jmms.core.MetaConfig Maven / Gradle / Ivy

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/*
 *   Copyright 2019 the original author or authors.
 *
 *   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 jmms.core;

import leap.lang.Strings;
import leap.lang.Valued;

import java.util.HashMap;
import java.util.Map;

public class MetaConfig {

    private static MetaConfig INST = new MetaConfig();

    public static MetaConfig get() {
        return INST;
    }

    public static void set(MetaConfig inst) {
        INST = inst;
    }

    public enum ExtendStrategy implements Valued {
        MERGE("merge"),
        OVERRIDE("override"),
        DEFAULT("default");

        private final String value;

        ExtendStrategy(String value) {
            this.value = value;
        }

        public boolean isMerge() {
            return this == MERGE;
        }

        public boolean isOverride() {
            return this == OVERRIDE;
        }

        @Override
        public String getValue() {
            return value;
        }
    }

    protected ExtendStrategies extendStrategies = new ExtendStrategies();

    public ExtendStrategy getAttrsExtendStrategyOf(Object o) {
        String name = Strings.lowerCamel(Strings.removeStart(o.getClass().getSimpleName(), "Meta"));

        Map attrs    = extendStrategies.getAttrs();
        ExtendStrategy              strategy = attrs.get(name);
        if (null == strategy) {
            strategy = attrs.get("default");
        }
        if (null == strategy) {
            strategy = ExtendStrategy.DEFAULT;
        }
        return strategy;
    }

    public ExtendStrategies getExtendStrategies() {
        return extendStrategies;
    }

    public void setExtendStrategies(ExtendStrategies extendStrategies) {
        this.extendStrategies = extendStrategies;
    }

    public static class ExtendStrategies {

        protected Map attrs = new HashMap<>();

        public Map getAttrs() {
            return attrs;
        }

        public void setAttrs(Map attrs) {
            this.attrs = attrs;
        }
    }

}