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/**
 * Copyright (C) 2015 The Gravitee team (http://gravitee.io)
 *
 * 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 io.gravitee.management.rest.resource.param;

import javax.ws.rs.WebApplicationException;
import java.util.ArrayList;
import java.util.List;

/**
 * @author David BRASSELY (david.brassely at graviteesource.com)
 * @author GraviteeSource Team
 */
public abstract class AbstractListParam extends AbstractParam>{

    private static final String SEPARATOR = ",";

    public AbstractListParam(String param) throws WebApplicationException {
        super(param);
    }

    @Override
    protected List parse(String param) throws Throwable {
        List values = new ArrayList<>();

        if (param != null) {
            String[] params = param.replaceAll("\\s","").split(SEPARATOR);
            for (String _param : params) {
                try {
                    if (!_param.isEmpty()) {
                        values.add(parseValue(_param));
                    }
                } catch (Exception ex) {
                    // nothing to do
                }
            }
        }

        return values;
    }

    protected abstract T parseValue(String param);
}