/
State.java
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/
State.java
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/*******************************************************************************
* 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;
import java.util.Objects;
/*
* Processing states.
*/
public enum State {
// Initial States
INVALID(DialectCode.UNKNOWN, Category.INVALID),
INITIAL(DialectCode.UNKNOWN, Category.INITIAL),
INTERCHANGE_END(DialectCode.UNKNOWN, Category.INITIAL),
HEADER_EDIFACT_U(DialectCode.UNKNOWN, Category.EDIFACT_1),
HEADER_EDIFACT_N(DialectCode.UNKNOWN, Category.EDIFACT_2),
HEADER_TRADACOMS_S(DialectCode.UNKNOWN, Category.TRADACOMS_1),
HEADER_TRADACOMS_T(DialectCode.UNKNOWN, Category.TRADACOMS_2),
HEADER_X12_I(DialectCode.UNKNOWN, Category.X12_1),
HEADER_X12_S(DialectCode.UNKNOWN, Category.X12_2),
// Common States (shared among dialects)
INTERCHANGE_CANDIDATE(Category.HEADER), // IC
HEADER_DATA(Category.HEADER), // HD
HEADER_SEGMENT_BEGIN(Category.HEADER),
HEADER_INVALID_DATA(Category.HEADER), // HV
HEADER_COMPONENT_END(Category.HEADER), // HC
HEADER_ELEMENT_END(Category.HEADER), // HE
HEADER_SEGMENT_END(Category.HEADER),
HEADER_RELEASE(Category.HEADER_RELEASE), // HR
TAG_SEARCH(Category.TAG_SEARCH),
SEGMENT_END(Category.TAG_SEARCH),
SEGMENT_EMPTY(Category.TAG_SEARCH),
TAG_1(Category.TAG_1),
TAG_2(Category.TAG_2),
TAG_3(Category.TAG_3),
SEGMENT_BEGIN(Category.ELEMENT_PROCESS),
ELEMENT_DATA(Category.ELEMENT_PROCESS),
ELEMENT_INVALID_DATA(Category.ELEMENT_PROCESS),
COMPONENT_END(Category.ELEMENT_PROCESS),
ELEMENT_REPEAT(Category.ELEMENT_PROCESS),
ELEMENT_END(Category.ELEMENT_PROCESS),
DATA_RELEASE(Category.DATA_RELEASE),
ELEMENT_DATA_BINARY(Category.DATA_BINARY),
ELEMENT_END_BINARY(Category.DATA_BINARY_END),
TRAILER_BEGIN(Category.TRAILER),
TRAILER_ELEMENT_DATA(Category.TRAILER),
TRAILER_ELEMENT_END(Category.TRAILER),
// EDIFACT
TRAILER_EDIFACT_U(Category.TERM_7),
TRAILER_EDIFACT_N(Category.TERM_8),
TRAILER_EDIFACT_Z(Category.TERM_9),
HEADER_EDIFACT_UNB_SEARCH(Category.EDIFACT_UNB_0), // EDIFACT UNA -> UNB Only
HEADER_EDIFACT_UNB_1(Category.EDIFACT_UNB_1), // EDIFACT UNA -> UNB Only
HEADER_EDIFACT_UNB_2(Category.EDIFACT_UNB_2), // EDIFACT UNA -> UNB Only
HEADER_EDIFACT_UNB_3(Category.EDIFACT_UNB_3), // EDIFACT UNA -> UNB Only
// TRADACOMS
TRAILER_TRADACOMS_E(Category.TERM_7),
TRAILER_TRADACOMS_N(Category.TERM_8),
TRAILER_TRADACOMS_D(Category.TERM_9),
// X12
TRAILER_X12_I(Category.TERM_7),
TRAILER_X12_E(Category.TERM_8),
TRAILER_X12_A(Category.TERM_9);
public static final class DialectCode {
private DialectCode() {}
public static final int UNKNOWN = 0;
public static final int EDIFACT = 1;
public static final int TRADACOMS = 2;
public static final int X12 = 3;
}
private static final class Category {
// Initial
static final int INVALID = -1;
static final int INITIAL = 0;
static final int EDIFACT_1 = 1;
static final int EDIFACT_2 = 2;
static final int TRADACOMS_1 = 3;
static final int TRADACOMS_2 = 4;
static final int X12_1 = 5;
static final int X12_2 = 6;
// Common (placed in dialect-specific tables)
static final int HEADER = 0;
static final int HEADER_RELEASE = 1;
static final int TAG_1 = 2;
static final int TAG_2 = 3; // Common for EDIFACT & X12, overridden TRADACOMS
static final int TAG_3 = 4; // Common for EDIFACT & X12, overridden TRADACOMS
static final int ELEMENT_PROCESS = 5;
static final int DATA_RELEASE = 6;
static final int DATA_BINARY = 7;
static final int DATA_BINARY_END = 8;
static final int TRAILER = 9;
// Dialect-Specific
static final int TAG_SEARCH = 10; // Each dialect has their own version to support transition to interchange end segments
static final int TERM_7 = 11; // EDIFACT Unz, TRADACOMS End, X12 Iea
static final int TERM_8 = 12; // EDIFACT uNz, TRADACOMS eNd, X12 iEa
static final int TERM_9 = 13; // EDIFACT unZ, TRADACOMS enD, X12 ieA
static final int EDIFACT_UNB_0 = 14;
static final int EDIFACT_UNB_1 = 15;
static final int EDIFACT_UNB_2 = 16;
static final int EDIFACT_UNB_3 = 17;
}
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 HR = State.HEADER_RELEASE;
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_EDIFACT_UNB_SEARCH;
private static final State B1 = State.HEADER_EDIFACT_UNB_1;
private static final State B2 = State.HEADER_EDIFACT_UNB_2;
private static final State B3 = State.HEADER_EDIFACT_UNB_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
/*-
* SPACE SEGMT CMPST RELSE CNTRL INVLD *
* | A B D E I N S T U X Z | | | | | *
* | | | | | | | | | | | | ALNUM | ELEMT | RPEAT | WHITE | OTHER | SEGTG *
* | | | | | | | | | | | | | | | | | | | | | | | *
* | | | | | | | | | | | | | | | | | | | | | | | */
/******************* Initial */
private static final State[] FROM_INITIAL = { II, __, __, __, __, X1, __, C1, __, U1, __, __, __, __, __, __, __, __, II, II, __, __, __ };
/* ^ 0 */
private static final State[] FROM_EDIFACT_1 = { __, __, __, __, __, __, U2, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __ };
private static final State[] FROM_EDIFACT_2 = { __, IC, IC, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __ };
private static final State[] FROM_TRADACOMS_1 = { __, __, __, __, __, __, __, __, C2, __, __, __, __, __, __, __, __, __, __, __, __, __, __ };
private static final State[] FROM_TRADACOMS_2 = { __, __, __, __, __, __, __, __, __, __, IC, __, __, __, __, __, __, __, __, __, __, __, __ };
private static final State[] FROM_X12_1 = { __, __, __, __, __, __, __, X2, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __ };
/* ^ 5 */
private static final State[] FROM_X12_2 = { __, IC, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __ };
/******************* Common */
private static final State[] FROM_HEADER = { HD, HD, HD, HD, HD, HD, HD, HD, HD, HD, HD, HD, HD, HZ, HE, HC, __, HR, HD, HD, HD, HV, HE };
/* ^ 0 */
private static final State[] FROM_HEADER_RELEASE = { HD, HD, HD, HD, HD, HD, HD, HD, HD, HD, HD, HD, HD, HD, HD, HD, HD, HD, HV, HV, HD, HV, HD };
private static final State[] FROM_TAG_1 = { __, T2, T2, T2, T2, T2, T2, T2, T2, T2, T2, T2, T2, __, __, __, __, __, __, __, __, __, __ };
private static final State[] FROM_TAG_2 = { __, T3, T3, T3, T3, T3, T3, T3, T3, T3, T3, T3, T3, SY, SB, __, __, __, __, __, __, __, __ };
private static final State[] FROM_TAG_3 = { __, __, __, __, __, __, __, __, __, __, __, __, __, SY, SB, __, __, __, __, __, __, __, __ };
private static final State[] FROM_ED = { ED, ED, ED, ED, ED, ED, ED, ED, ED, ED, ED, ED, ED, SE, EE, CE, ER, DR, EI, EI, ED, EI, __ };
/* ^ 5 */
private static final State[] FROM_DR = { ED, ED, ED, ED, ED, ED, ED, ED, ED, ED, ED, ED, ED, ED, ED, ED, ED, ED, EI, EI, ED, EI, ED };
private static final State[] FROM_BD = { BD, BD, BD, BD, BD, BD, BD, BD, BD, BD, BD, BD, BD, BD, BD, BD, BD, BD, BD, BD, BD, BD, BD };
private static final State[] FROM_BE = { __, __, __, __, __, __, __, __, __, __, __, __, __, SE, EE, __, __, __, __, __, __, __, __ };
private static final State[] FROM_TRAILER = { TD, TD, TD, TD, TD, TD, TD, TD, TD, TD, TD, TD, TD, IE, TE, __, __, __, __, __, TD, __, __ };
/* ^ 9 */
/******************* EDIFACT */
private static final State[] FROM_TS_EDIFACT = { TS, T1, T1, T1, T1, T1, T1, T1, T1, U7, T1, T1, T1, __, __, __, __, __, TS, __, __, __, __ };
/* ^ 10 (follows common) */
private static final State[] FROM_EDIFACT_7 = { __, T2, T2, T2, T2, T2, U8, T2, T2, T2, T2, T2, T2, __, __, __, __, __, __, __, __, __, __ };
private static final State[] FROM_EDIFACT_8 = { __, T3, T3, T3, T3, T3, T3, T3, T3, T3, T3, U9, T3, __, SB, __, __, __, __, __, __, __, __ };
private static final State[] FROM_EDIFACT_9 = { __, __, __, __, __, __, __, __, __, __, __, __, __, __, TB, __, __, __, __, __, __, __, __ };
private static final State[] FROM_EDIFACT_UNB_0 = { B0, __, __, __, __, __, __, __, B1, B1, __, __, __, __, __, __, __, __, B0, __, __, __, __ };
private static final State[] FROM_EDIFACT_UNB_1 = { __, __, __, __, __, __, B2, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __ };
private static final State[] FROM_EDIFACT_UNB_2 = { __, __, B3, __, __, __, __, __, __, __, __, __, __, __, BB, __, __, __, __, __, __, __, __ };
private static final State[] FROM_EDIFACT_UNB_3 = { __, __, __, __, __, __, __, __, __, __, __, __, __, __, BB, __, __, __, __, __, __, __, __ };
/******************* TRADACOMS */
private static final State[] FROM_TS_TRADACOMS = { TS, T1, T1, T1, C7, T1, T1, T1, T1, T1, T1, T1, T1, __, __, __, __, __, TS, __, __, __, __ };
/* ^ 10 (follows common) */
private static final State[] FROM_TRADACOMS_7 = { __, T2, T2, T2, T2, T2, C8, T2, T2, T2, T2, T2, T2, __, __, __, __, __, __, __, __, __, __ };
private static final State[] FROM_TRADACOMS_8 = { __, T3, T3, C9, T3, T3, T3, T3, T3, T3, T3, T3, T3, __, __, __, __, __, __, __, __, __, SB };
private static final State[] FROM_TRADACOMS_9 = { __, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __, TB };
private static final State[] FROM_TAG_2_TRADACOMS = { __, T3, T3, T3, T3, T3, T3, T3, T3, T3, T3, T3, T3, SY, __, __, __, __, __, __, __, __, SB };
private static final State[] FROM_TAG_3_TRADACOMS = { __, __, __, __, __, __, __, __, __, __, __, __, __, SY, __, __, __, __, __, __, __, __, SB };
/******************* X12 */
private static final State[] FROM_TS_X12 = { TS, T1, T1, T1, T1, X7, T1, T1, T1, T1, T1, T1, T1, __, __, __, __, __, TS, __, __, __, __ };
/* ^ 10 (follows common) */
private static final State[] FROM_X12_7 = { __, T2, T2, T2, X8, T2, T2, T2, T2, T2, T2, T2, T2, __, __, __, __, __, __, __, __, __, __ };
private static final State[] FROM_X12_8 = { __, X9, T3, T3, T3, T3, T3, T3, T3, T3, T3, T3, T3, __, SB, __, __, __, __, __, __, __, __ };
private static final State[] FROM_X12_9 = { __, __, __, __, __, __, __, __, __, __, __, __, __, __, TB, __, __, __, __, __, __, __, __ };
private static final State[][] TRANSITION_INITIAL = {
FROM_INITIAL,
FROM_EDIFACT_1,
FROM_EDIFACT_2,
FROM_TRADACOMS_1,
FROM_TRADACOMS_2,
FROM_X12_1,
FROM_X12_2
};
private static final State[][] TRANSITION_EDIFACT = {
// Common
FROM_HEADER,
FROM_HEADER_RELEASE,
FROM_TAG_1,
FROM_TAG_2,
FROM_TAG_3,
FROM_ED,
FROM_DR,
FROM_BD,
FROM_BE,
FROM_TRAILER,
// Dialect-specific
FROM_TS_EDIFACT,
FROM_EDIFACT_7,
FROM_EDIFACT_8,
FROM_EDIFACT_9,
FROM_EDIFACT_UNB_0,
FROM_EDIFACT_UNB_1,
FROM_EDIFACT_UNB_2,
FROM_EDIFACT_UNB_3
};
private static final State[][] TRANSITION_TRADACOMS = {
// Common
FROM_HEADER,
FROM_HEADER_RELEASE,
FROM_TAG_1,
FROM_TAG_2_TRADACOMS, // Overrides common transitions
FROM_TAG_3_TRADACOMS, // Overrides common transitions
FROM_ED,
FROM_DR,
FROM_BD,
FROM_BE,
FROM_TRAILER,
// Dialect-specific
FROM_TS_TRADACOMS,
FROM_TRADACOMS_7,
FROM_TRADACOMS_8,
FROM_TRADACOMS_9
};
private static final State[][] TRANSITION_X12 = {
// Common
FROM_HEADER,
FROM_HEADER_RELEASE,
FROM_TAG_1,
FROM_TAG_2,
FROM_TAG_3,
FROM_ED,
FROM_DR,
FROM_BD,
FROM_BE,
FROM_TRAILER,
// Dialect-specific
FROM_TS_X12,
FROM_X12_7,
FROM_X12_8,
FROM_X12_9
};
private static final State[][][] TRANSITIONS = {
TRANSITION_INITIAL,
TRANSITION_EDIFACT,
TRANSITION_TRADACOMS,
TRANSITION_X12
};
// @formatter:on
private final int table;
private final int code;
State(int table, int code) {
this.table = table;
this.code = code;
}
State(int code) {
this(-1, code);
}
public static State transition(State state, Dialect dialect, CharacterClass clazz) {
if (state.table != -1) {
/*
* A state's table is set to force transition to another table. For example,
* end of interchange states transition back to the unknown dialect transition
* table.
*/
return state.transition(state.table, clazz);
}
Objects.requireNonNull(dialect, "dialect was unexpectedly null");
return state.transition(dialect.getDialectStateCode(), clazz);
}
public State transition(int dialect, CharacterClass clazz) {
return TRANSITIONS[dialect][code][clazz.code];
}
public boolean isHeaderState() {
return Category.HEADER == code;
}
}