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Object mapper for the DataStax CQL Java Driver.

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/*
 * Copyright (C) 2012-2017 DataStax Inc.
 *
 * 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 com.datastax.driver.mapping;

import com.datastax.driver.core.ConsistencyLevel;

import java.util.ArrayList;
import java.util.List;

class EntityMapper {

    private final Class entityClass;
    final String keyspace;
    final String table;

    final ConsistencyLevel writeConsistency;
    final ConsistencyLevel readConsistency;

    final List partitionKeys = new ArrayList();
    final List clusteringColumns = new ArrayList();

    final List allColumns = new ArrayList();

    EntityMapper(Class entityClass, String keyspace, String table, ConsistencyLevel writeConsistency, ConsistencyLevel readConsistency) {
        this.entityClass = entityClass;
        this.keyspace = keyspace;
        this.table = table;
        this.writeConsistency = writeConsistency;
        this.readConsistency = readConsistency;
    }

    int primaryKeySize() {
        return partitionKeys.size() + clusteringColumns.size();
    }

    AliasedMappedProperty getPrimaryKeyColumn(int i) {
        return i < partitionKeys.size() ? partitionKeys.get(i) : clusteringColumns.get(i - partitionKeys.size());
    }

    void addColumns(List pks, List ccs, List rgs) {
        partitionKeys.addAll(pks);
        clusteringColumns.addAll(ccs);
        allColumns.addAll(pks);
        allColumns.addAll(ccs);
        allColumns.addAll(rgs);
    }

    T newEntity() {
        return ReflectionUtils.newInstance(entityClass);
    }

}