de.flapdoodle.javaparser.parboiled.helper.AbstractParameter.java Source code

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Here is the source code for de.flapdoodle.javaparser.parboiled.helper.AbstractParameter.java

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/**
 * Copyright (C) 2013
 *   Michael Mosmann <michael@mosmann.de>
 *
 * with contributions from
 *    -
 *
 * 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 de.flapdoodle.javaparser.parboiled.helper;

import java.util.List;

import com.google.common.base.Optional;
import com.google.common.collect.Lists;

import de.flapdoodle.javaparser.tree.Parameter;

public abstract class AbstractParameter {

    public List<Parameter> asParameterList() {
        List<Parameter> ret = Lists.newArrayList();

        Optional<AbstractParameter> cur = Optional.of(this);

        Optional<Parameter> parameter;
        do {
            parameter = cur.get().asParameter();
            if (parameter.isPresent()) {
                ret.add(parameter.get());
                cur = cur.get().child();
            }
        } while (cur.isPresent() && parameter.isPresent());

        return ret;
    }

    protected abstract Optional<Parameter> asParameter();

    protected abstract Optional<AbstractParameter> child();
}