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Streaming API for EDI for Java
/*******************************************************************************
* Copyright 2017 xlate.io LLC, http://www.xlate.io
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not
* use this file except in compliance with the License. You may obtain a copy of
* the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations under
* the License.
******************************************************************************/
package io.xlate.edi.internal.stream.tokenization;
/*
* Processing states.
*/
public enum State {
INVALID(-1),
INITIAL(0),
INTERCHANGE_END(0),
HEADER_X12_I(1),
HEADER_X12_S(2),
TRAILER_X12_I(3),
TRAILER_X12_E(4),
TRAILER_X12_A(5),
HEADER_EDIFACT_U(6),
HEADER_EDIFACT_N(7),
TRAILER_EDIFACT_U(8),
TRAILER_EDIFACT_N(9),
TRAILER_EDIFACT_Z(10),
HEADER_TRADACOMS_S(11),
HEADER_TRADACOMS_T(12),
TRAILER_TRADACOMS_E(13),
TRAILER_TRADACOMS_N(14),
TRAILER_TRADACOMS_D(15),
// start at last header_tag + 1
INTERCHANGE_CANDIDATE(16), // IC
HEADER_DATA(16), // HD
HEADER_SEGMENT_BEGIN(16),
HEADER_INVALID_DATA(16), // HV
HEADER_COMPONENT_END(16), // HC
HEADER_ELEMENT_END(16), // HE
HEADER_SEGMENT_END(16),
HEADER_TAG_SEARCH(17),
HEADER_TAG_1(18),
HEADER_TAG_2(19),
HEADER_TAG_3(20),
TAG_SEARCH(21),
SEGMENT_END(21),
SEGMENT_EMPTY(21),
TAG_1(22),
// TODO: Clear ELEMT for TAG_2 and TAG_3 states for TRADACOMS (requires dialect-specific transition tables)
TAG_2(23),
TAG_3(24),
SEGMENT_BEGIN(25),
ELEMENT_DATA(25),
ELEMENT_INVALID_DATA(25),
COMPONENT_END(25),
ELEMENT_REPEAT(25),
ELEMENT_END(25),
// TODO: Data Release (DR) needs a header equivalent
DATA_RELEASE(26),
ELEMENT_DATA_BINARY(27),
ELEMENT_END_BINARY(28),
TRAILER_BEGIN(29),
TRAILER_ELEMENT_DATA(29),
TRAILER_ELEMENT_END(29);
private static final State __ = State.INVALID;
private static final State II = State.INITIAL;
private static final State X1 = State.HEADER_X12_I;
private static final State X2 = State.HEADER_X12_S;
private static final State X7 = State.TRAILER_X12_I;
private static final State X8 = State.TRAILER_X12_E;
private static final State X9 = State.TRAILER_X12_A;
private static final State U1 = State.HEADER_EDIFACT_U;
private static final State U2 = State.HEADER_EDIFACT_N;
private static final State U7 = State.TRAILER_EDIFACT_U;
private static final State U8 = State.TRAILER_EDIFACT_N;
private static final State U9 = State.TRAILER_EDIFACT_Z;
private static final State C1 = State.HEADER_TRADACOMS_S;
private static final State C2 = State.HEADER_TRADACOMS_T;
private static final State C7 = State.TRAILER_TRADACOMS_E;
private static final State C8 = State.TRAILER_TRADACOMS_N;
private static final State C9 = State.TRAILER_TRADACOMS_D;
private static final State IC = State.INTERCHANGE_CANDIDATE;
private static final State HD = State.HEADER_DATA;
private static final State HV = State.HEADER_INVALID_DATA;
private static final State HC = State.HEADER_COMPONENT_END;
private static final State HE = State.HEADER_ELEMENT_END;
private static final State HZ = State.HEADER_SEGMENT_END;
private static final State B0 = State.HEADER_TAG_SEARCH;
private static final State B1 = State.HEADER_TAG_1;
private static final State B2 = State.HEADER_TAG_2;
private static final State B3 = State.HEADER_TAG_3;
private static final State BB = State.HEADER_SEGMENT_BEGIN;
private static final State TS = State.TAG_SEARCH;
private static final State T1 = State.TAG_1;
private static final State T2 = State.TAG_2;
private static final State T3 = State.TAG_3;
private static final State SB = State.SEGMENT_BEGIN;
private static final State DR = State.DATA_RELEASE;
private static final State ED = State.ELEMENT_DATA;
private static final State EI = State.ELEMENT_INVALID_DATA;
private static final State CE = State.COMPONENT_END;
private static final State ER = State.ELEMENT_REPEAT;
private static final State EE = State.ELEMENT_END;
private static final State SE = State.SEGMENT_END;
private static final State SY = State.SEGMENT_EMPTY;
private static final State TB = State.TRAILER_BEGIN;
private static final State TD = State.TRAILER_ELEMENT_DATA;
private static final State TE = State.TRAILER_ELEMENT_END;
private static final State IE = State.INTERCHANGE_END;
/**
* BD - Binary Data
*/
private static final State BD = State.ELEMENT_DATA_BINARY;
/*
* The state transition table takes the current state and the current
* symbol, and returns either a new state or an action. An action is
* represented as a negative number. An EDI text is accepted if at the end
* of the text the state is initial and if the mode list is empty.
*/
// @formatter:off
private static final State[][] TRANSITION_TABLE = {
/*-
* SPACE SEGMT CMPST RELSE CNTRL INVLD *
* | A B D E I N S T U X Z | | | | | *
* | | | | | | | | | | | | ALNUM | ELEMT | RPEAT | WHITE | OTHER | SEGTG *
* | | | | | | | | | | | | | | | | | | | | | | | *
* | | | | | | | | | | | | | | | | | | | | | | | */
/* II | IE Initial */ { II, __, __, __, __, X1, __, C1, __, U1, __, __, __, __, __, __, __, __, II, II, __, __, __ },
/* X1 (ISA / I) */ { __, __, __, __, __, __, __, X2, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __ },
/* X2 (ISA / S) */ { __, IC, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __ },
/* X7 (IEA / I) */ { __, T2, T2, T2, X8, T2, T2, T2, T2, T2, T2, T2, T2, __, __, __, __, __, __, __, __, __, __ },
/* X8 (IEA / E) */ { __, X9, T3, T3, T3, T3, T3, T3, T3, T3, T3, T3, T3, __, SB, __, __, __, __, __, __, __, __ },
/* X9 (IEA / A) */ { __, __, __, __, __, __, __, __, __, __, __, __, __, __, TB, __, __, __, __, __, __, __, __ },
/* ^ 5 */
/* U1 (UNB / U) */ { __, __, __, __, __, __, U2, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __ },
/* U2 (UNB / N) */ { __, IC, IC, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __ },
/* U7 (UNZ / U) */ { __, T2, T2, T2, T2, T2, U8, T2, T2, T2, T2, T2, T2, __, __, __, __, __, __, __, __, __, __ },
/* U8 (UNZ / N) */ { __, T3, T3, T3, T3, T3, T3, T3, T3, T3, T3, U9, T3, __, SB, __, __, __, __, __, __, __, __ },
/* U9 (UNZ / Z) */ { __, __, __, __, __, __, __, __, __, __, __, __, __, __, TB, __, __, __, __, __, __, __, __ },
/* ^ 10 */
/* C1 (STX / S) */ { __, __, __, __, __, __, __, __, C2, __, __, __, __, __, __, __, __, __, __, __, __, __, __ },
/* C2 (STX / T) */ { __, __, __, __, __, __, __, __, __, __, IC, __, __, __, __, __, __, __, __, __, __, __, __ },
/* C7 (END / E) */ { __, T2, T2, T2, T2, T2, C8, T2, T2, T2, T2, T2, T2, __, __, __, __, __, __, __, __, __, __ },
/* C8 (END / N) */ { __, T3, T3, C9, T3, T3, T3, T3, T3, T3, T3, T3, T3, __, __, __, __, __, __, __, __, __, SB },
/* C9 (END / D) */ { __, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __, TB },
/* ^ 15 */
/* IC | HD */ { HD, HD, HD, HD, HD, HD, HD, HD, HD, HD, HD, HD, HD, HZ, HE, HC, __, DR, HD, HD, HD, HV, HE },
/* B0 (Header Search*/ { B0, __, __, __, __, __, __, __, B1, B1, __, __, __, __, __, __, __, __, B0, __, __, __, __ },
/* B1 (UNB / U) */ { __, __, __, __, __, __, B2, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __ },
/* B2 (UNB / N) */ { __, __, B3, __, __, __, __, __, __, __, __, __, __, __, BB, __, __, __, __, __, __, __, __ },
/* B3 (UNB / B) */ { __, __, __, __, __, __, __, __, __, __, __, __, __, __, BB, __, __, __, __, __, __, __, __ },
/* ^ 20 */
/* SE+TS Tag Search */ { TS, T1, T1, C7, C7, X7, T1, T1, T1, U7, T1, T1, T1, __, __, __, __, __, TS, __, __, __, __ },
/* T1 Tag Char 1 * */ { __, T2, T2, T2, T2, T2, T2, T2, T2, T2, T2, T2, T2, __, __, __, __, __, __, __, __, __, __ },
/* T2 Tag Char 2 * */ { __, T3, T3, T3, T3, T3, T3, T3, T3, T3, T3, T3, T3, SY, SB, __, __, __, __, __, __, __, SB },
/* T3 Tag Char 3 * */ { __, __, __, __, __, __, __, __, __, __, __, __, __, SY, SB, __, __, __, __, __, __, __, SB },
/* Element Process */ { ED, ED, ED, ED, ED, ED, ED, ED, ED, ED, ED, ED, ED, SE, EE, CE, ER, DR, EI, EI, ED, EI, __ },
/* ^ 25 */
/* Data Release */ { ED, ED, ED, ED, ED, ED, ED, ED, ED, ED, ED, ED, ED, ED, ED, ED, ED, ED, EI, EI, ED, EI, ED },
/* Binary Data */ { BD, BD, BD, BD, BD, BD, BD, BD, BD, BD, BD, BD, BD, BD, BD, BD, BD, BD, BD, BD, BD, BD, BD },
/* Binary Data End */ { __, __, __, __, __, __, __, __, __, __, __, __, __, SE, EE, __, __, __, __, __, __, __, __ },
/* TB | TD | TE IEA */ { TD, TD, TD, TD, TD, TD, TD, TD, TD, TD, TD, TD, TD, IE, TE, __, __, __, __, __, TD, __, __ }
/* ^ 29 */
};
// @formatter:on
private int code;
State(int code) {
this.code = code;
}
public State transition(CharacterClass clazz) {
return TRANSITION_TABLE[code][clazz.code];
}
}
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