SQLHelper.java

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/*
 * Sleuth Kit Data Model
 *
 * Copyright 2020 Basis Technology Corp.
 * Contact: carrier <at> sleuthkit <dot> org
 *
 * 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.sleuthkit.datamodel;

interface SQLHelper {
        
        // Get the type for the primary key
        String getPrimaryKey();
        
        // Get the type for big int-type data
        String getBigIntType();
        
        // Get the type for blob-type data
        String getBlobType();
        
        // Get the description column name for the tsk_vs_parts table.
        // This varies between SQLite and PostgreSQL.
        String getVSDescColName();


        class PostgreSQLHelper implements SQLHelper {

                @Override
                public String getPrimaryKey() {
                        return "BIGSERIAL";
                }

                @Override
                public String getBigIntType() {
                        return "BIGINT";
                }

                @Override
                public String getBlobType() {
                        return "BYTEA";
                }

                @Override
                public String getVSDescColName() {
                        return "descr";
                }
        }
        
        class SQLiteHelper implements SQLHelper {

                @Override
                public String getPrimaryKey() {
                        return "INTEGER";
                }

                @Override
                public String getBigIntType() {
                        return "INTEGER";
                }

                @Override
                public String getBlobType() {
                        return "BLOB";
                }

                @Override
                public String getVSDescColName() {
                        return "desc";
                }
        }
}