| /* |
| * Copyright 1999-2004 The Apache Software Foundation. |
| * |
| * 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.apache.cocoon.woody.datatype.validationruleimpl; |
| |
| import org.apache.cocoon.woody.datatype.ValidationError; |
| import org.apache.cocoon.woody.formmodel.CannotYetResolveWarning; |
| import org.outerj.expression.ExpressionContext; |
| import org.outerj.expression.ExpressionException; |
| import org.outerj.expression.Expression; |
| |
| /** |
| * Generic validation rule that evaluates an expression. If the outcome of the expression is true, |
| * the validation is successful, otherwise not. |
| * |
| * @version $Id: AssertValidationRule.java,v 1.5 2004/03/05 13:02:30 bdelacretaz Exp $ |
| */ |
| public class AssertValidationRule extends AbstractValidationRule { |
| private Expression testExpression; |
| |
| public AssertValidationRule(Expression testExpression) { |
| this.testExpression = testExpression; |
| } |
| |
| public ValidationError validate(Object value, ExpressionContext expressionContext) { |
| Object expressionResult; |
| try { |
| expressionResult = testExpression.evaluate(expressionContext); |
| } catch (CannotYetResolveWarning w) { |
| return null; |
| } catch (ExpressionException e) { |
| return new ValidationError("Error evaluating expression on assert validation rule.", false); |
| } |
| |
| if (!(expressionResult instanceof Boolean)) |
| return new ValidationError("Got non-boolean result from expression on assert validation rule.", false); |
| |
| if (((Boolean)expressionResult).booleanValue()) |
| return null; |
| else |
| return hasFailMessage() ? getFailMessage() : new ValidationError("Assertion validation rule failed.", false); |
| } |
| |
| public boolean supportsType(Class clazz, boolean arrayType) { |
| return true; |
| } |
| } |