MaxConstraint.java

/*
 * Copyright 2004-2005 Graeme Rocher
 *
 * 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.grails.validation;

import grails.util.GrailsClassUtils;
import grails.validation.AbstractConstraint;
import grails.validation.ConstrainedProperty;

import org.springframework.validation.Errors;

/**
 * Implements a maximum value constraint.
 *
 * @author Graeme Rocher
 * @since 0.4
 * @deprecated Replaced by {@link org.grails.datastore.gorm.validation.constraints.MaxConstraint}
 */
@Deprecated
@SuppressWarnings({"unchecked","rawtypes"})
public class MaxConstraint extends AbstractConstraint {

    private Comparable maxValue;

    /**
     * @return Returns the maxValue.
     */
    public Comparable getMaxValue() {
        return maxValue;
    }

    /* (non-Javadoc)
     * @see org.grails.validation.Constraint#supports(java.lang.Class)
     */
    public boolean supports(Class type) {
        return type != null && (
                Comparable.class.isAssignableFrom(type) ||
                GrailsClassUtils.isAssignableOrConvertibleFrom(Number.class, type));
    }

    /* (non-Javadoc)
     * @see org.grails.validation.ConstrainedProperty.AbstractConstraint#setParameter(java.lang.Object)
     */
    @Override
    public void setParameter(Object constraintParameter) {
        if (constraintParameter == null) {
            throw new IllegalArgumentException("Parameter for constraint [" +
                    ConstrainedProperty.MAX_CONSTRAINT + "] of property [" +
                    constraintPropertyName + "] of class [" + constraintOwningClass + "] cannot be null");
        }

        if (!(constraintParameter instanceof Comparable<?>) && (!constraintParameter.getClass().isPrimitive())) {
            throw new IllegalArgumentException("Parameter for constraint [" +
                    ConstrainedProperty.MAX_CONSTRAINT + "] of property [" + constraintPropertyName +
                    "] of class ["+constraintOwningClass + "] must implement the interface [java.lang.Comparable]");
        }

        Class<?> propertyClass = GrailsClassUtils.getPropertyType(constraintOwningClass, constraintPropertyName);
        if (!GrailsClassUtils.isAssignableOrConvertibleFrom(constraintParameter.getClass(), propertyClass)) {
            throw new IllegalArgumentException("Parameter for constraint [" +
                    ConstrainedProperty.MAX_CONSTRAINT + "] of property [" +
                    constraintPropertyName + "] of class [" + constraintOwningClass +
                    "] must be the same type as property: [" + propertyClass.getName() + "]");
        }

        maxValue = (Comparable)constraintParameter;
        super.setParameter(constraintParameter);
    }

    public String getName() {
        return ConstrainedProperty.MAX_CONSTRAINT;
    }

    @Override
    protected void processValidate(Object target, Object propertyValue, Errors errors) {
        if (maxValue.compareTo(propertyValue) < 0) {
            Object[] args = new Object[] { constraintPropertyName, constraintOwningClass, propertyValue, maxValue  };
            rejectValue(target, errors, ConstrainedProperty.DEFAULT_INVALID_MAX_MESSAGE_CODE,
                    ConstrainedProperty.MAX_CONSTRAINT + ConstrainedProperty.EXCEEDED_SUFFIX, args);
        }
    }
}