org.jbibtex.BibTeXParser Maven / Gradle / Ivy
/* BibTeXParser.java */
/* Generated By:JavaCC: Do not edit this line. BibTeXParser.java */
package org.jbibtex;
import java.io.*;
import java.util.*;
public class BibTeXParser implements BibTeXParserConstants {
private BibTeXDatabase database = null;
private long id = 1L;
public BibTeXParser() throws ParseException {
this("");
}
/**
* @throws TokenMgrException If the input contains invalid characters.
*
* @see CharacterFilterReader
*/
public BibTeXDatabase parse(Reader reader) throws ParseException, TokenMgrException {
ReInit(new StreamProvider(reader));
token_source.SwitchTo(IN_HEADER);
return Database();
}
/**
* Checks the string argument before constructing a new {@link ReferenceValue} instance.
* The default behaviour is to prohibit unresolved references.
*
* @throws ObjectResolutionException If the string is null.
*
* @see BibTeXDatabase#resolveString(Key)
* @see BibTeXParser#getMacros()
*/
public void checkStringResolution(Key key, BibTeXString string){
if(string == null){
throw new ObjectResolutionException(key);
}
}
private void resolveCrossReferences(){
Map entries = getDatabase().getEntries();
for(BibTeXEntry entry : entries.values()){
Map fields = entry.getFields();
Value value = fields.get(BibTeXEntry.KEY_CROSSREF);
if((value == null) || (value instanceof CrossReferenceValue)){
continue;
}
Key key = new Key(value.toUserString());
BibTeXEntry object = getDatabase().resolveEntry(key);
checkCrossReferenceResolution(key, object);
entry.addField(BibTeXEntry.KEY_CROSSREF, new CrossReferenceValue(value, object));
}
}
/**
* Checks the entry argument before constructing a new {@link CrossReferenceValue} instance.
* The default behaviour is to prohibit unresolved references.
*
* @throws ObjectResolutionException If the entry is null.
*
* @see BibTeXDatabase#resolveEntry(Key)
*/
public void checkCrossReferenceResolution(Key key, BibTeXEntry entry){
if(entry == null){
throw new ObjectResolutionException(key);
}
}
/**
* Generates a key value for an anonymous BibTeX bibliography database entry.
*
* @see BibTeXEntry#getKey
* @see BibTeXDatabase#resolveEntry(Key)
*/
public String nextKey(){
return String.valueOf("jbibtex-" + this.id++);
}
public BibTeXDatabase getDatabase(){
return this.database;
}
private void setDatabase(BibTeXDatabase database){
this.database = database;
}
static
public KeyMap getMacros(){
return BibTeXParser.macros;
}
static
public void addMacro(String key, String value){
addMacro(new BibTeXString(new Key(key), new StringValue(value, StringValue.Style.BRACED)));
}
static
public void addMacro(BibTeXString macro){
BibTeXParser.macros.put(macro.getKey(), macro);
}
static
public void removeMacro(BibTeXString macro){
BibTeXParser.macros.remove(macro.getKey());
}
static
private boolean isDigitString(String string){
for(int i = 0; i < string.length(); i++){
char c = string.charAt(i);
// Only ASCII digits from '0' to '9'
if(c < '0' || c > '9'){
return false;
}
}
return (string.length() > 0);
}
private static final KeyMap macros = new KeyMap();
static {
addMacro("jan", "January");
addMacro("feb", "February");
addMacro("mar", "March");
addMacro("apr", "April");
addMacro("may", "May");
addMacro("jun", "June");
addMacro("jul", "July");
addMacro("aug", "August");
addMacro("sep", "September");
addMacro("oct", "October");
addMacro("nov", "November");
addMacro("dec", "December");
}
static
private class Field {
private Key key = null;
private Value value = null;
private Field(Key key, Value value){
setKey(key);
setValue(value);
}
public Key getKey(){
return this.key;
}
private void setKey(Key key){
this.key = key;
}
public Value getValue(){
return this.value;
}
private void setValue(Value value){
this.value = value;
}
}
final private BibTeXDatabase Database() throws ParseException {BibTeXDatabase database = new BibTeXDatabase();
BibTeXObject object = null;
setDatabase(database);
label_1:
while (true) {
switch ((jj_ntk==-1)?jj_ntk_f():jj_ntk) {
case AT:
case COMMA:{
;
break;
}
default:
jj_la1[0] = jj_gen;
break label_1;
}
switch ((jj_ntk==-1)?jj_ntk_f():jj_ntk) {
case COMMA:{
jj_consume_token(COMMA);
break;
}
case AT:{
object = Object();
database.addObject(object);
break;
}
default:
jj_la1[1] = jj_gen;
jj_consume_token(-1);
throw new ParseException();
}
}
jj_consume_token(0);
resolveCrossReferences();
setDatabase(null);
return database;
}
final private BibTeXObject Object() throws ParseException {BibTeXObject object;
if (jj_2_1(2147483647)) {
object = Comment();
} else if (jj_2_2(2147483647)) {
object = Include();
} else if (jj_2_3(2147483647)) {
object = Preamble();
} else if (jj_2_4(2147483647)) {
object = String();
} else {
switch ((jj_ntk==-1)?jj_ntk_f():jj_ntk) {
case AT:{
object = Entry();
break;
}
default:
jj_la1[2] = jj_gen;
jj_consume_token(-1);
throw new ParseException();
}
}
return object;
}
final private BibTeXComment Comment() throws ParseException {String string;
jj_consume_token(AT);
jj_consume_token(COMMENT);
jj_consume_token(LBRACE);
string = Literal(1, "}");
return new BibTeXComment(new StringValue(string, StringValue.Style.BRACED));
}
final private BibTeXInclude Include() throws ParseException {String string;
jj_consume_token(AT);
jj_consume_token(INCLUDE);
jj_consume_token(LBRACE);
string = Literal(1, "}");
BibTeXDatabase database;
try {
Reader reader = new FileReader(string);
try {
BibTeXParser parser = new BibTeXParser();
database = parser.parse(reader);
} finally {
reader.close();
}
} catch(Exception e){
{if (true) throw new ParseException(e.getMessage());}
}
return new BibTeXInclude(new StringValue(string, StringValue.Style.BRACED), database);
}
final private BibTeXPreamble Preamble() throws ParseException {Value value;
jj_consume_token(AT);
jj_consume_token(PREAMBLE);
switch ((jj_ntk==-1)?jj_ntk_f():jj_ntk) {
case LPAREN:{
jj_consume_token(LPAREN);
value = Value();
jj_consume_token(RPAREN);
break;
}
case LBRACE:{
jj_consume_token(LBRACE);
value = Value();
jj_consume_token(RBRACE);
break;
}
default:
jj_la1[3] = jj_gen;
jj_consume_token(-1);
throw new ParseException();
}
return new BibTeXPreamble(value);
}
final private BibTeXString String() throws ParseException {Field field;
jj_consume_token(AT);
jj_consume_token(STRING);
switch ((jj_ntk==-1)?jj_ntk_f():jj_ntk) {
case LPAREN:{
jj_consume_token(LPAREN);
field = Assignment();
jj_consume_token(RPAREN);
break;
}
case LBRACE:{
jj_consume_token(LBRACE);
field = Assignment();
jj_consume_token(RBRACE);
break;
}
default:
jj_la1[4] = jj_gen;
jj_consume_token(-1);
throw new ParseException();
}
return new BibTeXString(field.getKey(), field.getValue());
}
final private BibTeXEntry Entry() throws ParseException {Token type;
Token key = null;
List fields;
jj_consume_token(AT);
type = jj_consume_token(NAME);
switch ((jj_ntk==-1)?jj_ntk_f():jj_ntk) {
case LPAREN:{
jj_consume_token(LPAREN);
if (jj_2_5(2147483647)) {
key = Identifier();
jj_consume_token(COMMA);
fields = AssignmentList();
} else {
switch ((jj_ntk==-1)?jj_ntk_f():jj_ntk) {
case COMMA:
case COMMENT:
case INCLUDE:
case PREAMBLE:
case STRING:
case NAME:{
switch ((jj_ntk==-1)?jj_ntk_f():jj_ntk) {
case COMMA:{
jj_consume_token(COMMA);
break;
}
default:
jj_la1[5] = jj_gen;
;
}
fields = AssignmentList();
break;
}
default:
jj_la1[6] = jj_gen;
jj_consume_token(-1);
throw new ParseException();
}
}
switch ((jj_ntk==-1)?jj_ntk_f():jj_ntk) {
case COMMA:{
jj_consume_token(COMMA);
break;
}
default:
jj_la1[7] = jj_gen;
;
}
jj_consume_token(RPAREN);
break;
}
case LBRACE:{
jj_consume_token(LBRACE);
if (jj_2_6(2147483647)) {
key = Identifier();
jj_consume_token(COMMA);
fields = AssignmentList();
} else {
switch ((jj_ntk==-1)?jj_ntk_f():jj_ntk) {
case COMMA:
case COMMENT:
case INCLUDE:
case PREAMBLE:
case STRING:
case NAME:{
switch ((jj_ntk==-1)?jj_ntk_f():jj_ntk) {
case COMMA:{
jj_consume_token(COMMA);
break;
}
default:
jj_la1[8] = jj_gen;
;
}
fields = AssignmentList();
break;
}
default:
jj_la1[9] = jj_gen;
jj_consume_token(-1);
throw new ParseException();
}
}
switch ((jj_ntk==-1)?jj_ntk_f():jj_ntk) {
case COMMA:{
jj_consume_token(COMMA);
break;
}
default:
jj_la1[10] = jj_gen;
;
}
jj_consume_token(RBRACE);
break;
}
default:
jj_la1[11] = jj_gen;
jj_consume_token(-1);
throw new ParseException();
}
BibTeXEntry entry = new BibTeXEntry(new Key(type.image), key != null ? new Key(key.image) : new Key(nextKey()));
for(Field field : fields){
entry.addField(field.getKey(), field.getValue());
}
return entry;
}
final private Field Assignment() throws ParseException {Key key;
Value value;
key = Key();
jj_consume_token(EQUALS);
value = Value();
return new Field(key, value);
}
final private List AssignmentList() throws ParseException {List fields = new ArrayList();
Field field;
field = Assignment();
fields.add(field);
label_2:
while (true) {
if (jj_2_7(2147483647)) {
;
} else {
break label_2;
}
jj_consume_token(COMMA);
field = Assignment();
fields.add(field);
}
return fields;
}
final private Token Identifier() throws ParseException {Token token;
token = Name();
return token;
}
final private Token Name() throws ParseException {Token token;
switch ((jj_ntk==-1)?jj_ntk_f():jj_ntk) {
case COMMENT:{
token = jj_consume_token(COMMENT);
break;
}
case INCLUDE:{
token = jj_consume_token(INCLUDE);
break;
}
case PREAMBLE:{
token = jj_consume_token(PREAMBLE);
break;
}
case STRING:{
token = jj_consume_token(STRING);
break;
}
case NAME:{
token = jj_consume_token(NAME);
break;
}
default:
jj_la1[12] = jj_gen;
jj_consume_token(-1);
throw new ParseException();
}
return token;
}
final private Key Key() throws ParseException {Token token;
token = Name();
return new Key(token.image);
}
final private Value Value() throws ParseException {Value left;
Value right = null;
left = SimpleValue();
switch ((jj_ntk==-1)?jj_ntk_f():jj_ntk) {
case HASH:{
jj_consume_token(HASH);
right = Value();
break;
}
default:
jj_la1[13] = jj_gen;
;
}
if(right != null){
return new ConcateValue(left, right);
}
return left;
}
final private Value SimpleValue() throws ParseException {String string;
Token token;
Value result = null;
switch ((jj_ntk==-1)?jj_ntk_f():jj_ntk) {
case LBRACE:{
jj_consume_token(LBRACE);
string = Literal(1, "}");
result = new StringValue(string, StringValue.Style.BRACED);
break;
}
case QUOTE:{
jj_consume_token(QUOTE);
string = Literal(0, "\"");
result = new StringValue(string, StringValue.Style.QUOTED);
break;
}
case COMMENT:
case INCLUDE:
case PREAMBLE:
case STRING:
case NAME:{
token = Name();
boolean digits = isDigitString(token.image);
if(!digits){
KeyValue value = new KeyValue(token.image);
Key key = value.toKey();
BibTeXString object = getDatabase().resolveString(key);
if(object == null){
object = (BibTeXParser.getMacros()).get(key);
}
checkStringResolution(key, object);
result = new ReferenceValue(value, object);
} else
{
result = new DigitStringValue(token.image);
}
break;
}
default:
jj_la1[14] = jj_gen;
jj_consume_token(-1);
throw new ParseException();
}
if(result == null){
{if (true) throw new ParseException();}
}
return result;
}
private String Literal(int braceLevel, String delimiter) throws ParseException, ParseException {StringBuilder sb = new StringBuilder(64);
if(braceLevel < 0){
throw new IllegalArgumentException();
}
token_source.SwitchTo(IN_LITERAL);
for(Token prevToken = null, token = getNextToken(); true; prevToken = token, token = getNextToken()){
if(token.kind == BibTeXParserConstants.EOF){
throw new ParseException();
}
boolean escaped = (prevToken != null && "\\".equals(prevToken.image));
if(!escaped){
if("{".equals(token.image)){
braceLevel++;
} else
if("}".equals(token.image)){
braceLevel--;
}
}// End if
if(delimiter.equals(token.image) && braceLevel == 0){
break;
}
sb.append(token.image);
}
token_source.SwitchTo(DEFAULT);
return StringUtil.removeIndent(sb.toString());
}
private boolean jj_2_1(int xla)
{
jj_la = xla; jj_lastpos = jj_scanpos = token;
try { return !jj_3_1(); }
catch(LookaheadSuccess ls) { return true; }
finally { jj_save(0, xla); }
}
private boolean jj_2_2(int xla)
{
jj_la = xla; jj_lastpos = jj_scanpos = token;
try { return !jj_3_2(); }
catch(LookaheadSuccess ls) { return true; }
finally { jj_save(1, xla); }
}
private boolean jj_2_3(int xla)
{
jj_la = xla; jj_lastpos = jj_scanpos = token;
try { return !jj_3_3(); }
catch(LookaheadSuccess ls) { return true; }
finally { jj_save(2, xla); }
}
private boolean jj_2_4(int xla)
{
jj_la = xla; jj_lastpos = jj_scanpos = token;
try { return !jj_3_4(); }
catch(LookaheadSuccess ls) { return true; }
finally { jj_save(3, xla); }
}
private boolean jj_2_5(int xla)
{
jj_la = xla; jj_lastpos = jj_scanpos = token;
try { return !jj_3_5(); }
catch(LookaheadSuccess ls) { return true; }
finally { jj_save(4, xla); }
}
private boolean jj_2_6(int xla)
{
jj_la = xla; jj_lastpos = jj_scanpos = token;
try { return !jj_3_6(); }
catch(LookaheadSuccess ls) { return true; }
finally { jj_save(5, xla); }
}
private boolean jj_2_7(int xla)
{
jj_la = xla; jj_lastpos = jj_scanpos = token;
try { return !jj_3_7(); }
catch(LookaheadSuccess ls) { return true; }
finally { jj_save(6, xla); }
}
private boolean jj_3_7()
{
if (jj_scan_token(COMMA)) return true;
if (jj_3R_4()) return true;
return false;
}
private boolean jj_3_6()
{
if (jj_3R_3()) return true;
if (jj_scan_token(COMMA)) return true;
return false;
}
private boolean jj_3_4()
{
if (jj_scan_token(AT)) return true;
if (jj_scan_token(STRING)) return true;
return false;
}
private boolean jj_3R_4()
{
Token xsp;
xsp = jj_scanpos;
if (jj_scan_token(20)) {
jj_scanpos = xsp;
if (jj_scan_token(21)) {
jj_scanpos = xsp;
if (jj_scan_token(22)) {
jj_scanpos = xsp;
if (jj_scan_token(23)) {
jj_scanpos = xsp;
if (jj_scan_token(24)) return true;
}
}
}
}
return false;
}
private boolean jj_3_3()
{
if (jj_scan_token(AT)) return true;
if (jj_scan_token(PREAMBLE)) return true;
return false;
}
private boolean jj_3_5()
{
if (jj_3R_3()) return true;
if (jj_scan_token(COMMA)) return true;
return false;
}
private boolean jj_3_2()
{
if (jj_scan_token(AT)) return true;
if (jj_scan_token(INCLUDE)) return true;
return false;
}
private boolean jj_3_1()
{
if (jj_scan_token(AT)) return true;
if (jj_scan_token(COMMENT)) return true;
return false;
}
private boolean jj_3R_3()
{
if (jj_3R_4()) return true;
return false;
}
/** Generated Token Manager. */
public BibTeXParserTokenManager token_source;
SimpleCharStream jj_input_stream;
/** Current token. */
public Token token;
/** Next token. */
public Token jj_nt;
private int jj_ntk;
private Token jj_scanpos, jj_lastpos;
private int jj_la;
private int jj_gen;
final private int[] jj_la1 = new int[15];
static private int[] jj_la1_0;
static {
jj_la1_init_0();
}
private static void jj_la1_init_0() {
jj_la1_0 = new int[] {0x1800,0x1800,0x800,0x18000,0x18000,0x1000,0x1f01000,0x1000,0x1000,0x1f01000,0x1000,0x18000,0x1f00000,0x4000,0x1f28000,};
}
final private JJCalls[] jj_2_rtns = new JJCalls[7];
private boolean jj_rescan = false;
private int jj_gc = 0;
/** Constructor. */
public BibTeXParser(Provider stream) {
jj_input_stream = new SimpleCharStream(stream, 1, 1);
token_source = new BibTeXParserTokenManager(jj_input_stream);
token = new Token();
jj_ntk = -1;
jj_gen = 0;
for (int i = 0; i < 15; i++) jj_la1[i] = -1;
for (int i = 0; i < jj_2_rtns.length; i++) jj_2_rtns[i] = new JJCalls();
}
/** Constructor. */
public BibTeXParser(String dsl) throws ParseException, TokenMgrException {
this(new StringProvider(dsl));
}
public void ReInit(String s) {
ReInit(new StringProvider(s));
}
/** Reinitialise. */
public void ReInit(Provider stream) {
if (jj_input_stream == null) {
jj_input_stream = new SimpleCharStream(stream, 1, 1);
} else {
jj_input_stream.ReInit(stream, 1, 1);
}
if (token_source == null) {
token_source = new BibTeXParserTokenManager(jj_input_stream);
}
token_source.ReInit(jj_input_stream);
token = new Token();
jj_ntk = -1;
jj_gen = 0;
for (int i = 0; i < 15; i++) jj_la1[i] = -1;
for (int i = 0; i < jj_2_rtns.length; i++) jj_2_rtns[i] = new JJCalls();
}
/** Constructor with generated Token Manager. */
public BibTeXParser(BibTeXParserTokenManager tm) {
token_source = tm;
token = new Token();
jj_ntk = -1;
jj_gen = 0;
for (int i = 0; i < 15; i++) jj_la1[i] = -1;
for (int i = 0; i < jj_2_rtns.length; i++) jj_2_rtns[i] = new JJCalls();
}
/** Reinitialise. */
public void ReInit(BibTeXParserTokenManager tm) {
token_source = tm;
token = new Token();
jj_ntk = -1;
jj_gen = 0;
for (int i = 0; i < 15; i++) jj_la1[i] = -1;
for (int i = 0; i < jj_2_rtns.length; i++) jj_2_rtns[i] = new JJCalls();
}
private Token jj_consume_token(int kind) throws ParseException {
Token oldToken;
if ((oldToken = token).next != null) token = token.next;
else token = token.next = token_source.getNextToken();
jj_ntk = -1;
if (token.kind == kind) {
jj_gen++;
if (++jj_gc > 100) {
jj_gc = 0;
for (int i = 0; i < jj_2_rtns.length; i++) {
JJCalls c = jj_2_rtns[i];
while (c != null) {
if (c.gen < jj_gen) c.first = null;
c = c.next;
}
}
}
return token;
}
token = oldToken;
jj_kind = kind;
throw generateParseException();
}
@SuppressWarnings("serial")
static private final class LookaheadSuccess extends java.lang.RuntimeException { }
final private LookaheadSuccess jj_ls = new LookaheadSuccess();
private boolean jj_scan_token(int kind) {
if (jj_scanpos == jj_lastpos) {
jj_la--;
if (jj_scanpos.next == null) {
jj_lastpos = jj_scanpos = jj_scanpos.next = token_source.getNextToken();
} else {
jj_lastpos = jj_scanpos = jj_scanpos.next;
}
} else {
jj_scanpos = jj_scanpos.next;
}
if (jj_rescan) {
int i = 0; Token tok = token;
while (tok != null && tok != jj_scanpos) { i++; tok = tok.next; }
if (tok != null) jj_add_error_token(kind, i);
}
if (jj_scanpos.kind != kind) return true;
if (jj_la == 0 && jj_scanpos == jj_lastpos) throw jj_ls;
return false;
}
/** Get the next Token. */
final public Token getNextToken() {
if (token.next != null) token = token.next;
else token = token.next = token_source.getNextToken();
jj_ntk = -1;
jj_gen++;
return token;
}
/** Get the specific Token. */
final public Token getToken(int index) {
Token t = token;
for (int i = 0; i < index; i++) {
if (t.next != null) t = t.next;
else t = t.next = token_source.getNextToken();
}
return t;
}
private int jj_ntk_f() {
if ((jj_nt=token.next) == null)
return (jj_ntk = (token.next=token_source.getNextToken()).kind);
else
return (jj_ntk = jj_nt.kind);
}
private java.util.List jj_expentries = new java.util.ArrayList();
private int[] jj_expentry;
private int jj_kind = -1;
private int[] jj_lasttokens = new int[100];
private int jj_endpos;
private void jj_add_error_token(int kind, int pos) {
if (pos >= 100) {
return;
}
if (pos == jj_endpos + 1) {
jj_lasttokens[jj_endpos++] = kind;
} else if (jj_endpos != 0) {
jj_expentry = new int[jj_endpos];
for (int i = 0; i < jj_endpos; i++) {
jj_expentry[i] = jj_lasttokens[i];
}
for (int[] oldentry : jj_expentries) {
if (oldentry.length == jj_expentry.length) {
boolean isMatched = true;
for (int i = 0; i < jj_expentry.length; i++) {
if (oldentry[i] != jj_expentry[i]) {
isMatched = false;
break;
}
}
if (isMatched) {
jj_expentries.add(jj_expentry);
break;
}
}
}
if (pos != 0) {
jj_lasttokens[(jj_endpos = pos) - 1] = kind;
}
}
}
/** Generate ParseException. */
public ParseException generateParseException() {
jj_expentries.clear();
boolean[] la1tokens = new boolean[31];
if (jj_kind >= 0) {
la1tokens[jj_kind] = true;
jj_kind = -1;
}
for (int i = 0; i < 15; i++) {
if (jj_la1[i] == jj_gen) {
for (int j = 0; j < 32; j++) {
if ((jj_la1_0[i] & (1< jj_gen) {
jj_la = p.arg; jj_lastpos = jj_scanpos = p.first;
switch (i) {
case 0: jj_3_1(); break;
case 1: jj_3_2(); break;
case 2: jj_3_3(); break;
case 3: jj_3_4(); break;
case 4: jj_3_5(); break;
case 5: jj_3_6(); break;
case 6: jj_3_7(); break;
}
}
p = p.next;
} while (p != null);
} catch(LookaheadSuccess ls) { }
}
jj_rescan = false;
}
private void jj_save(int index, int xla) {
JJCalls p = jj_2_rtns[index];
while (p.gen > jj_gen) {
if (p.next == null) { p = p.next = new JJCalls(); break; }
p = p.next;
}
p.gen = jj_gen + xla - jj_la;
p.first = token;
p.arg = xla;
}
static final class JJCalls {
int gen;
Token first;
int arg;
JJCalls next;
}
}
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