/*
 * Copyright 2016 Red Hat, Inc. and/or its affiliates.
 * 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.kie.workbench.common.stunner.core.backend.util;

import java.util.Collections;
import java.util.HashSet;
import java.util.Set;

import org.kie.workbench.common.stunner.core.definition.annotation.DefinitionSet;

public class BackendBindableDefinitionUtils {

    public static <T> Set<Class<?>> getDefinitions(final T definitionSet) {
        Set<Class<?>> result = null;
        if (null != definitionSet) {
            DefinitionSet annotation = definitionSet.getClass().getAnnotation(DefinitionSet.class);
            if (null != annotation) {
                Class<?>[] definitions = annotation.definitions();
                if (definitions.length > 0) {
                    result = new HashSet<Class<?>>(definitions.length);
                    Collections.addAll(result,
                                       definitions);
                }
            }
        }
        return result;
    }
}