// Copyright 2017 JanusGraph 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 org.janusgraph.diskstorage.indexing;

import com.google.common.base.Preconditions;
import org.janusgraph.core.Cardinality;
import org.janusgraph.core.PropertyKey;
import org.janusgraph.core.schema.Parameter;

/**
 * @author Matthias Broecheler (me@matthiasb.com)
 */
public class StandardKeyInformation implements KeyInformation {

    private final Class<?> dataType;
    private final Parameter[] parameters;
    private final Cardinality cardinality;


    public StandardKeyInformation(Class<?> dataType, Cardinality cardinality, Parameter... parameters) {
        Preconditions.checkNotNull(dataType);
        Preconditions.checkNotNull(parameters);
        this.dataType = dataType;
        this.parameters = parameters;
        this.cardinality = cardinality;
    }

    public StandardKeyInformation(PropertyKey key, Parameter... parameters) {
        Preconditions.checkNotNull(key);
        Preconditions.checkNotNull(parameters);
        this.dataType = key.dataType();
        this.parameters = parameters;
        this.cardinality = key.cardinality();
    }


    @Override
    public Class<?> getDataType() {
        return dataType;
    }

    public boolean hasParameters() {
        return parameters.length>0;
    }

    @Override
    public Parameter[] getParameters() {
        return parameters;
    }

    @Override
    public Cardinality getCardinality() {
        return cardinality;
    }

}