se.tillvaxtverket.tsltrust.weblogic.hibernate.SQLiteDialect.java Source code

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Here is the source code for se.tillvaxtverket.tsltrust.weblogic.hibernate.SQLiteDialect.java

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/*
 * Copyright 2017 Swedish E-identification Board (E-legitimationsnmnden)
 *         
 *     This program is free software: you can redistribute it and/or modify
 *     it under the terms of the GNU General Public License as published by
 *     the Free Software Foundation, either version 3 of the License, or
 *     (at your option) any later version.
 * 
 *     This program is distributed in the hope that it will be useful,
 *     but WITHOUT ANY WARRANTY; without even the implied warranty of
 *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *     GNU General Public License for more details.
 * 
 *     You should have received a copy of the GNU General Public License
 *     along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package se.tillvaxtverket.tsltrust.weblogic.hibernate;

import java.sql.Types;
import org.hibernate.dialect.Dialect;
import org.hibernate.dialect.function.SQLFunctionTemplate;
import org.hibernate.dialect.function.StandardSQLFunction;
import org.hibernate.dialect.function.VarArgsSQLFunction;
import org.hibernate.type.StringType;
import org.hibernate.type.Type;

/**
 * SQLite dialect for access to SQLite databases through hibernate.
 */
public class SQLiteDialect extends Dialect {

    private static final Type stringType = new StringType();

    public SQLiteDialect() {
        super();
        registerColumnType(Types.BIT, "integer");
        registerColumnType(Types.TINYINT, "tinyint");
        registerColumnType(Types.SMALLINT, "smallint");
        registerColumnType(Types.INTEGER, "integer");
        registerColumnType(Types.BIGINT, "bigint");
        registerColumnType(Types.FLOAT, "float");
        registerColumnType(Types.REAL, "real");
        registerColumnType(Types.DOUBLE, "double");
        registerColumnType(Types.NUMERIC, "numeric");
        registerColumnType(Types.DECIMAL, "decimal");
        registerColumnType(Types.CHAR, "char");
        registerColumnType(Types.VARCHAR, "varchar");
        registerColumnType(Types.LONGVARCHAR, "longvarchar");
        registerColumnType(Types.DATE, "date");
        registerColumnType(Types.TIME, "time");
        registerColumnType(Types.TIMESTAMP, "timestamp");
        registerColumnType(Types.BINARY, "blob");
        registerColumnType(Types.VARBINARY, "blob");
        registerColumnType(Types.LONGVARBINARY, "blob");
        // registerColumnType(Types.NULL, "null");
        registerColumnType(Types.BLOB, "blob");
        registerColumnType(Types.CLOB, "clob");
        registerColumnType(Types.BOOLEAN, "integer");

        registerFunction("concat", new VarArgsSQLFunction(stringType, "", "||", ""));
        registerFunction("mod", new SQLFunctionTemplate(stringType, "?1 % ?2"));
        registerFunction("substr", new StandardSQLFunction("substr", stringType));
        registerFunction("substring", new StandardSQLFunction("substr", stringType));
    }

    @Override
    public boolean supportsIdentityColumns() {
        return true;
    }

    /*
    public boolean supportsInsertSelectIdentity() {
    return true; // As specify in NHibernate dialect
    }
     */
    @Override
    public boolean hasDataTypeInIdentityColumn() {
        return false; // As specify in NHibernate dialect
    }

    /*
    public String appendIdentitySelectToInsert(String insertString) {
    return new StringBuffer(insertString.length()+30). // As specify in NHibernate dialect
    append(insertString).
    append("; ").append(getIdentitySelectString()).
    toString();
    }
     */
    @Override
    public String getIdentityColumnString() {
        // return "integer primary key autoincrement";
        return "integer";
    }

    @Override
    public String getIdentitySelectString() {
        return "select last_insert_rowid()";
    }

    @Override
    public boolean supportsLimit() {
        return true;
    }

    @Override
    public String getLimitString(String query, boolean hasOffset) {
        return new StringBuffer(query.length() + 20).append(query)
                .append(hasOffset ? " limit ? offset ?" : " limit ?").toString();
    }

    @Override
    public boolean supportsTemporaryTables() {
        return true;
    }

    @Override
    public String getCreateTemporaryTableString() {
        return "create temporary table if not exists";
    }

    @Override
    public boolean dropTemporaryTableAfterUse() {
        return false;
    }

    @Override
    public boolean supportsCurrentTimestampSelection() {
        return true;
    }

    @Override
    public boolean isCurrentTimestampSelectStringCallable() {
        return false;
    }

    @Override
    public String getCurrentTimestampSelectString() {
        return "select current_timestamp";
    }

    @Override
    public boolean supportsUnionAll() {
        return true;
    }

    @Override
    public boolean hasAlterTable() {
        return false; // As specify in NHibernate dialect
    }

    @Override
    public boolean dropConstraints() {
        return false;
    }

    @Override
    public String getAddColumnString() {
        return "add column";
    }

    @Override
    public String getForUpdateString() {
        return "";
    }

    @Override
    public boolean supportsOuterJoinForUpdate() {
        return false;
    }

    @Override
    public String getDropForeignKeyString() {
        throw new UnsupportedOperationException("No drop foreign key syntax supported by SQLiteDialect");
    }

    @Override
    public String getAddForeignKeyConstraintString(String constraintName, String[] foreignKey,
            String referencedTable, String[] primaryKey, boolean referencesPrimaryKey) {
        throw new UnsupportedOperationException("No add foreign key syntax supported by SQLiteDialect");
    }

    @Override
    public String getAddPrimaryKeyConstraintString(String constraintName) {
        throw new UnsupportedOperationException("No add primary key syntax supported by SQLiteDialect");
    }

    @Override
    public boolean supportsIfExistsBeforeTableName() {
        return true;
    }

    @Override
    public boolean supportsCascadeDelete() {
        return false;
    }
}