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