (non-Javadoc)
 	 *
 	 * @see
 	 * org.eclipse.jface.dialogs.IDialogPage#createControl(org.eclipse.swt.widgets
 	 * .Composite)
 	 */
 	@Override
 	public void createControl(Composite parent) {
 		final Font font = parent.getFont();
 		final Composite composite = new Composite(parent, SWT.NONE);
 		composite.setLayout(new GridLayout());
 		final GridData data = new GridData(GridData.FILL_BOTH);
 		composite.setLayoutData(data);
 		composite.setFont(font);

 		final Label label = new Label(composite, SWT.HORIZONTAL);
 		label.setText(Messages.getString("TagPage.6")); //$NON-NLS-1$
 		label.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
 		label.setFont(font);

 		final Listener listener = new Listener() {
 			@Override
 			public void handleEvent(Event event) {
 				tagString = null;
 				modifyTag();
 			}
 		};

 		tagCombo = new Combo(composite, SWT.NONE);
 		tagCombo.addListener(SWT.Selection, listener);
 		tagCombo.addListener(SWT.Modify, listener);
 		tagCombo.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
 		tagCombo.setFont(font);

 		moveButton = new Button(composite, SWT.CHECK);
 		moveButton.setVisible(true);
 		moveButton.setText(Messages.getString("TagPage.7")); //$NON-NLS-1$
 		moveButton.addSelectionListener(new SelectionAdapter() {
 			@Override
 			public void widgetSelected(SelectionEvent e) {
 				moveButtonSelected = moveButton.getSelection();
 			}
 		});
 		moveButton.setFont(font);

 		validateButton = new Button(composite, SWT.CHECK);
 		validateButton.setText(Messages.getString("TagPage.8")); //$NON-NLS-1$
 		validateButton.addSelectionListener(new SelectionAdapter() {
 			@Override
 			public void widgetSelected(SelectionEvent e) {
 				validateButtonSelected = validateButton.getSelection();
 			}
 		});
 		validateButton.setFont(font);

 		final Group group = new Group(composite, SWT.LEFT);
 		group.setLayout(new GridLayout());
 		final GridData layoutData = new GridData(GridData.FILL,
 				GridData.CENTER, true, false);
 		group.setLayoutData(layoutData);
 		group.setFont(font);
 		group.setText(Messages.getString("TagPage.9")); //$NON-NLS-1$

 		compareButton = new Button(group, SWT.RADIO);
 		compareButton.setText(Messages.getString("TagPage.10")); //$NON-NLS-1$
 		compareButton.addSelectionListener(new SelectionAdapter() {
 			@Override
 			public void widgetSelected(SelectionEvent e) {
 				compareButtonSelected = compareButton.getSelection();
 				updateFinishStatus();
 			}
 		});
 		compareButton.setFont(font);

 		commitButton = new Button(group, SWT.RADIO);
 		commitButton.setText(Messages.getString("TagPage.11")); //$NON-NLS-1$
 		commitButton.setSelection(true);
 		commitButton.addSelectionListener(new SelectionAdapter() {
 			@Override
 			public void widgetSelected(SelectionEvent e) {
 				commitButtonSelected = commitButton.getSelection();
 			}
 		});
 		commitButton.setFont(font);

 		initializePage();
 		setControl(composite);

 	}

 	public String getTagString() {
 		return tagString;
 	}

 	/**
 	 * Validates tag name
 	 */
 	private void validateTag(String tag) {
 		String message = null;
 		hasError = false;
 		if (tag.length() == 0) {
 			hasError = true;
 		} else {
 			final IStatus status = Status.OK_STATUS;
 			if (!status.isOK()) {
 				message = status.getMessage();
 				hasError = true;
 			}
 		}
 		setErrorMessage(message);
 	}

 	public boolean isMoveButtonSelected() {
 		return moveButtonSelected;
 	}

 	public boolean compareButtonSelected() {
 		return compareButtonSelected;
 	}

 	public boolean commitButtonSelected() {
 		return commitButtonSelected;
 	}

 	private boolean isPageCompleted() {
 		return (!hasError);
 	}

 	public void saveSettings() {
 		String[] tags = settings.getArray(TAG_KEY);
 		if (tags == null)
 			tags = new String[0];
 		tags = addToTagList(tags, tagCombo.getText());
 		settings.put(TAG_KEY, tags);
 		settings.put(COMPARE_BUTTON_KEY, compareButtonSelected);
 		settings.put(COMMIT_BUTTON_KEY, commitButtonSelected);
 		settings.put(MOVE_BUTTON_KEY, moveButtonSelected);
 		settings.put(VALIDATE_BUTTON_KEY, validateButtonSelected);
 	}

 	private void readSettings() {
 		if (settings.get(COMPARE_BUTTON_KEY) != null) {
 			compareButton.setSelection(settings.getBoolean(COMPARE_BUTTON_KEY));
 			compareButtonSelected = settings.getBoolean(COMPARE_BUTTON_KEY);
 		} else {
 			compareButton.setSelection(true);
 			compareButtonSelected = true;
 		}
 		if (settings.get(COMMIT_BUTTON_KEY) != null) {
 			commitButton.setSelection(settings.getBoolean(COMMIT_BUTTON_KEY));
 			commitButtonSelected = settings.getBoolean(COMMIT_BUTTON_KEY);
 		} else {
 			commitButton.setSelection(false);
 			commitButtonSelected = false;
 		}
 		if (settings.get(MOVE_BUTTON_KEY) != null) {
 			moveButton.setSelection(settings.getBoolean(MOVE_BUTTON_KEY));
 			moveButtonSelected = settings.getBoolean(MOVE_BUTTON_KEY);
 		} else {
 			moveButton.setSelection(false);
 			moveButtonSelected = false;
 		}
 		if (settings.get(VALIDATE_BUTTON_KEY) != null) {
 			validateButton.setSelection(settings
 					.getBoolean(VALIDATE_BUTTON_KEY));
 			validateButtonSelected = settings.getBoolean(VALIDATE_BUTTON_KEY);
 		} else {
 			validateButton.setSelection(true);
 			validateButtonSelected = true;
 		}
 		// insert the tag template to the head of the list and avoid duplicated
 		// items.
 		if (settings.getArray(TAG_KEY) == null) {
 			tagCombo.add(getTagTemplate());
 		} else {
 			final String[] savedTags = settings.getArray(TAG_KEY);
 			if (savedTags != null && savedTags.length > 0) {
 				final String[] newTags = addToTagList(savedTags,
 						getTagTemplate());
 				for (int i = 0; i < newTags.length; i++) {
 					tagCombo.add(newTags[i]);
 				}
 			} else {
 				tagCombo.add(getTagTemplate());
 			}
 		}
 	}

 	private void initializePage() {
 		if (settings != null) {
 			readSettings();
 		} else {
 			commitButton.setSelection(false);
 			compareButton.setSelection(true);
 			validateButton.setSelection(true);
 			moveButton.setSelection(false);
 			commitButtonSelected = false;
 			compareButtonSelected = true;
 			moveButtonSelected = false;
 			validateButtonSelected = true;
 			tagCombo.add(getTagTemplate());
 		}
 		hasError = false;
 		setPageComplete(false);
 	}

 	private void modifyTag() {
 		tagString = tagCombo.getText();
 		validateTag(tagString);
 		setPageComplete(isPageCompleted());
 	}

 	// The default tag format is "vYYYYMMDD"
 	private String getTagTemplate() {
 		String tag = getTagPrefix();
 		final Calendar today = Calendar.getInstance();
 		tag += today.get(Calendar.YEAR);
 		final int month = today.get(Calendar.MONTH) + 1;
 		if (month < 10) {
 			tag += "0" + month; //$NON-NLS-1$
 		} else {
 			tag += month;
 		}
 		final int day = today.get(Calendar.DAY_OF_MONTH);
 		if (day < 10) {
 			tag += "0" + day;
 		} else {
 			tag += day;
 		}
 		return tag;
 	}

 	/*
 	 * (non-Javadoc)
 	 *
 	 * @see org.eclipse.jface.dialogs.IDialogPage#setVisible(boolean)
 	 */
 	@Override
 	public void setVisible(boolean visible) {
 		super.setVisible(visible);
 		final ReleaseWizard wizard = (ReleaseWizard) getWizard();
 		final boolean b = wizard.getProjectSelectionPage()
 				.isCompareButtonChecked();
 		if (visible && !b) {
 			// In case the wizard switches to this page from Project Selection
 			// Page and there are some projects have outgoing changes
 			wizard.updateSelectedProject();
 		}
 		tagCombo.setFocus();
 	}

 	public boolean isValidateButtonSelected() {
 		return validateButtonSelected;
 	}

 	private String[] addToTagList(String[] history, String newEntry) {
 		final ArrayList l = new ArrayList(Arrays.asList(history));
 		addToTagList(l, newEntry);
 		final String[] r = new String[l.size()];
 		l.toArray(r);
 		return r;
 	}

 	private void addToTagList(List history, String newEntry) {
 		history.remove(newEntry);
 		history.add(0, newEntry);
 		// since only one new item was added, we can be over the limit
 		// by at most one item
 		if (history.size() > COMBO_HISTORY_LENGTH)
 			history.remove(COMBO_HISTORY_LENGTH);
 	}

 	private String getTagPrefix() {
 		if (settings != null) {
 			if (settings.getArray(TAG_KEY) != null) {
 				final String[] tags = settings.getArray(TAG_KEY);
 				if (tags != null && tags.length > 0) {
 					final String s = parseFirstTag(tags[0]);
 					if (s != null)
 						return s;
 				}
 			}
 		}
 		return DEFAULT_TAG_PREFIX;
 	}

 	private String parseFirstTag(String s) {
 		if (s == null)
 			return null;
 		final int length = s.length();
 		if (length == 0 || !Character.isLetter(s.charAt(0)))
 			return null;
 		int i = 0;
 		for (i = 0; i < length; i++) {
 			if (Character.isDigit(s.charAt(i))) {
 				break;
 			}
 		}
 		return s.substring(0, i);
 	}

 	private void updateFinishStatus() {
 		((ReleaseWizard) getWizard()).getContainer().updateButtons();
 	}
 }
	/*******************************************************************************
	* Copyright (c) 2000, 2010 IBM Corporation and others.
	* All rights reserved. This program and the accompanying materials
	* are made available under the terms of the Eclipse Public License v1.0
	* which accompanies this distribution, and is available at
	* http://www.eclipse.org/legal/epl-v10.html
	*
	* Contributors:
	* IBM Corporation - initial API and implementation
	*******************************************************************************/
	package org.eclipse.egit.internal.relengtools;

	import java.util.ArrayList;
	import java.util.Arrays;
	import java.util.Calendar;
	import java.util.List;

	import org.eclipse.core.runtime.IStatus;
	import org.eclipse.core.runtime.Status;
	import org.eclipse.jface.dialogs.IDialogSettings;
	import org.eclipse.jface.resource.ImageDescriptor;
	import org.eclipse.jface.wizard.WizardPage;
	import org.eclipse.swt.SWT;
	import org.eclipse.swt.events.SelectionAdapter;
	import org.eclipse.swt.events.SelectionEvent;
	import org.eclipse.swt.graphics.Font;
	import org.eclipse.swt.layout.GridData;
	import org.eclipse.swt.layout.GridLayout;
	import org.eclipse.swt.widgets.Button;
	import org.eclipse.swt.widgets.Combo;
	import org.eclipse.swt.widgets.Composite;
	import org.eclipse.swt.widgets.Event;
	import org.eclipse.swt.widgets.Group;
	import org.eclipse.swt.widgets.Label;
	import org.eclipse.swt.widgets.Listener;

	/**
	* This class extends
	* <code>WizardPage<code>. It allows user to enter a tag name and make some additional
	* options.
	*/
	public class TagPage extends WizardPage {

	private String tagString;

	private Combo tagCombo;

	private static final int COMBO_HISTORY_LENGTH = 5;

	private final String DEFAULT_TAG_PREFIX = "v";

	private Button moveButton;

	private Button validateButton;

	private Button compareButton;

	private Button commitButton;

	private boolean moveButtonSelected;

	private boolean compareButtonSelected;

	private boolean commitButtonSelected;

	private boolean validateButtonSelected;

	private boolean hasError;// for tag validation

	private final IDialogSettings settings;

	private final String TAG_KEY = Messages.getString("TagPage.1"); //$NON-NLS-1$

	private final String COMPARE_BUTTON_KEY = Messages.getString("TagPage.2"); //$NON-NLS-1$

	private final String COMMIT_BUTTON_KEY = Messages.getString("TagPage.3"); //$NON-NLS-1$

	private final String MOVE_BUTTON_KEY = Messages.getString("TagPage.4"); //$NON-NLS-1$

	private final String VALIDATE_BUTTON_KEY = Messages.getString("TagPage.5"); //$NON-NLS-1$

	/**
	* @param pageName
	* @param title
	* @param titleImage
	*/
	public TagPage(String pageName, String title, IDialogSettings settings,
	ImageDescriptor image) {
	super(pageName, title, image);
	this.settings = settings;
	}

	/*
	* (non-Javadoc)
	*
	* @see
	* org.eclipse.jface.dialogs.IDialogPage#createControl(org.eclipse.swt.widgets
	* .Composite)
	*/
	@Override
	public void createControl(Composite parent) {
	final Font font = parent.getFont();
	final Composite composite = new Composite(parent, SWT.NONE);
	composite.setLayout(new GridLayout());
	final GridData data = new GridData(GridData.FILL_BOTH);
	composite.setLayoutData(data);
	composite.setFont(font);

	final Label label = new Label(composite, SWT.HORIZONTAL);
	label.setText(Messages.getString("TagPage.6")); //$NON-NLS-1$
	label.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
	label.setFont(font);

	final Listener listener = new Listener() {
	@Override
	public void handleEvent(Event event) {
	tagString = null;
	modifyTag();
	}
	};

	tagCombo = new Combo(composite, SWT.NONE);
	tagCombo.addListener(SWT.Selection, listener);
	tagCombo.addListener(SWT.Modify, listener);
	tagCombo.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
	tagCombo.setFont(font);

	moveButton = new Button(composite, SWT.CHECK);
	moveButton.setVisible(true);
	moveButton.setText(Messages.getString("TagPage.7")); //$NON-NLS-1$
	moveButton.addSelectionListener(new SelectionAdapter() {
	@Override
	public void widgetSelected(SelectionEvent e) {
	moveButtonSelected = moveButton.getSelection();
	}
	});
	moveButton.setFont(font);

	validateButton = new Button(composite, SWT.CHECK);
	validateButton.setText(Messages.getString("TagPage.8")); //$NON-NLS-1$
	validateButton.addSelectionListener(new SelectionAdapter() {
	@Override
	public void widgetSelected(SelectionEvent e) {
	validateButtonSelected = validateButton.getSelection();
	}
	});
	validateButton.setFont(font);

	final Group group = new Group(composite, SWT.LEFT);
	group.setLayout(new GridLayout());
	final GridData layoutData = new GridData(GridData.FILL,
	GridData.CENTER, true, false);
	group.setLayoutData(layoutData);
	group.setFont(font);
	group.setText(Messages.getString("TagPage.9")); //$NON-NLS-1$

	compareButton = new Button(group, SWT.RADIO);
	compareButton.setText(Messages.getString("TagPage.10")); //$NON-NLS-1$
	compareButton.addSelectionListener(new SelectionAdapter() {
	@Override
	public void widgetSelected(SelectionEvent e) {
	compareButtonSelected = compareButton.getSelection();
	updateFinishStatus();
	}
	});
	compareButton.setFont(font);

	commitButton = new Button(group, SWT.RADIO);
	commitButton.setText(Messages.getString("TagPage.11")); //$NON-NLS-1$
	commitButton.setSelection(true);
	commitButton.addSelectionListener(new SelectionAdapter() {
	@Override
	public void widgetSelected(SelectionEvent e) {
	commitButtonSelected = commitButton.getSelection();
	}
	});
	commitButton.setFont(font);

	initializePage();
	setControl(composite);

	}

	public String getTagString() {
	return tagString;
	}

	/**
	* Validates tag name
	*/
	private void validateTag(String tag) {
	String message = null;
	hasError = false;
	if (tag.length() == 0) {
	hasError = true;
	} else {
	final IStatus status = Status.OK_STATUS;
	if (!status.isOK()) {
	message = status.getMessage();
	hasError = true;
	}
	}
	setErrorMessage(message);
	}

	public boolean isMoveButtonSelected() {
	return moveButtonSelected;
	}

	public boolean compareButtonSelected() {
	return compareButtonSelected;
	}

	public boolean commitButtonSelected() {
	return commitButtonSelected;
	}

	private boolean isPageCompleted() {
	return (!hasError);
	}

	public void saveSettings() {
	String[] tags = settings.getArray(TAG_KEY);
	if (tags == null)
	tags = new String[0];
	tags = addToTagList(tags, tagCombo.getText());
	settings.put(TAG_KEY, tags);
	settings.put(COMPARE_BUTTON_KEY, compareButtonSelected);
	settings.put(COMMIT_BUTTON_KEY, commitButtonSelected);
	settings.put(MOVE_BUTTON_KEY, moveButtonSelected);
	settings.put(VALIDATE_BUTTON_KEY, validateButtonSelected);
	}

	private void readSettings() {
	if (settings.get(COMPARE_BUTTON_KEY) != null) {
	compareButton.setSelection(settings.getBoolean(COMPARE_BUTTON_KEY));
	compareButtonSelected = settings.getBoolean(COMPARE_BUTTON_KEY);
	} else {
	compareButton.setSelection(true);
	compareButtonSelected = true;
	}
	if (settings.get(COMMIT_BUTTON_KEY) != null) {
	commitButton.setSelection(settings.getBoolean(COMMIT_BUTTON_KEY));
	commitButtonSelected = settings.getBoolean(COMMIT_BUTTON_KEY);
	} else {
	commitButton.setSelection(false);
	commitButtonSelected = false;
	}
	if (settings.get(MOVE_BUTTON_KEY) != null) {
	moveButton.setSelection(settings.getBoolean(MOVE_BUTTON_KEY));
	moveButtonSelected = settings.getBoolean(MOVE_BUTTON_KEY);
	} else {
	moveButton.setSelection(false);
	moveButtonSelected = false;
	}
	if (settings.get(VALIDATE_BUTTON_KEY) != null) {
	validateButton.setSelection(settings
	.getBoolean(VALIDATE_BUTTON_KEY));
	validateButtonSelected = settings.getBoolean(VALIDATE_BUTTON_KEY);
	} else {
	validateButton.setSelection(true);
	validateButtonSelected = true;
	}
	// insert the tag template to the head of the list and avoid duplicated
	// items.
	if (settings.getArray(TAG_KEY) == null) {
	tagCombo.add(getTagTemplate());
	} else {
	final String[] savedTags = settings.getArray(TAG_KEY);
	if (savedTags != null && savedTags.length > 0) {
	final String[] newTags = addToTagList(savedTags,
	getTagTemplate());
	for (int i = 0; i < newTags.length; i++) {
	tagCombo.add(newTags[i]);
	}
	} else {
	tagCombo.add(getTagTemplate());
	}
	}
	}

	private void initializePage() {
	if (settings != null) {
	readSettings();
	} else {
	commitButton.setSelection(false);
	compareButton.setSelection(true);
	validateButton.setSelection(true);
	moveButton.setSelection(false);
	commitButtonSelected = false;
	compareButtonSelected = true;
	moveButtonSelected = false;
	validateButtonSelected = true;
	tagCombo.add(getTagTemplate());
	}
	hasError = false;
	setPageComplete(false);
	}

	private void modifyTag() {
	tagString = tagCombo.getText();
	validateTag(tagString);
	setPageComplete(isPageCompleted());
	}

	// The default tag format is "vYYYYMMDD"
	private String getTagTemplate() {
	String tag = getTagPrefix();
	final Calendar today = Calendar.getInstance();
	tag += today.get(Calendar.YEAR);
	final int month = today.get(Calendar.MONTH) + 1;
	if (month < 10) {
	tag += "0" + month; //$NON-NLS-1$
	} else {
	tag += month;
	}
	final int day = today.get(Calendar.DAY_OF_MONTH);
	if (day < 10) {
	tag += "0" + day;
	} else {
	tag += day;
	}
	return tag;
	}

	/*
	* (non-Javadoc)
	*
	* @see org.eclipse.jface.dialogs.IDialogPage#setVisible(boolean)
	*/
	@Override
	public void setVisible(boolean visible) {
	super.setVisible(visible);
	final ReleaseWizard wizard = (ReleaseWizard) getWizard();
	final boolean b = wizard.getProjectSelectionPage()
	.isCompareButtonChecked();
	if (visible && !b) {
	// In case the wizard switches to this page from Project Selection
	// Page and there are some projects have outgoing changes
	wizard.updateSelectedProject();
	}
	tagCombo.setFocus();
	}

	public boolean isValidateButtonSelected() {
	return validateButtonSelected;
	}

	private String[] addToTagList(String[] history, String newEntry) {
	final ArrayList l = new ArrayList(Arrays.asList(history));
	addToTagList(l, newEntry);
	final String[] r = new String[l.size()];
	l.toArray(r);
	return r;
	}

	private void addToTagList(List history, String newEntry) {
	history.remove(newEntry);
	history.add(0, newEntry);
	// since only one new item was added, we can be over the limit
	// by at most one item
	if (history.size() > COMBO_HISTORY_LENGTH)
	history.remove(COMBO_HISTORY_LENGTH);
	}

	private String getTagPrefix() {
	if (settings != null) {
	if (settings.getArray(TAG_KEY) != null) {
	final String[] tags = settings.getArray(TAG_KEY);
	if (tags != null && tags.length > 0) {
	final String s = parseFirstTag(tags[0]);
	if (s != null)
	return s;
	}
	}
	}
	return DEFAULT_TAG_PREFIX;
	}

	private String parseFirstTag(String s) {
	if (s == null)
	return null;
	final int length = s.length();
	if (length == 0 \|\| !Character.isLetter(s.charAt(0)))
	return null;
	int i = 0;
	for (i = 0; i < length; i++) {
	if (Character.isDigit(s.charAt(i))) {
	break;
	}
	}
	return s.substring(0, i);
	}

	private void updateFinishStatus() {
	((ReleaseWizard) getWizard()).getContainer().updateButtons();
	}
	}