+
−/*
+
− * 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.oldmapi;
+
−
+
−import nl.cwi.monetdb.mcl.protocol.ProtocolException;
+
−import nl.cwi.monetdb.mcl.protocol.TableResultHeaders;
+
−
+
−import java.nio.CharBuffer;
+
−
+
−final class OldMapiTableHeaderParser {
+
−
+
−    static TableResultHeaders GetNextTableHeader(CharBuffer lineBuffer, String[] columnNames, int[] columnLengths,
+
−                                                 String[] types, String[] tableNames) throws ProtocolException {
+
−        TableResultHeaders res = TableResultHeaders.UNKNOWN;
+
−        int currentLength = lineBuffer.limit();
+
−        char[] array = lineBuffer.array();
+
−
+
−        int pos = 0;
+
−        boolean foundChar = false, nameFound = false;
+
−
+
−        // find header name
+
−        for (int i = currentLength - 1; i >= 0; i--) {
+
−            switch (array[i]) {
+
−                case ' ':
+
−                case '\n':
+
−                case '\t':
+
−                case '\r':
+
−                    if (!foundChar) {
+
−                        currentLength = i - 1;
+
−                    } else {
+
−                        pos = i + 1;
+
−                    }
+
−                    break;
+
−                case '#':
+
−                    // found!
+
−                    nameFound = true;
+
−                    if (pos == 0) pos = i + 1;
+
−                    i = 0;	// force the loop to terminate
+
−                    break;
+
−                default:
+
−                    foundChar = true;
+
−                    pos = 0;
+
−                    break;
+
−            }
+
−        }
+
−        if (!nameFound)
+
−            throw new ProtocolException("invalid header, no header name found", pos);
+
−
+
−        // depending on the name of the header, we continue
+
−        switch (array[pos]) {
+
−            case 'n': //name
+
−                if (currentLength - pos == 4) {
+
−                    GetStringValues(array, pos - 3, columnNames);
+
−                    res = TableResultHeaders.NAME;
+
−                }
+
−                break;
+
−            case 'l': //length
+
−                if (currentLength - pos == 6) {
+
−                    GetIntValues(array, pos - 3, columnLengths);
+
−                    res = TableResultHeaders.LENGTH;
+
−                }
+
−                break;
+
−            case 't':
+
−                if (currentLength - pos == 4) { //type
+
−                    GetStringValues(array, pos - 3, types);
+
−                    res = TableResultHeaders.TYPE;
+
−                } else if (currentLength - pos == 10) { //table_name
+
−                    GetStringValues(array, pos - 3, tableNames);
+
−                    res = TableResultHeaders.TABLE;
+
−                }
+
−                break;
+
−            default:
+
−                throw new ProtocolException("unknown header: " + new String(array, pos, currentLength - pos));
+
−        }
+
−        return res;
+
−    }
+
−
+
−    private static void GetStringValues(char[] array, int stop, String[] stringValues) {
+
−        int elem = 0, start = 2;
+
−
+
−        for (int i = start + 1; i < stop; i++) {
+
−            if (array[i] == '\t' && array[i - 1] == ',') {
+
−                stringValues[elem++] = new String(array, start, i - 1 - start);
+
−                start = i + 1;
+
−            }
+
−        }
+
−        // add the left over part
+
−        stringValues[elem] = new String(array, start, stop - start);
+
−    }
+
−
+
−    private static void GetIntValues(char[] array, int stop, int[] intValues) throws ProtocolException {
+
−        int elem = 0, tmp = 0, start = 2;
+
−
+
−        for (int i = start; i < stop; i++) {
+
−            if (array[i] == ',' && array[i + 1] == '\t') {
+
−                intValues[elem++] = tmp;
+
−                tmp = 0;
+
−                i++;
+
−            } else {
+
−                tmp *= 10;
+
−                // note: don't use Character.isDigit() here, because we only want ISO-LATIN-1 digits
+
−                if (array[i] >= '0' && array[i] <= '9') {
+
−                    tmp += (int) array[i] - (int)'0';
+
−                } else {
+
−                    throw new ProtocolException("expected a digit in " + new String(array) + " at " + i);
+
−                }
+
−            }
+
−        }
+
−        // add the left over part
+
−        intValues[elem] = tmp;
+
−    }
+
−}