io.github.dailystruggle.rtp.common.factory.Factory Maven / Gradle / Ivy

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package io.github.dailystruggle.rtp.common.factory;

import io.github.dailystruggle.rtp.common.configuration.ConfigParser;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;

import java.util.ArrayList;
import java.util.Enumeration;
import java.util.concurrent.ConcurrentHashMap;

/**
 * On request, find a stored object with the correct name, clone it, and return it
 *
 * @param  type of values this factory will hold
 */
public class Factory> {
    public final ConcurrentHashMap map = new ConcurrentHashMap<>();

    public void add(String name, T value) {
        map.put(name.toUpperCase(), value);
    }

    public Enumeration list() {
        return map.keys();
    }

    public boolean contains(String name) {
        name = name.toUpperCase();
        if (!name.endsWith(".YML")) name = name + ".YML";
        return map.containsKey(name);
    }

    /**
     * @param name name of item
     * @return mutable copy of item
     */
    @Nullable
    public FactoryValue construct(String name) {
        String comparableName = name.toUpperCase();
        if (!comparableName.endsWith(".YML")) comparableName = comparableName + ".YML";
        //guard constructor
        T value = map.get(comparableName);
        if (value == null) {
            if (map.containsKey("DEFAULT.YML") || map.size() > 0) {
                value = map.getOrDefault("DEFAULT.YML", map.values().stream().findAny().get());
                T clone = (T) value.clone();
                clone.name = (name.endsWith(".yml")) ? name : name + ".yml";

                if (clone instanceof ConfigParser) {
                    ConfigParser configParser = (ConfigParser) clone;
                    configParser.check(configParser.version, configParser.pluginDirectory, null);
                }
                value = clone;
            } else return null;
        }
        return value.clone();
    }

    @Nullable
    public FactoryValue get(String name) {
        T t = map.get(name.toUpperCase());
        if (t == null) return null;
        return t.clone();
    }

    @NotNull
    public FactoryValue getOrDefault(String name) {
        name = name.toUpperCase();
        //guard constructor
        T value = (T) get(name);
        if (value == null) {
            if (map.containsKey("DEFAULT.YML")) {
                value = (T) construct(name);
                map.put(name, value);
            } else return new ArrayList<>(map.values()).get(0).clone();
        }
        return value.clone();
    }
}