org.tomitribe.crest.cmds.processors.OptionParam Maven / Gradle / Ivy

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/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.tomitribe.crest.cmds.processors;

import org.tomitribe.crest.api.Default;
import org.tomitribe.crest.cmds.processors.types.PrimitiveTypes;
import org.tomitribe.util.Join;
import org.tomitribe.util.reflect.Parameter;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;

public class OptionParam extends Param {

    public static final String LIST_SEPARATOR = "\u0000";
    public static final String LIST_TYPE = "\uFFFF\uFFFF";
    private final String name;
    private final String defaultValue;
    private final String description;

    public OptionParam(final Parameter parameter, final String name, final String defaultVal, final String description) {
        super(parameter);

        this.name = name;
        this.defaultValue = defaultVal == null ?
                initDefault() :
                ((isListable() ? LIST_TYPE : "") + normalizeDefaultValue(defaultVal));
        this.description = description;
    }

    public String getDescription() {
        return description;
    }

    public static List getSeparatedValues(final String value) {
        if (value == null) {
            return Collections.EMPTY_LIST;
        }
        final List split = new ArrayList<>(Arrays.asList(value.split(LIST_TYPE + "|" + LIST_SEPARATOR)));
        if (!split.isEmpty()) {
            split.remove(0);
        }
        return split;
    }

    private String initDefault() {
        final Default def = getAnnotation(Default.class);

        if (def != null) {

            if (isListable()) {

                return LIST_TYPE + normalizeDefaultValue(def.value());

            } else {

                return def.value();

            }

        } else if (isListable()) {

            return LIST_TYPE;

        } else if (getType().isPrimitive()) {

            final Class type = getType();
            return PrimitiveTypes.valueOf(type.toString().toUpperCase()).getDefaultValue();

        } else {

            return null;
        }
    }

    public static String normalizeDefaultValue(final String value) {
        if (value.contains(LIST_SEPARATOR)) {
            return value;
        }

        if (value.contains("\t")) {
            final String[] split = value.split("\t");
            return Join.join(LIST_SEPARATOR, split);
        }

        if (value.contains(",")) {
            final String[] split = value.split(",");
            return Join.join(LIST_SEPARATOR, split);
        }

        return value;
    }

    public String getName() {
        return name;
    }

    public String getDefaultValue() {
        return defaultValue;
    }

    public List getDefaultValues() {
        return getSeparatedValues(defaultValue);
    }

    @Override
    public String toString() {
        return "Option{" +
                "name='" + name + '\'' +
                ", default='" + defaultValue + '\'' +
                '}';
    }
}