/*
* 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 java.math.BigDecimal;
import org.apache.cocoon.woody.Constants;
import org.apache.cocoon.woody.datatype.ValidationError;
import org.apache.cocoon.woody.formmodel.CannotYetResolveWarning;
import org.apache.cocoon.woody.util.I18nMessage;
import org.outerj.expression.Expression;
import org.outerj.expression.ExpressionContext;
/**
* Checks numeric ranges.
* Works for Integer, Long, BigDecimal, Float, Double, and Date values.
* Numbers are converted to the BigDecimal before comparing.
*
* <p>This validation rule can perform 3 different checks:
* <ul>
* <li>check minimum value
* <li>check maximum value
* <li>check min and max values (range check)
* </ul>
*
* @version $Id: RangeValidationRule.java,v 1.10 2004/03/09 13:53:47 reinhard Exp $
*/
public class RangeValidationRule extends AbstractValidationRule {
private Expression minExpr;
private Expression maxExpr;
private static final String RANGE_ELEM = "range";
private static final String MIN_ATTR = "min";
private static final String MAX_ATTR = "max";
public void setMinExpr(Expression minExpr) {
this.minExpr = minExpr;
}
public void setMaxExpr(Expression maxExpr) {
this.maxExpr = maxExpr;
}
public ValidationError validate(Object value, ExpressionContext expressionContext) {
// HACK: JDK's Comparable can't even compare Decimal to Integer
Comparable decimal;
if (value instanceof Integer) {
decimal = new BigDecimal(((Integer) value).intValue());
} else if (value instanceof Long) {
decimal = new BigDecimal(((Long) value).longValue());
} else if (value instanceof Float) {
decimal = new BigDecimal(((Float) value).floatValue());
} else if (value instanceof Double) {
decimal = new BigDecimal(((Double) value).doubleValue());
} else {
decimal = (Comparable) value;
}
Comparable min = null;
if (minExpr != null) {
Object result = evaluateComparable(minExpr, expressionContext, MIN_ATTR, RANGE_ELEM);
if (result instanceof ValidationError) {
return (ValidationError) result;
} else if (result instanceof CannotYetResolveWarning) {
return null;
}
min = (Comparable) result;
}
Comparable max = null;
if (maxExpr != null) {
Object result = evaluateComparable(maxExpr, expressionContext, MAX_ATTR, RANGE_ELEM);
if (result instanceof ValidationError) {
return (ValidationError) result;
} else if (result instanceof CannotYetResolveWarning) {
return null;
}
max = (Comparable) result;
}
if (min != null && max != null) {
if (decimal.compareTo(min) < 0 || decimal.compareTo(max) > 0) {
return hasFailMessage() ? getFailMessage() : new ValidationError(new I18nMessage("validation.numeric.range",
new String[]{min.toString(), max.toString()},
Constants.I18N_CATALOGUE));
}
return null;
} else if (min != null) {
if (decimal.compareTo(min) < 0) {
return hasFailMessage() ? getFailMessage() : new ValidationError(new I18nMessage("validation.numeric.min",
new String[]{min.toString()},
Constants.I18N_CATALOGUE));
}
return null;
} else if (max != null) {
if (decimal.compareTo(max) > 0) {
return hasFailMessage() ? getFailMessage() : new ValidationError(new I18nMessage("validation.numeric.max",
new String[]{max.toString()},
Constants.I18N_CATALOGUE));
}
return null;
}
return null;
}
public boolean supportsType(Class clazz, boolean arrayType) {
return Comparable.class.isAssignableFrom(clazz) && !arrayType;
}
}