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/*
* This file is part of GraphStream .
*
* GraphStream is a library whose purpose is to handle static or dynamic
* graph, create them from scratch, file or any source and display them.
*
* This program is free software distributed under the terms of two licenses, the
* CeCILL-C license that fits European law, and the GNU Lesser General Public
* License. You can use, modify and/ or redistribute the software under the terms
* of the CeCILL-C license as circulated by CEA, CNRS and INRIA at the following
* URL or under the terms of the GNU LGPL as published by
* the Free Software Foundation, either version 3 of the License, or (at your
* option) any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
* PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see .
*
* The fact that you are presently reading this means that you have had
* knowledge of the CeCILL-C and LGPL licenses and that you accept their terms.
*/
/**
* @since 2011-07-04
*
* @author Antoine Dutot
* @author Guilhelm Savin
* @author Hicham Brahimi
*/
package org.graphstream.stream.file.gml;
import java.io.InputStream;
import java.io.IOException;
import java.io.Reader;
import org.graphstream.stream.file.FileSourceGML;
import org.graphstream.util.parser.ParseException;
import org.graphstream.util.parser.Parser;
import org.graphstream.util.parser.SimpleCharStream;
import org.graphstream.util.parser.Token;
import org.graphstream.util.parser.TokenMgrError;
@SuppressWarnings("unused")
public class GMLParser implements Parser, GMLParserConstants {
boolean inGraph = false;
GMLContext ctx;
boolean step;
public GMLParser(FileSourceGML gml, InputStream stream) {
this(stream);
this.ctx = new GMLContext(gml);
}
public GMLParser(FileSourceGML gml, Reader stream) {
this(stream);
this.ctx = new GMLContext(gml);
}
public boolean isInGraph() {
return inGraph;
}
public void open() throws IOException, ParseException {
}
public boolean next() throws IOException, ParseException {
KeyValues kv = null;
kv = nextEvents();
ctx.handleKeyValues(kv);
return (kv != null);
}
public boolean step() throws IOException, ParseException {
KeyValues kv = null;
step = false;
while ((kv = nextEvents()) != null && !step)
ctx.handleKeyValues(kv);
if (kv != null)
ctx.setNextStep(kv);
return (kv != null);
}
/**
* Closes the parser, closing the opened stream.
*/
public void close() throws IOException {
jj_input_stream.close();
}
/*****************************************************************/
/* The parser. */
/*****************************************************************/
/** Unused rule, call it to slurp in the whole file. */
final public void start() throws ParseException {
list();
}
final public void all() throws ParseException, IOException {
KeyValues values = new KeyValues();
String key;
switch ((jj_ntk == -1) ? jj_ntk() : jj_ntk) {
case GRAPH:
graphStart();
ctx.setIsInGraph(true);
ctx.setDirected(false);
break;
case DIGRAPH:
diGraphStart();
ctx.setIsInGraph(true);
ctx.setDirected(true);
break;
default:
jj_la1[0] = jj_gen;
jj_consume_token(-1);
throw new ParseException();
}
label_1: while (true) {
switch ((jj_ntk == -1) ? jj_ntk() : jj_ntk) {
case STRING:
case KEY:
case COMMENT:
;
break;
default:
jj_la1[1] = jj_gen;
break label_1;
}
key = keyValue(values);
values.key = key;
ctx.handleKeyValues(values);
values.clear();
}
graphEnd();
values.key = null;
inGraph = false;
jj_consume_token(0);
}
final public void graphStart() throws ParseException {
jj_consume_token(GRAPH);
jj_consume_token(LSQBR);
}
final public void diGraphStart() throws ParseException {
jj_consume_token(DIGRAPH);
jj_consume_token(LSQBR);
}
final public void graphEnd() throws ParseException {
jj_consume_token(RSQBR);
}
/**
* The top-level method to be called by the file source. Returns a set of
* top-level key values or null if the end of the file was reached.
*
* Top-level key values are nodes and edges as well as all key-values defined
* before and after the graph.
*/
final public KeyValues nextEvents() throws ParseException {
KeyValues values = new KeyValues();
String key;
switch ((jj_ntk == -1) ? jj_ntk() : jj_ntk) {
case GRAPH:
graphStart();
values.key = null;
ctx.setIsInGraph(true);
ctx.setDirected(false);
break;
case DIGRAPH:
diGraphStart();
values.key = null;
ctx.setIsInGraph(true);
ctx.setDirected(true);
break;
case RSQBR:
graphEnd();
values.key = null;
ctx.setIsInGraph(false);
break;
case STRING:
case KEY:
case COMMENT:
key = keyValue(values);
values.key = key;
break;
case 0:
jj_consume_token(0);
values = null;
break;
default:
jj_la1[2] = jj_gen;
jj_consume_token(-1);
throw new ParseException();
}
{
if (true)
return values;
}
throw new Error("Missing return statement in function");
}
/**
* A list of key values, all values are stored in a KeyValues object.
*/
final public KeyValues list() throws ParseException {
KeyValues values = new KeyValues();
label_2: while (true) {
switch ((jj_ntk == -1) ? jj_ntk() : jj_ntk) {
case STRING:
case KEY:
case COMMENT:
;
break;
default:
jj_la1[3] = jj_gen;
break label_2;
}
keyValue(values);
}
{
if (true)
return values;
}
throw new Error("Missing return statement in function");
}
/**
* A set of key and value, the value can recursively be a list of key-values.
* Only the key-value list "graph [ ... ]" is not parsed by this rule, and
* parsed by another rules, so that the nextEvent() rule can be called
* repeatedly.
*/
final public String keyValue(KeyValues values) throws ParseException {
Token k;
String key;
Object v;
boolean isGraph = false;
label_3: while (true) {
switch ((jj_ntk == -1) ? jj_ntk() : jj_ntk) {
case COMMENT:
;
break;
default:
jj_la1[4] = jj_gen;
break label_3;
}
jj_consume_token(COMMENT);
}
switch ((jj_ntk == -1) ? jj_ntk() : jj_ntk) {
case KEY:
k = jj_consume_token(KEY);
key = k.image;
if (key.equalsIgnoreCase("step"))
step = true;
break;
case STRING:
k = jj_consume_token(STRING);
key = k.image.substring(1, k.image.length() - 2);
break;
default:
jj_la1[5] = jj_gen;
jj_consume_token(-1);
throw new ParseException();
}
v = value(key);
values.put(key, v);
values.line = k.beginLine;
values.column = k.beginColumn;
{
if (true)
return key;
}
throw new Error("Missing return statement in function");
}
/**
* A value for a key, either a number, a string or a recursive list of
* key-values.
*/
final public Object value(String key) throws ParseException {
Token t;
Object val;
KeyValues kv;
switch ((jj_ntk == -1) ? jj_ntk() : jj_ntk) {
case REAL:
t = jj_consume_token(REAL);
if (t.image.indexOf('.') < 0)
val = Integer.valueOf(t.image);
else
val = Double.valueOf(t.image);
break;
case STRING:
t = jj_consume_token(STRING);
val = t.image.substring(1, t.image.length() - 1);
break;
case KEY:
t = jj_consume_token(KEY);
val = t.image;
break;
case LSQBR:
jj_consume_token(LSQBR);
kv = list();
val = kv;
jj_consume_token(RSQBR);
break;
default:
jj_la1[6] = jj_gen;
jj_consume_token(-1);
throw new ParseException();
}
{
if (true)
return val;
}
throw new Error("Missing return statement in function");
}
/** Generated Token Manager. */
public GMLParserTokenManager token_source;
SimpleCharStream jj_input_stream;
/** Current token. */
public Token token;
/** Next token. */
public Token jj_nt;
private int jj_ntk;
private int jj_gen;
final private int[] jj_la1 = new int[7];
static private int[] jj_la1_0;
static {
jj_la1_init_0();
}
private static void jj_la1_init_0() {
jj_la1_0 = new int[] { 0x3000, 0xc800, 0xfa01, 0xc800, 0x8000, 0x4800, 0x4d00, };
}
/** Constructor with InputStream. */
public GMLParser(java.io.InputStream stream) {
this(stream, null);
}
/** Constructor with InputStream and supplied encoding */
public GMLParser(java.io.InputStream stream, String encoding) {
try {
jj_input_stream = new SimpleCharStream(stream, encoding, 1, 1);
} catch (java.io.UnsupportedEncodingException e) {
throw new RuntimeException(e);
}
token_source = new GMLParserTokenManager(jj_input_stream);
token = new Token();
jj_ntk = -1;
jj_gen = 0;
for (int i = 0; i < 7; i++)
jj_la1[i] = -1;
}
/** Reinitialise. */
public void ReInit(java.io.InputStream stream) {
ReInit(stream, null);
}
/** Reinitialise. */
public void ReInit(java.io.InputStream stream, String encoding) {
try {
jj_input_stream.ReInit(stream, encoding, 1, 1);
} catch (java.io.UnsupportedEncodingException e) {
throw new RuntimeException(e);
}
token_source.ReInit(jj_input_stream);
token = new Token();
jj_ntk = -1;
jj_gen = 0;
for (int i = 0; i < 7; i++)
jj_la1[i] = -1;
}
/** Constructor. */
public GMLParser(java.io.Reader stream) {
jj_input_stream = new SimpleCharStream(stream, 1, 1);
token_source = new GMLParserTokenManager(jj_input_stream);
token = new Token();
jj_ntk = -1;
jj_gen = 0;
for (int i = 0; i < 7; i++)
jj_la1[i] = -1;
}
/** Reinitialise. */
public void ReInit(java.io.Reader stream) {
jj_input_stream.ReInit(stream, 1, 1);
token_source.ReInit(jj_input_stream);
token = new Token();
jj_ntk = -1;
jj_gen = 0;
for (int i = 0; i < 7; i++)
jj_la1[i] = -1;
}
/** Constructor with generated Token Manager. */
public GMLParser(GMLParserTokenManager tm) {
token_source = tm;
token = new Token();
jj_ntk = -1;
jj_gen = 0;
for (int i = 0; i < 7; i++)
jj_la1[i] = -1;
}
/** Reinitialise. */
public void ReInit(GMLParserTokenManager tm) {
token_source = tm;
token = new Token();
jj_ntk = -1;
jj_gen = 0;
for (int i = 0; i < 7; i++)
jj_la1[i] = -1;
}
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++;
return token;
}
token = oldToken;
jj_kind = kind;
throw generateParseException();
}
/** 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() {
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;
/** Generate ParseException. */
public ParseException generateParseException() {
jj_expentries.clear();
boolean[] la1tokens = new boolean[16];
if (jj_kind >= 0) {
la1tokens[jj_kind] = true;
jj_kind = -1;
}
for (int i = 0; i < 7; i++) {
if (jj_la1[i] == jj_gen) {
for (int j = 0; j < 32; j++) {
if ((jj_la1_0[i] & (1 << j)) != 0) {
la1tokens[j] = true;
}
}
}
}
for (int i = 0; i < 16; i++) {
if (la1tokens[i]) {
jj_expentry = new int[1];
jj_expentry[0] = i;
jj_expentries.add(jj_expentry);
}
}
int[][] exptokseq = new int[jj_expentries.size()][];
for (int i = 0; i < jj_expentries.size(); i++) {
exptokseq[i] = jj_expentries.get(i);
}
return new ParseException(token, exptokseq, tokenImage);
}
/** Enable tracing. */
final public void enable_tracing() {
}
/** Disable tracing. */
final public void disable_tracing() {
}
}
