| /* |
| * 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.apache.cocoon.woody.util.I18nMessage; |
| import org.apache.cocoon.woody.Constants; |
| import org.outerj.expression.ExpressionContext; |
| import org.outerj.expression.Expression; |
| |
| import java.math.BigDecimal; |
| |
| /** |
| * Checks the length of a String. |
| * |
| * <p>This validation rule can perform 4 different checks: |
| * <ul> |
| * <li>check exact string length |
| * <li>check minimum string length |
| * <li>check maximum string length |
| * <li>check min and max string length |
| * </ul> |
| * |
| * @version $Id: LengthValidationRule.java,v 1.5 2004/03/05 13:02:30 bdelacretaz Exp $ |
| */ |
| public class LengthValidationRule 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) { |
| String string = (String)value; |
| |
| if (exactExpr != null) { |
| Object result = evaluateNumeric(exactExpr, expressionContext, "exact", "length"); |
| if (result instanceof ValidationError) |
| return (ValidationError)result; |
| else if (result instanceof CannotYetResolveWarning) |
| return null; |
| int length = ((BigDecimal)result).intValue(); |
| if (string.length() != length) |
| return hasFailMessage() ? getFailMessage() : new ValidationError(new I18nMessage("validation.string.exact-length", new String[] {String.valueOf(length)}, Constants.I18N_CATALOGUE)); |
| return null; |
| } else if (minExpr != null && maxExpr != null) { |
| Object result = evaluateNumeric(minExpr, expressionContext, "min", "length"); |
| if (result instanceof ValidationError) |
| return (ValidationError)result; |
| else if (result instanceof CannotYetResolveWarning) |
| return null; |
| int minLength = ((BigDecimal)result).intValue(); |
| |
| result = evaluateNumeric(maxExpr, expressionContext, "max", "length"); |
| if (result instanceof ValidationError) |
| return (ValidationError)result; |
| else if (result instanceof CannotYetResolveWarning) |
| return null; |
| int maxLength = ((BigDecimal)result).intValue(); |
| |
| if (string.length() < minLength || string.length() > maxLength) |
| return hasFailMessage() ? getFailMessage() : new ValidationError(new I18nMessage("validation.string.range-length", new String[] {String.valueOf(minLength), String.valueOf(maxLength)}, Constants.I18N_CATALOGUE)); |
| return null; |
| } else if (minExpr != null) { |
| Object result = evaluateNumeric(minExpr, expressionContext, "min", "length"); |
| if (result instanceof ValidationError) |
| return (ValidationError)result; |
| else if (result instanceof CannotYetResolveWarning) |
| return null; |
| int length = ((BigDecimal)result).intValue(); |
| if (string.length() < length) |
| return hasFailMessage() ? getFailMessage() : new ValidationError(new I18nMessage("validation.string.min-length", new String[] {String.valueOf(length)}, Constants.I18N_CATALOGUE)); |
| return null; |
| } else if (maxExpr != null) { |
| Object result = evaluateNumeric(maxExpr, expressionContext, "max", "length"); |
| if (result instanceof ValidationError) |
| return (ValidationError)result; |
| else if (result instanceof CannotYetResolveWarning) |
| return null; |
| int length = ((BigDecimal)result).intValue(); |
| if (string.length() > length) |
| return hasFailMessage() ? getFailMessage() : new ValidationError(new I18nMessage("validation.string.max-length", new String[] {String.valueOf(length)}, Constants.I18N_CATALOGUE)); |
| return null; |
| } |
| return null; |
| } |
| |
| public boolean supportsType(Class clazz, boolean arrayType) { |
| return clazz.isAssignableFrom(String.class) && !arrayType; |
| } |
| } |