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org.xbib.datastructures.json.simple.JSONParser Maven / Gradle / Ivy
package org.xbib.datastructures.json.simple;
import java.io.IOException;
import java.io.Reader;
import java.io.StringReader;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
@SuppressWarnings({"hiding", "rawtypes", "unchecked"})
public class JSONParser {
public static final int S_INIT = 0;
public static final int S_IN_FINISHED_VALUE = 1;
public static final int S_IN_OBJECT = 2;
public static final int S_IN_ARRAY = 3;
public static final int S_PASSED_PAIR_KEY = 4;
public static final int S_IN_PAIR_VALUE = 5;
public static final int S_END = 6;
public static final int S_IN_ERROR = -1;
private LinkedList handlerStatusStack;
private final Yylex lexer = new Yylex((Reader) null);
private Yytoken token = null;
private int status = S_INIT;
private int peekStatus(LinkedList statusStack) {
if (statusStack.size() == 0) {
return -1;
}
return (Integer) statusStack.getFirst();
}
public void reset() {
token = null;
status = S_INIT;
handlerStatusStack = null;
}
public void reset(Reader in) {
lexer.yyreset(in);
reset();
}
public int getPosition() {
return lexer.getPosition();
}
public Object parse(String s) throws ParseException {
return parse(s, (ContainerFactory) null);
}
public Object parse(String s, ContainerFactory containerFactory) throws ParseException {
StringReader in = new StringReader(s);
try {
return parse(in, containerFactory);
} catch (IOException ie) {
throw new ParseException(-1, ParseException.ERROR_UNEXPECTED_EXCEPTION, ie);
}
}
public Object parse(Reader in) throws IOException, ParseException {
return parse(in, (ContainerFactory) null);
}
public Object parse(Reader in, ContainerFactory containerFactory) throws IOException, ParseException {
reset(in);
LinkedList statusStack = new LinkedList();
LinkedList valueStack = new LinkedList();
try {
do {
nextToken();
switch (status) {
case S_INIT:
switch (token.type) {
case Yytoken.TYPE_VALUE:
status = S_IN_FINISHED_VALUE;
statusStack.addFirst(status);
valueStack.addFirst(token.value);
break;
case Yytoken.TYPE_LEFT_BRACE:
status = S_IN_OBJECT;
statusStack.addFirst(status);
valueStack.addFirst(createObjectContainer(containerFactory));
break;
case Yytoken.TYPE_LEFT_SQUARE:
status = S_IN_ARRAY;
statusStack.addFirst(status);
valueStack.addFirst(createArrayContainer(containerFactory));
break;
default:
status = S_IN_ERROR;
}
break;
case S_IN_FINISHED_VALUE:
if (token.type == Yytoken.TYPE_EOF) {
return valueStack.removeFirst();
} else {
throw new ParseException(getPosition(), ParseException.ERROR_UNEXPECTED_TOKEN, token);
}
case S_IN_OBJECT:
switch (token.type) {
case Yytoken.TYPE_COMMA:
break;
case Yytoken.TYPE_VALUE:
if (token.value instanceof String) {
String key = (String) token.value;
valueStack.addFirst(key);
status = S_PASSED_PAIR_KEY;
statusStack.addFirst(status);
} else {
status = S_IN_ERROR;
}
break;
case Yytoken.TYPE_RIGHT_BRACE:
if (valueStack.size() > 1) {
statusStack.removeFirst();
valueStack.removeFirst();
status = peekStatus(statusStack);
} else {
status = S_IN_FINISHED_VALUE;
}
break;
default:
status = S_IN_ERROR;
break;
}
break;
case S_PASSED_PAIR_KEY:
switch (token.type) {
case Yytoken.TYPE_COLON:
break;
case Yytoken.TYPE_VALUE:
statusStack.removeFirst();
String key = (String) valueStack.removeFirst();
Map parent = (Map) valueStack.getFirst();
parent.put(key, token.value);
status = peekStatus(statusStack);
break;
case Yytoken.TYPE_LEFT_SQUARE:
statusStack.removeFirst();
key = (String) valueStack.removeFirst();
parent = (Map) valueStack.getFirst();
List newArray = createArrayContainer(containerFactory);
parent.put(key, newArray);
status = S_IN_ARRAY;
statusStack.addFirst(status);
valueStack.addFirst(newArray);
break;
case Yytoken.TYPE_LEFT_BRACE:
statusStack.removeFirst();
key = (String) valueStack.removeFirst();
parent = (Map) valueStack.getFirst();
Map newObject = createObjectContainer(containerFactory);
parent.put(key, newObject);
status = S_IN_OBJECT;
statusStack.addFirst(status);
valueStack.addFirst(newObject);
break;
default:
status = S_IN_ERROR;
}
break;
case S_IN_ARRAY:
switch (token.type) {
case Yytoken.TYPE_COMMA:
break;
case Yytoken.TYPE_VALUE:
List val = (List) valueStack.getFirst();
val.add(token.value);
break;
case Yytoken.TYPE_RIGHT_SQUARE:
if (valueStack.size() > 1) {
statusStack.removeFirst();
valueStack.removeFirst();
status = peekStatus(statusStack);
} else {
status = S_IN_FINISHED_VALUE;
}
break;
case Yytoken.TYPE_LEFT_BRACE:
val = (List) valueStack.getFirst();
Map newObject = createObjectContainer(containerFactory);
val.add(newObject);
status = S_IN_OBJECT;
statusStack.addFirst(status);
valueStack.addFirst(newObject);
break;
case Yytoken.TYPE_LEFT_SQUARE:
val = (List) valueStack.getFirst();
List newArray = createArrayContainer(containerFactory);
val.add(newArray);
status = S_IN_ARRAY;
statusStack.addFirst(status);
valueStack.addFirst(newArray);
break;
default:
status = S_IN_ERROR;
}
break;
case S_IN_ERROR:
throw new ParseException(getPosition(), ParseException.ERROR_UNEXPECTED_TOKEN, token);
}
if (status == S_IN_ERROR) {
throw new ParseException(getPosition(), ParseException.ERROR_UNEXPECTED_TOKEN, token);
}
} while (token.type != Yytoken.TYPE_EOF);
} catch (IOException ie) {
throw ie;
}
throw new ParseException(getPosition(), ParseException.ERROR_UNEXPECTED_TOKEN, token);
}
private void nextToken() throws ParseException, IOException {
token = lexer.yylex();
if (token == null) {
token = new Yytoken(Yytoken.TYPE_EOF, null);
}
}
private Map createObjectContainer(ContainerFactory containerFactory) {
if (containerFactory == null) {
return new JSONObject();
}
Map m = containerFactory.createObjectContainer();
if (m == null) {
return new JSONObject();
}
return m;
}
private List createArrayContainer(ContainerFactory containerFactory) {
if (containerFactory == null) {
return new JSONArray();
}
List l = containerFactory.createArrayContainer();
if (l == null) {
return new JSONArray();
}
return l;
}
public void parse(String s, ContentHandler contentHandler) throws ParseException {
parse(s, contentHandler, false);
}
public void parse(String s, ContentHandler contentHandler, boolean isResume) throws ParseException {
StringReader in = new StringReader(s);
try {
parse(in, contentHandler, isResume);
} catch (IOException ie) {
throw new ParseException(-1, ParseException.ERROR_UNEXPECTED_EXCEPTION, ie);
}
}
public void parse(Reader in, ContentHandler contentHandler) throws IOException, ParseException {
parse(in, contentHandler, false);
}
public void parse(Reader in, ContentHandler contentHandler, boolean isResume) throws IOException, ParseException {
if (!isResume) {
reset(in);
handlerStatusStack = new LinkedList();
} else {
if (handlerStatusStack == null) {
reset(in);
handlerStatusStack = new LinkedList();
}
}
LinkedList statusStack = handlerStatusStack;
try {
do {
switch (status) {
case S_INIT:
contentHandler.startJSON();
nextToken();
switch (token.type) {
case Yytoken.TYPE_VALUE:
status = S_IN_FINISHED_VALUE;
statusStack.addFirst(status);
if (!contentHandler.primitive(token.value)) {
return;
}
break;
case Yytoken.TYPE_LEFT_BRACE:
status = S_IN_OBJECT;
statusStack.addFirst(status);
if (!contentHandler.startObject()) {
return;
}
break;
case Yytoken.TYPE_LEFT_SQUARE:
status = S_IN_ARRAY;
statusStack.addFirst(status);
if (!contentHandler.startArray()) {
return;
}
break;
default:
status = S_IN_ERROR;
}
break;
case S_IN_FINISHED_VALUE:
nextToken();
if (token.type == Yytoken.TYPE_EOF) {
contentHandler.endJSON();
status = S_END;
return;
} else {
status = S_IN_ERROR;
throw new ParseException(getPosition(), ParseException.ERROR_UNEXPECTED_TOKEN, token);
}
case S_IN_OBJECT:
nextToken();
switch (token.type) {
case Yytoken.TYPE_COMMA:
break;
case Yytoken.TYPE_VALUE:
if (token.value instanceof String) {
String key = (String) token.value;
status = S_PASSED_PAIR_KEY;
statusStack.addFirst(status);
if (!contentHandler.startObjectEntry(key)) {
return;
}
} else {
status = S_IN_ERROR;
}
break;
case Yytoken.TYPE_RIGHT_BRACE:
if (statusStack.size() > 1) {
statusStack.removeFirst();
status = peekStatus(statusStack);
} else {
status = S_IN_FINISHED_VALUE;
}
if (!contentHandler.endObject()) {
return;
}
break;
default:
status = S_IN_ERROR;
break;
}
break;
case S_PASSED_PAIR_KEY:
nextToken();
switch (token.type) {
case Yytoken.TYPE_COLON:
break;
case Yytoken.TYPE_VALUE:
statusStack.removeFirst();
status = peekStatus(statusStack);
if (!contentHandler.primitive(token.value)) {
return;
}
if (!contentHandler.endObjectEntry()) {
return;
}
break;
case Yytoken.TYPE_LEFT_SQUARE:
statusStack.removeFirst();
statusStack.addFirst(S_IN_PAIR_VALUE);
status = S_IN_ARRAY;
statusStack.addFirst(status);
if (!contentHandler.startArray()) {
return;
}
break;
case Yytoken.TYPE_LEFT_BRACE:
statusStack.removeFirst();
statusStack.addFirst(S_IN_PAIR_VALUE);
status = S_IN_OBJECT;
statusStack.addFirst(status);
if (!contentHandler.startObject()) {
return;
}
break;
default:
status = S_IN_ERROR;
}
break;
case S_IN_PAIR_VALUE:
statusStack.removeFirst();
status = peekStatus(statusStack);
if (!contentHandler.endObjectEntry()) {
return;
}
break;
case S_IN_ARRAY:
nextToken();
switch (token.type) {
case Yytoken.TYPE_COMMA:
break;
case Yytoken.TYPE_VALUE:
if (!contentHandler.primitive(token.value)) {
return;
}
break;
case Yytoken.TYPE_RIGHT_SQUARE:
if (statusStack.size() > 1) {
statusStack.removeFirst();
status = peekStatus(statusStack);
} else {
status = S_IN_FINISHED_VALUE;
}
if (!contentHandler.endArray()) {
return;
}
break;
case Yytoken.TYPE_LEFT_BRACE:
status = S_IN_OBJECT;
statusStack.addFirst(status);
if (!contentHandler.startObject()) {
return;
}
break;
case Yytoken.TYPE_LEFT_SQUARE:
status = S_IN_ARRAY;
statusStack.addFirst(status);
if (!contentHandler.startArray()) {
return;
}
break;
default:
status = S_IN_ERROR;
}
break;
case S_END:
return;
case S_IN_ERROR:
throw new ParseException(getPosition(), ParseException.ERROR_UNEXPECTED_TOKEN, token);
}
if (status == S_IN_ERROR) {
throw new ParseException(getPosition(), ParseException.ERROR_UNEXPECTED_TOKEN, token);
}
} while (token.type != Yytoken.TYPE_EOF);
} catch (IOException | ParseException | RuntimeException | Error ie) {
status = S_IN_ERROR;
throw ie;
}
status = S_IN_ERROR;
throw new ParseException(getPosition(), ParseException.ERROR_UNEXPECTED_TOKEN, token);
}
}
