SQLiteStatementType.java

/*
 * Copyright (C) 2006 The Android Open Source Project
 *
 * 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.
 */
// modified from original source see README at the top level of this project

package io.requery.android.database.sqlite;

import java.util.Locale;

class SQLiteStatementType {

    /** One of the values returned by {@link #getSqlStatementType(String)}. */
    public static final int STATEMENT_SELECT = 1;
    /** One of the values returned by {@link #getSqlStatementType(String)}. */
    public static final int STATEMENT_UPDATE = 2;
    /** One of the values returned by {@link #getSqlStatementType(String)}. */
    public static final int STATEMENT_ATTACH = 3;
    /** One of the values returned by {@link #getSqlStatementType(String)}. */
    public static final int STATEMENT_BEGIN = 4;
    /** One of the values returned by {@link #getSqlStatementType(String)}. */
    public static final int STATEMENT_COMMIT = 5;
    /** One of the values returned by {@link #getSqlStatementType(String)}. */
    public static final int STATEMENT_ABORT = 6;
    /** One of the values returned by {@link #getSqlStatementType(String)}. */
    public static final int STATEMENT_PRAGMA = 7;
    /** One of the values returned by {@link #getSqlStatementType(String)}. */
    public static final int STATEMENT_DDL = 8;
    /** One of the values returned by {@link #getSqlStatementType(String)}. */
    public static final int STATEMENT_UNPREPARED = 9;
    /** One of the values returned by {@link #getSqlStatementType(String)}. */
    public static final int STATEMENT_OTHER = 99;

    private SQLiteStatementType() {
    }

    /**
     * Returns one of the following which represent the type of the given SQL statement.
     * <ol>
     *   <li>{@link #STATEMENT_SELECT}</li>
     *   <li>{@link #STATEMENT_UPDATE}</li>
     *   <li>{@link #STATEMENT_ATTACH}</li>
     *   <li>{@link #STATEMENT_BEGIN}</li>
     *   <li>{@link #STATEMENT_COMMIT}</li>
     *   <li>{@link #STATEMENT_ABORT}</li>
     *   <li>{@link #STATEMENT_OTHER}</li>
     * </ol>
     * @param sql the SQL statement whose type is returned by this method
     * @return one of the values listed above
     */
    public static int getSqlStatementType(String sql) {
        sql = sql.trim();
        if (sql.length() < 3) {
            return STATEMENT_OTHER;
        }
        String prefixSql = sql.substring(0, 3).toUpperCase(Locale.US);
        switch (prefixSql) {
            case "SEL":
                return STATEMENT_SELECT;
            case "INS":
            case "UPD":
            case "REP":
            case "DEL":
                return STATEMENT_UPDATE;
            case "ATT":
                return STATEMENT_ATTACH;
            case "COM":
                return STATEMENT_COMMIT;
            case "END":
                return STATEMENT_COMMIT;
            case "ROL":
                return STATEMENT_ABORT;
            case "BEG":
                return STATEMENT_BEGIN;
            case "PRA":
                return STATEMENT_PRAGMA;
            case "CRE":
            case "DRO":
            case "ALT":
                return STATEMENT_DDL;
            case "ANA":
            case "DET":
                return STATEMENT_UNPREPARED;
        }
        return STATEMENT_OTHER;
    }
}