Hibernate SQLite方言

• 如下代碼有參考過github上國外某位大佬的,在發文的最新穩定版Hibernate上是可用的,有時間再仔細分析一下

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.StandardBasicTypes;

import java.sql.Types;

public final class  SQLiteDialect extends Dialect {
    
    public SQLiteDialect(){
        registerColumnType(Types.NULL, "null");

        registerColumnType(Types.INTEGER, "integer");
        registerColumnType(Types.TINYINT, "integer");
        registerColumnType(Types.SMALLINT , "integer");
        registerColumnType(Types.BIGINT, "integer");

        registerColumnType(Types.VARCHAR, "text");
        registerColumnType(Types.CLOB, "text");

        registerColumnType(Types.BLOB, "none");

        registerColumnType(Types.REAL, "real");
        registerColumnType(Types.DOUBLE, "real");
        registerColumnType(Types.FLOAT, "real");

        registerColumnType(Types.NUMERIC, "numeric");
        registerColumnType(Types.DECIMAL, "numeric");
        registerColumnType(Types.BOOLEAN, "numeric");
        registerColumnType(Types.DATE, "numeric");


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

    public boolean supportsIdentityColumns() {
        return true;
    }



    public boolean hasDataTypeInIdentityColumn() {
        return false;
    }


    public String getIdentityColumnString() {
        // return "integer primary key autoincrement";
        return "integer";
    }

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

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

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

    public boolean supportsTemporaryTables() {
        return true;
    }

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

    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; 
    }

    @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;
    }

}

import org.hibernate.dialect.pagination.LimitHandler;
import org.hibernate.dialect.pagination.LimitHelper;
import org.hibernate.engine.spi.RowSelection;

import java.sql.PreparedStatement;
import java.sql.SQLException;

public class SQLiteLimitHandler implements LimitHandler {

    public boolean supportsLimit() {
        return true;
    }


    public boolean supportsLimitOffset() {
        return true;
    }


    public String processSql(String sql, RowSelection selection) {
        if (LimitHelper.hasFirstRow(selection)) {
            return sql + " limit ? offset ?";
        } else {
            return sql + " limit ?";
        }
    }


    public int bindLimitParametersAtStartOfQuery(RowSelection selection,
                                                 PreparedStatement statement, 
                                                 int index) throws SQLException {
        return 0;
    }


    public int bindLimitParametersAtEndOfQuery(RowSelection selection, 
                                               PreparedStatement statement, 
                                               int index) throws SQLException {
        return 0;
    }


    public void setMaxRows(RowSelection selection, 
                           PreparedStatement statement) throws SQLException {

    }
}

import org.hibernate.boot.MetadataBuilder;
import org.hibernate.boot.registry.StandardServiceRegistry;
import org.hibernate.boot.spi.MetadataBuilderInitializer;
import org.hibernate.dialect.Dialect;
import org.hibernate.engine.jdbc.dialect.spi.DialectResolutionInfo;
import org.hibernate.engine.jdbc.dialect.spi.DialectResolver;

public class SQLiteMetadataBuilderInitializer 
        implements MetadataBuilderInitializer {

    private static final SQLiteDialect dialect = new SQLiteDialect();

    public void contribute(MetadataBuilder metadataBuilder,
                           StandardServiceRegistry serviceRegistry) {

    }

    static private final DialectResolver resolver = new DialectResolver() {
        public Dialect resolveDialect(DialectResolutionInfo info) {
            if (info.getDatabaseName().equals("SQLite")) {
                return dialect;
            }
            return null;
        }
    };
}

import org.hibernate.JDBCException;
import org.hibernate.exception.*;
import org.hibernate.exception.spi.SQLExceptionConversionDelegate;
import org.hibernate.exception.spi.TemplatedViolatedConstraintNameExtracter;
import org.hibernate.exception.spi.ViolatedConstraintNameExtracter;
import org.hibernate.internal.util.JdbcExceptionHelper;

import java.sql.SQLException;

public class SQLiteSQLExceptionConversionDelegate 
        implements SQLExceptionConversionDelegate {

    private static final int SQLITE_BUSY = 5;
    private static final int SQLITE_LOCKED = 6;
    private static final int SQLITE_IO_ERR = 10;
    private static final int SQLITE_PROTOCOL = 15;
    private static final int SQLITE_TOO_BIG = 18;
    private static final int SQLITE_CONSTRAINT = 19;
    private static final int SQLITE_MISMATCH = 20;
    private static final int SQLITE_NOT_ADB = 26;

    public JDBCException convert(SQLException sqlException, 
                                 String message, 
                                 String sql) {
        final int errorCode = JdbcExceptionHelper.extractErrorCode(sqlException);
        if (errorCode == SQLITE_CONSTRAINT) {
            final String constraintName = EXTRACTER.extractConstraintName(sqlException);
            return new ConstraintViolationException(message, sqlException, sql, constraintName);
        } else if (errorCode == SQLITE_TOO_BIG || errorCode == SQLITE_MISMATCH) {
            return new DataException(message, sqlException, sql);
        } else if (errorCode == SQLITE_BUSY || errorCode == SQLITE_LOCKED) {
            return new LockAcquisitionException(message, sqlException, sql);
        } else if ((errorCode >= SQLITE_IO_ERR && errorCode <= SQLITE_PROTOCOL) || errorCode == SQLITE_NOT_ADB) {
            return new JDBCConnectionException(message, sqlException, sql);
        }
        return new GenericJDBCException(message, sqlException, sql);
    }

    private static final ViolatedConstraintNameExtracter EXTRACTER 
            = new TemplatedViolatedConstraintNameExtracter() {
        @Override
        protected String doExtractConstraintName(SQLException sqle) throws NumberFormatException {
            return extractUsingTemplate("constraint ", " failed", sqle.getMessage());
        }
    };
}

鏈接不記得了,當初也是爲了解決問題,在谷歌上急匆匆找的發現能用,並改了些東西. 百毒搜東西真不行,各類結果都是重複粘貼貼,一點使用都沒有.