cli2/src/main/java/org/onosproject/cli2/AbstractChoicesCompleter.java

/*
 * Copyright 2015-present Open Networking Foundation
 *
 * 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.onosproject.cli2;

import org.apache.karaf.shell.api.console.CommandLine;
import org.apache.karaf.shell.api.console.Session;
import org.apache.karaf.shell.support.completers.StringsCompleter;

import java.util.List;
import java.util.SortedSet;

/**
 * Abstraction of a completer with preset choices.
 */
public abstract class AbstractChoicesCompleter extends AbstractCompleter {

    protected abstract List<String> choices();

    @Override
    public int complete(Session session, CommandLine commandLine, List<String> candidates) {
        StringsCompleter delegate = new StringsCompleter();
        SortedSet<String> strings = delegate.getStrings();
        choices().forEach(strings::add);
        return delegate.complete(session, commandLine, candidates);
    }

}