/*
* 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 number of values (i.e. the size of the array). This only works for Datatypes
* for which {@link org.apache.cocoon.woody.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: ValueCountValidationRule.java 30932 2004-07-29 17:35:38Z vgritsenko $
*/
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)}, Constants.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)}, Constants.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)}, Constants.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)}, Constants.I18N_CATALOGUE));
return null;
}
return null;
}
public boolean supportsType(Class clazz, boolean arrayType) {
return arrayType;
}
}