Java tutorial
/******************************************************************************* * Copyright (c) 2004, 2010 BREDEX GmbH. * 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: * BREDEX GmbH - initial API and implementation and/or initial documentation *******************************************************************************/ package org.eclipse.jubula.client.ui.rcp.widgets; import java.util.List; import org.apache.commons.lang.StringUtils; import org.eclipse.jubula.client.core.model.IParamDescriptionPO; import org.eclipse.jubula.client.core.model.IParameterInterfacePO; import org.eclipse.jubula.client.core.utils.ParamValueConverter; import org.eclipse.jubula.client.core.utils.TokenError; import org.eclipse.jubula.client.ui.constants.Constants; import org.eclipse.jubula.client.ui.rcp.widgets.CheckedText.IValidator; import org.eclipse.jubula.client.ui.rcp.widgets.CheckedText.ValidationState; import org.eclipse.jubula.tools.constants.StringConstants; import org.eclipse.jubula.tools.messagehandling.MessageIDs; import org.eclipse.swt.events.VerifyEvent; import org.eclipse.swt.widgets.Control; import org.eclipse.swt.widgets.Text; /** * @author BREDEX GmbH * @created 01.11.2007 */ public class ParamValueValidator implements IValidator { /** node associated with parameter to validate */ private IParameterInterfacePO m_node; /** parameter description associated with value to validate */ private IParamDescriptionPO m_desc; /** is an empty text valid? */ private boolean m_emptyAllowed; /** * @param node * associated with parameter to validate * @param desc * parameter description associated with current edited value * @param emptyAllowed * is an empty text filed allowed? */ public ParamValueValidator(IParameterInterfacePO node, IParamDescriptionPO desc, boolean emptyAllowed) { m_node = node; m_desc = desc; m_emptyAllowed = emptyAllowed; } /** * Validate the new text. It is allowed to set members of the * VerifyEvent, i.e. e.text and e.doit. To hilight the text field * the ConvValidationState is used. Please be aware that the e.doit member * is also set depending on the returned ConvValidationState (by anding * its new value, therefor setting e.doit=false in this * method will prevail). * @param e VerifyEvent to inspect * @return a ConvValidationState to be used for highlighting the text field. */ public ValidationState validateInput(VerifyEvent e) { String newValue = getNewValue(e); ValidationState val = ValidationState.OK; if (StringUtils.isEmpty(newValue)) { if (m_emptyAllowed) { val = ValidationState.EmptyAccept; } else { val = ValidationState.MightMatchAccept; } } return val; } /** * @param e event * @return value to validate */ String getNewValue(VerifyEvent e) { Text txt = (Text) e.widget; final String oldValue = txt.getText(); StringBuilder workValue = new StringBuilder(oldValue); workValue.replace(e.start, e.end, e.text); String newValue = workValue.toString(); return newValue; } /** * @param control associated widget * @param conv ParamValueConverter to use for validation * @return state following from result of ParamValueConverter */ public static ValidationState setState(Control control, ParamValueConverter conv) { ValidationState val = ValidationState.OK; List<TokenError> errors = conv.getErrors(); if (errors.isEmpty()) { val = ValidationState.OK; } else { for (TokenError error : errors) { if (error.getValidationState() == ParamValueConverter.ConvValidationState.invalid) { val = ValidationState.DontMatchAccept; setTooltip(error, control); } else if (error.getValidationState() == ParamValueConverter.ConvValidationState.undecided) { val = ValidationState.MightMatchAccept; } } } control.setData(Constants.VALID_STATE, val); return val; } /** * @param error error to display a message for * @param control associated widget */ public static void setTooltip(TokenError error, Control control) { if (error.getI18NErrorKey() != null) { String tooltip = StringConstants.EMPTY; if (error.getI18NErrorKey().equals(MessageIDs.E_SYNTAX_ERROR)) { tooltip = MessageIDs.getMessageObject(error.getI18NErrorKey()) .getMessage(new Object[] { error.getInput() }); } else { tooltip = MessageIDs.getMessageObject(error.getI18NErrorKey()).getMessage(new Object[] {}); } control.setToolTipText(tooltip); } } /** * @return Returns the desc. */ IParamDescriptionPO getDesc() { return m_desc; } /** * @return Returns the emptyAllowed. */ boolean isEmptyAllowed() { return m_emptyAllowed; } /** * @return Returns the node. */ IParameterInterfacePO getNode() { return m_node; } }