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package io.protostuff.generator;

import org.stringtemplate.v4.AttributeRenderer;

import java.util.Collections;
import java.util.HashMap;
import java.util.Map;
import java.util.function.Function;

/**
 * @author Kostiantyn Shchepanovskyi
 */
public class AbstractExtensionProvider implements ExtensionProvider {

    private final Map, AttributeRenderer> attributeRenderers;

    private final Map, PropertyProvider> extenderMap;

    public AbstractExtensionProvider() {
        extenderMap = new HashMap<>();
        attributeRenderers = new HashMap<>();
    }

    @SuppressWarnings("unchecked")
    public final  void registerProperty(Class object, String property, Function function) {
        PropertyProvider extender = (PropertyProvider) extenderMap.computeIfAbsent(object,
                aClass -> new SimplePropertyProvider());
        extender.register(property, function);
    }

    @Override
    public Map, AttributeRenderer> attributeRenderers() {
        return Collections.unmodifiableMap(attributeRenderers);
    }

    @Override
    public Map, PropertyProvider> propertyProviders() {
        return Collections.unmodifiableMap(extenderMap);
    }
}