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package org.glassfish.jersey.message.filtering;

import java.util.Collections;
import java.util.Map;
import java.util.Set;

import org.glassfish.jersey.message.filtering.spi.ObjectGraph;

/**
 * Object graph representing empty domain classes.
 *
 * @author Michal Gajdos
 */
final class EmptyObjectGraph implements ObjectGraph {

    private final Class<?> entityClass;

    EmptyObjectGraph(final Class<?> entityClass) {
        this.entityClass = entityClass;
    }

    @Override
    public Class<?> getEntityClass() {
        return entityClass;
    }

    @Override
    public Set<String> getFields() {
        return Collections.emptySet();
    }

    @Override
    public Set<String> getFields(final String parent) {
        return Collections.emptySet();
    }

    @Override
    public Map<String, ObjectGraph> getSubgraphs() {
        return Collections.emptyMap();
    }

    @Override
    public Map<String, ObjectGraph> getSubgraphs(final String parent) {
        return Collections.emptyMap();
    }
}
