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package net.spals.appbuilder.graph.model;

import com.google.auto.value.AutoValue;
import com.google.common.base.Preconditions;
import com.google.inject.Key;

import java.util.Optional;

import static net.spals.appbuilder.graph.model.ServiceGraphVertex.DEFAULT_SEPARATOR;

/**
 * @author tkral
 */
@AutoValue
public abstract class ServiceTreeVertex implements IServiceTreeVertex {

    abstract IServiceDAGVertex getDelegate();

    static  ServiceTreeVertex createTreeChild(final IServiceDAGVertex delegate,
                                                      final IServiceTreeVertex parent) {
        Preconditions.checkNotNull(parent);
        return new AutoValue_ServiceTreeVertex<>(delegate, Optional.of(parent));
    }

    static  ServiceTreeVertex createTreeRoot(final IServiceDAGVertex delegate) {
        return new AutoValue_ServiceTreeVertex<>(delegate, Optional.empty());
    }

    @Override
    public final Key getGuiceKey() {
        return getDelegate().getGuiceKey();
    }

    @Override
    public final T getServiceInstance() {
        return getDelegate().getServiceInstance();
    }

    @Override
    public abstract Optional> getParent();

    @Override
    public final Optional> getProviderSource() {
        return getDelegate().getProviderSource();
    }

    @Override
    public String toString() {
        return toString(DEFAULT_SEPARATOR);
    }

    @Override
    public final String toString(final String separator) {
        return getDelegate().toString(separator);
    }
}