| /* |
| * 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.formmodel.CannotYetResolveWarning; |
| import org.apache.cocoon.forms.util.I18nMessage; |
| import org.apache.cocoon.forms.validation.ValidationError; |
| import org.outerj.expression.ExpressionContext; |
| import org.outerj.expression.Expression; |
| |
| import java.math.BigDecimal; |
| |
| /** |
| * Checks the number of values (i.e. the size of the array). This only works for Datatypes |
| * for which {@link org.apache.cocoon.forms.datatype.Datatype#isArrayType()} returns |
| * true. |
| * |
| * <p>This validation rule can perform 4 different checks: |
| * <ul> |
| * <li>check exact array size |
| * <li>check minimum array size |
| * <li>check maximum array size |
| * <li>check min and max array size |
| * </ul> |
| * |
| * @version $Id$ |
| */ |
| public class ValueCountValidationRule extends AbstractValidationRule { |
| private Expression exactExpr; |
| private Expression minExpr; |
| private Expression maxExpr; |
| |
| public void setExactExpr(Expression exactExpr) { |
| this.exactExpr = exactExpr; |
| } |
| |
| public void setMinExpr(Expression minExpr) { |
| this.minExpr = minExpr; |
| } |
| |
| public void setMaxExpr(Expression maxExpr) { |
| this.maxExpr = maxExpr; |
| } |
| |
| public ValidationError validate(Object value, ExpressionContext expressionContext) { |
| Object[] array = (Object[])value; |
| |
| if (exactExpr != null) { |
| Object result = evaluateNumeric(exactExpr, expressionContext, "exact", "value-count"); |
| if (result instanceof ValidationError) { |
| return (ValidationError)result; |
| } else if (result instanceof CannotYetResolveWarning) { |
| return null; |
| } |
| int length = ((BigDecimal)result).intValue(); |
| if (array.length != length) { |
| return hasFailMessage() ? getFailMessage() : new ValidationError(new I18nMessage("validation.array.exact-valuecount", new String[] {String.valueOf(length)}, FormsConstants.I18N_CATALOGUE)); |
| } |
| return null; |
| } else if (minExpr != null && maxExpr != null) { |
| Object result = evaluateNumeric(minExpr, expressionContext, "min", "value-count"); |
| if (result instanceof ValidationError) { |
| return (ValidationError)result; |
| } else if (result instanceof CannotYetResolveWarning) { |
| return null; |
| } |
| int minLength = ((BigDecimal)result).intValue(); |
| |
| result = evaluateNumeric(maxExpr, expressionContext, "max", "value-count"); |
| if (result instanceof ValidationError) { |
| return (ValidationError)result; |
| } else if (result instanceof CannotYetResolveWarning) { |
| return null; |
| } |
| int maxLength = ((BigDecimal)result).intValue(); |
| |
| if (array.length < minLength || array.length > maxLength) { |
| return hasFailMessage() ? getFailMessage() : new ValidationError(new I18nMessage("validation.array.range-valuecount", new String[] {String.valueOf(minLength), String.valueOf(maxLength)}, FormsConstants.I18N_CATALOGUE)); |
| } |
| return null; |
| } else if (minExpr != null) { |
| Object result = evaluateNumeric(minExpr, expressionContext, "min", "value-count"); |
| if (result instanceof ValidationError) { |
| return (ValidationError)result; |
| } else if (result instanceof CannotYetResolveWarning) { |
| return null; |
| } |
| int length = ((BigDecimal)result).intValue(); |
| if (array.length < length) { |
| return hasFailMessage() ? getFailMessage() : new ValidationError(new I18nMessage("validation.array.min-valuecount", new String[] {String.valueOf(length)}, FormsConstants.I18N_CATALOGUE)); |
| } |
| return null; |
| } else if (maxExpr != null) { |
| Object result = evaluateNumeric(maxExpr, expressionContext, "max", "value-count"); |
| if (result instanceof ValidationError) { |
| return (ValidationError)result; |
| } else if (result instanceof CannotYetResolveWarning) { |
| return null; |
| } |
| int length = ((BigDecimal)result).intValue(); |
| if (array.length > length) { |
| return hasFailMessage() ? getFailMessage() : new ValidationError(new I18nMessage("validation.array.max-valuecount", new String[] {String.valueOf(length)}, FormsConstants.I18N_CATALOGUE)); |
| } |
| return null; |
| } |
| return null; |
| } |
| |
| public boolean supportsType(Class clazz, boolean arrayType) { |
| return arrayType; |
| } |
| } |