| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You 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.apache.cocoon.forms.datatype.validationruleimpl; |
| |
| import org.apache.cocoon.forms.FormsConstants; |
| import org.apache.cocoon.forms.datatype.ValidationRuleBuilder; |
| import org.apache.cocoon.forms.expression.ExpressionManager; |
| import org.apache.cocoon.forms.util.DomHelper; |
| import org.apache.avalon.framework.CascadingException; |
| import org.apache.avalon.framework.activity.Disposable; |
| import org.apache.avalon.framework.service.Serviceable; |
| import org.apache.avalon.framework.service.ServiceManager; |
| import org.apache.avalon.framework.service.ServiceException; |
| import org.apache.excalibur.xml.sax.XMLizable; |
| import org.w3c.dom.Element; |
| import org.outerj.expression.Expression; |
| import org.outerj.expression.TokenMgrError; |
| |
| /** |
| * Abstract base class for ValidationRuleBuilder implementations. |
| * |
| * @version $Id$ |
| */ |
| public abstract class AbstractValidationRuleBuilder |
| implements ValidationRuleBuilder, Serviceable, Disposable { |
| |
| protected ExpressionManager expressionManager; |
| protected ServiceManager serviceManager; |
| |
| /** |
| * @see org.apache.avalon.framework.service.Serviceable#service(org.apache.avalon.framework.service.ServiceManager) |
| */ |
| public void service(ServiceManager serviceManager) throws ServiceException { |
| this.serviceManager = serviceManager; |
| this.expressionManager = (ExpressionManager)serviceManager.lookup(ExpressionManager.ROLE); |
| } |
| |
| /** |
| * Checks if the validation rule configuration contains a custom failmessage, and if so, |
| * sets it one the ValidationRule. |
| */ |
| protected void buildFailMessage(Element validationRuleElement, AbstractValidationRule rule) { |
| Element failMessageElement = DomHelper.getChildElement(validationRuleElement, FormsConstants.DEFINITION_NS, "failmessage"); |
| if (failMessageElement != null) { |
| XMLizable failMessage = DomHelper.compileElementContent(failMessageElement); |
| rule.setFailMessage(failMessage); |
| } |
| } |
| |
| /** |
| * Parses an expression and throws a nice error message if this fails. |
| */ |
| protected Expression parseExpression(String exprString, Element element, String attrName) throws Exception { |
| try { |
| return expressionManager.parse(exprString); |
| } catch (TokenMgrError e) { |
| throw new CascadingException("Error in expression \"" + exprString + "\" in attribute \"" + attrName + "\" at " + DomHelper.getLocation(element), e); |
| } catch (Exception e) { |
| throw new CascadingException("Error in expression \"" + exprString + "\" in attribute \"" + attrName + "\" at " + DomHelper.getLocation(element), e); |
| } |
| } |
| |
| public void dispose() { |
| this.serviceManager.release(this.expressionManager); |
| this.expressionManager = null; |
| this.serviceManager = null; |
| } |
| } |