bval-jsr/src/main/java/org/apache/bval/jsr/metadata/DualValidationMappingProvider.java

/*
 *  Licensed to the Apache Software Foundation (ASF) under one or more
 *  contributor license agreements.  See the NOTICE file distributed with
 *  this work for additional information regarding copyright ownership.
 *  The ASF licenses this file to You 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.bval.jsr.metadata;

import java.lang.annotation.Annotation;
import java.util.Arrays;

import org.apache.bval.util.Validate;

public class DualValidationMappingProvider extends ValidatorMappingProvider {
    private final ValidatorMappingProvider primaryDelegate;
    private final ValidatorMappingProvider secondaryDelegate;

    public DualValidationMappingProvider(ValidatorMappingProvider primary, ValidatorMappingProvider secondary) {
        super();
        this.primaryDelegate = Validate.notNull(primary, "primary delegate");
        this.secondaryDelegate = Validate.notNull(secondary, "secondary delegate");
    }

    @Override
    protected <A extends Annotation> ValidatorMapping<A> doGetValidatorMapping(Class<A> constraintType) {

        final ValidatorMapping<A> secondaryMapping = secondaryDelegate.doGetValidatorMapping(constraintType);
        final ValidatorMapping<A> primaryMapping = primaryDelegate.doGetValidatorMapping(constraintType);
        if (secondaryMapping == null) {
            return primaryMapping;
        }
        final AnnotationBehavior annotationBehavior = secondaryMapping.getAnnotationBehavior();

        if (primaryMapping == null || annotationBehavior == AnnotationBehavior.EXCLUDE) {
            return secondaryMapping;
        }
        return ValidatorMapping.merge(Arrays.asList(primaryMapping, secondaryMapping),
            AnnotationBehaviorMergeStrategy.consensus());
    }
}