com.github.dmyersturnbull.transformations.ExtendedCommandLine.java Source code

Introduction

Here is the source code for com.github.dmyersturnbull.transformations.ExtendedCommandLine.java

Source

/*
   Copyright 2015 PharmGKB
         2015 Douglas Myers-Turnbull
    
   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 com.github.dmyersturnbull.transformations;

import org.apache.commons.cli.CommandLine;

import javax.annotation.Nonnull;
import java.io.File;
import java.math.BigDecimal;
import java.math.BigInteger;
import java.net.MalformedURLException;
import java.net.URI;
import java.net.URISyntaxException;
import java.net.URL;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.Arrays;
import java.util.List;
import java.util.Optional;
import java.util.Properties;
import java.util.function.Function;
import java.util.stream.Collectors;

/**
 * A more modern {@link CommandLine} that uses {@link Optional Optionals} and has some simple converters.
 * @author Douglas Myers-Turnbull
 */
public class ExtendedCommandLine {

    private final CommandLine m_commandLine;

    public ExtendedCommandLine(@Nonnull CommandLine commandLine) {
        m_commandLine = commandLine;
    }

    public boolean has(@Nonnull String opt) {
        return m_commandLine.hasOption(opt);
    }

    public boolean has(char opt) {
        return m_commandLine.hasOption(opt);
    }

    @Nonnull
    public Optional<String> get(@Nonnull String opt) {
        return Optional.ofNullable(m_commandLine.getOptionValue(opt));
    }

    @Nonnull
    public Optional<String> get(char opt) {
        return Optional.ofNullable(m_commandLine.getOptionValue(opt));
    }

    @Nonnull
    public Properties getProperties(@Nonnull String opt) {
        return m_commandLine.getOptionProperties(opt);
    }

    @Nonnull
    public Optional<Integer> getInt(@Nonnull String opt) {
        return get(opt).map(Integer::new);
    }

    @Nonnull
    public Optional<Long> getLong(@Nonnull String opt) {
        return get(opt).map(Long::new);
    }

    @Nonnull
    public Optional<Double> getDouble(@Nonnull String opt) {
        return get(opt).map(Double::new);
    }

    @Nonnull
    public Optional<BigDecimal> getBigDecimal(@Nonnull String opt) {
        return get(opt).map(BigDecimal::new);
    }

    @Nonnull
    public Optional<BigInteger> getBigInteger(@Nonnull String opt) {
        return get(opt).map(BigInteger::new);
    }

    @Nonnull
    public Optional<File> getFile(@Nonnull String opt) {
        return get(opt).map(File::new);
    }

    @Nonnull
    public Optional<Path> getPath(@Nonnull String opt) {
        return get(opt).map(Paths::get);
    }

    @Nonnull
    public List<String> getList(@Nonnull String opt) {
        return Arrays.asList(m_commandLine.getOptionValues(opt));
    }

    @Nonnull
    public <T> List<T> getListOf(@Nonnull String opt, final Function<String, T> converter) {
        return Arrays.asList(m_commandLine.getOptionValues(opt)).stream().map(converter)
                .collect(Collectors.toList());
    }

    @Nonnull
    public Optional<URI> getUri(@Nonnull String opt) throws URISyntaxException {
        return get(opt).map((str) -> {
            try {
                return new URI(str);
            } catch (URISyntaxException e) {
                throw new IllegalArgumentException("Option " + opt + " is not a valid URI", e);
            }
        });
    }

    @Nonnull
    public Optional<URL> getUrl(@Nonnull String opt) throws MalformedURLException {
        return get(opt).map((str) -> {
            try {
                return new URL(str);
            } catch (MalformedURLException e) {
                throw new IllegalArgumentException("Option " + opt + " is not a valid URL", e);
            }
        });
    }

}