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Object mapper for the DataStax CQL Java Driver.

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/*
 *      Copyright (C) 2012-2015 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 java.lang.reflect.Field;
import java.util.*;
import java.util.concurrent.atomic.AtomicInteger;

import com.datastax.driver.core.ConsistencyLevel;
import static com.datastax.driver.core.querybuilder.QueryBuilder.quote;

abstract class EntityMapper {

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

    public final ConsistencyLevel writeConsistency;
    public final ConsistencyLevel readConsistency;

    public final List> partitionKeys = new ArrayList>();
    public final List> clusteringColumns = new ArrayList>();
    public final List> regularColumns = new ArrayList>();

    private final List> allColumns = new ArrayList>();

    protected 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;
    }

    public String getKeyspace() {
        return quote(keyspace);
    }

    public String getTable() {
        return quote(table);
    }

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

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

    public void addColumns(List> pks, List> ccs, List> rgs) {
        partitionKeys.addAll(pks);
        allColumns.addAll(pks);

        clusteringColumns.addAll(ccs);
        allColumns.addAll(ccs);

        addColumns(rgs);
    }

    public void addColumns(List> rgs) {
        regularColumns.addAll(rgs);
        allColumns.addAll(rgs);
    }

    public abstract T newEntity();

    public List> allColumns() {
        return allColumns;
    }

    interface Factory {
        public  EntityMapper create(Class entityClass, String keyspace, String table, ConsistencyLevel writeConsistency, ConsistencyLevel readConsistency);
        public  ColumnMapper createColumnMapper(Class componentClass, Field field, int position, MappingManager mappingManager, AtomicInteger columnCounter);
    }
}