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/*
 * Copyright 2017-2018 Michael Hoffer . All rights reserved.
 * Copyright 2017-2018 Goethe Center for Scientific Computing, University Frankfurt. All rights reserved.
 *
 * 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.
 *
 * If you use this software for scientific research then please cite the following publication(s):
 *
 * M. Hoffer, C. Poliwoda, & G. Wittum. (2013). Visual reflection library:
 * a framework for declarative GUI programming on the Java platform.
 * Computing and Visualization in Science, 2013, 16(4),
 * 181–192. http://doi.org/10.1007/s00791-014-0230-y
 */
package eu.mihosoft.vmf.vmftext.grammar;

import eu.mihosoft.vmf.runtime.core.DelegatedBehavior;

public class GetRootClassDelegate implements DelegatedBehavior {
    private GrammarModel caller;

    @Override
    public void setCaller(GrammarModel caller) {
        this.caller = caller;
    }

    public boolean hasRootClass() {
        return !caller.getRuleClasses().isEmpty();
    }

    public RuleClass rootClass() {
        if(hasRootClass()) {
            return caller.getRuleClasses().get(0);
        } else {
            return null;
        }
    }
}