uk.co.flamingpenguin.jewel.cli.AbstractCliImpl Maven / Gradle / Ivy

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package uk.co.flamingpenguin.jewel.cli;

import com.lexicalscope.fluentreflection.ReflectedClass;

/*
 * Copyright 2011 Tim Wood
 *
 * 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. 
 */

abstract class AbstractCliImpl implements Cli {
    private final ReflectedClass klass;
    private final OptionsSpecification optionsSpecification;

    public AbstractCliImpl(
            final ReflectedClass klass,
            final OptionsSpecification optionsSpecification) {
        this.klass = klass;
        this.optionsSpecification = optionsSpecification;
    }

    @Override public O parseArguments(final String... arguments) throws ArgumentValidationException {
        final ArgumentCollection parseArguments = new ArgumentParserImpl()
                .parseArguments(arguments);

        final ArgumentCollection validatedArguments =
                new ArgumentValidatorImpl(optionsSpecification).validateArguments(parseArguments);

        return argumentPresenter(klass, optionsSpecification).presentArguments(validatedArguments);
    }

    protected abstract ArgumentPresenterImpl argumentPresenter(
            ReflectedClass klass,
            OptionsSpecification specification);

    @Override public String getHelpMessage() {
        return optionsSpecification.toString();
    }

    CliSpecification getSpecification() {
        return optionsSpecification;
    }

    @Override public void describeTo(final HelpMessage helpMessage) {
        optionsSpecification.describeTo(helpMessage);
    }
}