/*
* 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.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 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 326838 2005-10-20 06:26:53Z sylvain $
*/
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)}, FormsConstants.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)}, FormsConstants.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)}, FormsConstants.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)}, FormsConstants.I18N_CATALOGUE));
}
return null;
}
return null;
}
public boolean supportsType(Class clazz, boolean arrayType) {
return clazz.isAssignableFrom(String.class) && !arrayType;
}
}