+
−/*
+
− * This Source Code Form is subject to the terms of the Mozilla Public
+
− * License, v. 2.0.  If a copy of the MPL was not distributed with this
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− * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
− *
+
− * Copyright 1997 - July 2008 CWI, August 2008 - 2017 MonetDB B.V.
+
− */
+
−
+
−package nl.cwi.monetdb.mcl.protocol;
+
−
+
−import nl.cwi.monetdb.jdbc.MonetConnection;
+
−import nl.cwi.monetdb.mcl.responses.*;
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−
+
−import java.io.IOException;
+
−import java.text.ParsePosition;
+
−import java.text.SimpleDateFormat;
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−import java.util.Map;
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−
+
−/**
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− * A generic protocol for the underlying connection, either as a socket or an embedded connection. All the server
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− * responses are retrieved from this class. At the same time, the user queries are submitted through this class.
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− *
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− * @author Pedro Ferreira
+
− */
+
−public abstract class AbstractProtocol {
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−
+
−    /* only parse the date patterns once, use multiple times */
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−    /** Format of a date used by mserver */
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−    private final SimpleDateFormat monetDate = new SimpleDateFormat("yyyy-MM-dd");
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−
+
−    /** Format of a time */
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−    private final SimpleDateFormat monetTime = new SimpleDateFormat("HH:mm:ss.SSS");
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−    /** Format of a time with RFC822 time zone */
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−    private final SimpleDateFormat monetTimeTz = new SimpleDateFormat("HH:mm:ss.SSSZ");
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−    /** Format to print a Time String */
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−    private final SimpleDateFormat monetTimePrinter = new SimpleDateFormat("HH:mm:ss");
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−    /** Format to print a TimeTz String */
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−    private final SimpleDateFormat monetTimeTzPrinter = new SimpleDateFormat("HH:mm:ssXXX");
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−
+
−    /** Format of a timestamp */
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−    private final SimpleDateFormat monetTimestamp = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss.SSS");
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−    /** Format of a timestamp with RFC822 time zone */
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−    private final SimpleDateFormat monetTimestampTz = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss.SSSZ");
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−    /** Format to print a TimeStamp String */
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−    private final SimpleDateFormat monetTimestampPrinter = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss.SSSSSS");
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−    /** Format to print a TimeStampTz String */
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−    private final SimpleDateFormat monetTimestampTzPrinter = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss.SSSSSSXXX");
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−
+
−    /** A helper to parse Dates, Times and Timestamps, to be reused during the connection to save memory allocations. */
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−    private final ParsePosition monetParserPosition = new ParsePosition(0);
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−
+
−    /**
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−     * Gets the MonetDB Date formatter.
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−     *
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−     * @return The MonetDB Date formatter
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−     */
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−    public SimpleDateFormat getMonetDate() {
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−        return monetDate;
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−    }
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−
+
−    /**
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−     * Gets the MonetDB Time formatter.
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−     *
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−     * @return The MonetDB Time formatter
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−     */
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−    public SimpleDateFormat getMonetTime() {
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−        return monetTime;
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−    }
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−
+
−    /**
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−     * Gets the MonetDB Time with RFC822 time zone formatter.
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−     *
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−     * @return The MonetDB Time with RFC822 time zone formatter
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−     */
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−    public SimpleDateFormat getMonetTimeTz() {
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−        return monetTimeTz;
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−    }
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−
+
−    /**
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−     * Gets the MonetDB Time printer.
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−     *
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−     * @return The MonetDB Time printer
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−     */
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−    public SimpleDateFormat getMonetTimePrinter() {
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−        return monetTimePrinter;
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−    }
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−
+
−    /**
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−     * Gets the MonetDB Time with timezone printer.
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−     *
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−     * @return The MonetDB Time with timezone printer.
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−     */
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−    public SimpleDateFormat getMonetTimeTzPrinter() {
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−        return monetTimeTzPrinter;
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−    }
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−
+
−    /**
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−     * Gets the MonetDB Timestamp formatter.
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−     *
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−     * @return The MonetDB Timestamp formatter
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−     */
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−    public SimpleDateFormat getMonetTimestamp() {
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−        return monetTimestamp;
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−    }
+
−
+
−    /**
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−     * Gets the MonetDB Timestamp with RFC822 time zone formatter.
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−     *
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−     * @return The MonetDB Timestamp with RFC822 time zone formatter
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−     */
+
−    public SimpleDateFormat getMonetTimestampTz() {
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−        return monetTimestampTz;
+
−    }
+
−
+
−    /**
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−     * Gets the MonetDB Timestamp printer.
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−     *
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−     * @return The MonetDB Timestamp printer
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−     */
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−    public SimpleDateFormat getMonetTimestampPrinter() {
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−        return monetTimestampPrinter;
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−    }
+
−
+
−    /**
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−     * Gets the MonetDB Timestamp with timezone printer.
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−     *
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−     * @return The MonetDB Timestamp with timezone printer.
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−     */
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−    public SimpleDateFormat getMonetTimestampTzPrinter() {
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−        return monetTimestampTzPrinter;
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−    }
+
−
+
−    /**
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−     * Gets the Protocol parser position.
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−     *
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−     * @return The Protocol parser position
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−     */
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−    public ParsePosition getMonetParserPosition() {
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−        return monetParserPosition;
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−    }
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−
+
−    /**
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−     * Waits until the server sends the PROMPT message, meaning that the next response is ready for retrieval.
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−     *
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−     * @throws IOException If an error in the underlying connection happened.
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−     */
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−    public abstract void waitUntilPrompt() throws IOException;
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−
+
−    /**
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−     * Fetches the server's next response data.
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−     *
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−     * @throws IOException If an error in the underlying connection happened.
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−     */
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−    public abstract void fetchNextResponseData() throws IOException;
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−
+
−    /**
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−     * Gets the current server response.
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−     *
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−     * @return The integer representation of the server response
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−     */
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−    public abstract int getCurrentServerResponse();
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−
+
−    /**
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−     * Gets the next starter header of a server response.
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−     *
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−     * @return The integer representation of {@link StarterHeaders}
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−     */
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−    public abstract int getNextStarterHeader();
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−
+
−    /**
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−     * Gets the next ResultSet response from the server, belonging to a ResponseList.
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−     *
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−     * @param con The current MonetDB's JDBC connection
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−     * @param list The Response List this result set will belong to
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−     * @param seqnr The sequence number of this result set on the Response List
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−     * @param maxrows A maxrows to set if so
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−     * @return The ResultSet instance
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−     * @throws ProtocolException If an error in the underlying connection happened.
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−     */
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−    public abstract ResultSetResponse getNextResultSetResponse(MonetConnection con, MonetConnection.ResponseList list,
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−                                                               int seqnr, int maxrows) throws ProtocolException;
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−
+
−    /**
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−     * Gets the next UpdateResponse response from the server.
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−     *
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−     * @return An UpdateResponse instance
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−     * @throws ProtocolException If an error in the underlying connection happened.
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−     */
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−    public abstract UpdateResponse getNextUpdateResponse() throws ProtocolException;
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−
+
−    /**
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−     * Gets the next SchemaResponse response from the server.
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−     *
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−     * @return A SchemaResponse instance
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−     */
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−    public SchemaResponse getNextSchemaResponse() {
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−        return new SchemaResponse();
+
−    }
+
−
+
−    /**
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−     * Gets the next AutoCommitResponse response from the server.
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−     *
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−     * @return An AutoCommitResponse instance
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−     * @throws ProtocolException If an error in the underlying connection happened.
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−     */
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−    public abstract AutoCommitResponse getNextAutoCommitResponse() throws ProtocolException;
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−
+
−    /**
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−     * Get an empty DataBlockResponse from the server.
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−     *
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−     * @param rowcount - Number of tuples
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−     * @param columncount - Number of tuples
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−     * @param protocol - This protocol
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−     * @param JdbcSQLTypes - the types array
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−     * @return An AbstractDataBlockResponse instance
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−     */
+
−    public abstract AbstractDataBlockResponse getAnEmptyDataBlockResponse(int rowcount, int columncount,
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−                                                                          AbstractProtocol protocol,
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−                                                                          int[] JdbcSQLTypes);
+
−
+
−    /**
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−     * Gets the next DataBlockResponse response from the server, belonging to a ResultSetResponse
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−     *
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−     * @param rsresponses A map of ResultSetResponse, in which this Block will belong to one of them, by checking its id
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−     *                    against the keys of the Map.
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−     * @return The DataBlockResponse instance
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−     * @throws ProtocolException If an error in the underlying connection happened.
+
−     */
+
−    public abstract AbstractDataBlockResponse getNextDatablockResponse(Map<Integer, ResultSetResponse> rsresponses)
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−            throws ProtocolException;
+
−
+
−    /**
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−     * Gets the next Table Header for a ResultSetResponse. More than one of the parameter arrays can be filled at once.
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−     *
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−     * @param columnNames The column names array
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−     * @param columnLengths The column lengths array
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−     * @param types The columns SQL names array
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−     * @param tableNames The columns schemas and names in format schema.table
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−     * @return A TableResultHeaders integer representation, representing which of the fields was filled
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−     * @throws ProtocolException If an error in the underlying connection happened.
+
−     */
+
−    public abstract int getNextTableHeader(String[] columnNames, int[] columnLengths, String[] types,
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−                                           String[] tableNames) throws ProtocolException;
+
−
+
−    /**
+
−     * Gets the remaining response line from the underlying connection as a Java String. This method is mostly used to
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−     * retrieve error Strings, when they are detected while parsing a response line.
+
−     *
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−     * @param startIndex The first index in the response line to retrieve the String
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−     * @return The String representation of the line starting at the provided index
+
−     */
+
−    public abstract String getRemainingStringLine(int startIndex);
+
−
+
−    /**
+
−     * Writes a user query to the server, while providing the respective prefixes and suffixes depending on the current
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−     * language and connection used.
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−     *
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−     * @param prefix The prefix to append at the beginning of the query string
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−     * @param query The user query to submit to the server
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−     * @param suffix The suffix to append at the end of the query string
+
−     * @throws IOException If an error in the underlying connection happened.
+
−     */
+
−    public abstract void writeNextQuery(String prefix, String query, String suffix) throws IOException;
+
−}