public T parseAnything()

in juneau-core/juneau-marshall/src/main/java/org/apache/juneau/uon/UonParserSession.java [301:453]
137 lines of code
51 McCabe index (conditional complexity)

	public <T> T parseAnything(ClassMeta<?> eType, UonReader r, Object outer, boolean isUrlParamValue, BeanPropertyMeta pMeta) throws IOException, ParseException, ExecutableException {

		if (eType == null)
			eType = object();
		ObjectSwap<T,Object> swap = (ObjectSwap<T,Object>)eType.getSwap(this);
		BuilderSwap<T,Object> builder = (BuilderSwap<T,Object>)eType.getBuilderSwap(this);
		ClassMeta<?> sType = null;
		if (builder != null)
			sType = builder.getBuilderClassMeta(this);
		else if (swap != null)
			sType = swap.getSwapClassMeta(this);
		else
			sType = eType;

		if (sType.isOptional())
			return (T)optional(parseAnything(eType.getElementType(), r, outer, isUrlParamValue, pMeta));

		setCurrentClass(sType);

		Object o = null;

		int c = r.peekSkipWs();

		if (c == -1 || c == AMP) {
			// If parameter is blank and it's an array or collection, return an empty list.
			if (sType.isCollectionOrArray())
				o = sType.newInstance();
			else if (sType.isString() || sType.isObject())
				o = "";
			else if (sType.isPrimitive())
				o = sType.getPrimitiveDefault();
			// Otherwise, leave null.
		} else if (sType.isVoid()) {
			String s = parseString(r, isUrlParamValue);
			if (s != null)
				throw new ParseException(this, "Expected ''null'' for void value, but was ''{0}''.", s);
		} else if (sType.isObject()) {
			if (c == '(') {
				JsonMap m = new JsonMap(this);
				parseIntoMap(r, m, string(), object(), pMeta);
				o = cast(m, pMeta, eType);
			} else if (c == '@') {
				Collection l = new JsonList(this);
				o = parseIntoCollection(r, l, sType, isUrlParamValue, pMeta);
			} else {
				String s = parseString(r, isUrlParamValue);
				if (c != '\'') {
					if ("true".equals(s) || "false".equals(s))
						o = Boolean.valueOf(s);
					else if (! "null".equals(s)) {
						if (isNumeric(s))
							o = StringUtils.parseNumber(s, Number.class);
						else
							o = s;
					}
				} else {
					o = s;
				}
			}
		} else if (sType.isBoolean()) {
			o = parseBoolean(r);
		} else if (sType.isCharSequence()) {
			o = parseString(r, isUrlParamValue);
		} else if (sType.isChar()) {
			o = parseCharacter(parseString(r, isUrlParamValue));
		} else if (sType.isNumber()) {
			o = parseNumber(r, (Class<? extends Number>)sType.getInnerClass());
		} else if (sType.isMap()) {
			Map m = (sType.canCreateNewInstance(outer) ? (Map)sType.newInstance(outer) : newGenericMap(sType));
			o = parseIntoMap(r, m, sType.getKeyType(), sType.getValueType(), pMeta);
		} else if (sType.isCollection()) {
			if (c == '(') {
				JsonMap m = new JsonMap(this);
				parseIntoMap(r, m, string(), object(), pMeta);
				// Handle case where it's a collection, but serialized as a map with a _type or _value key.
				if (m.containsKey(getBeanTypePropertyName(sType)))
					o = cast(m, pMeta, eType);
				// Handle case where it's a collection, but only a single value was specified.
				else {
					Collection l = (
						sType.canCreateNewInstance(outer)
						? (Collection)sType.newInstance(outer)
						: new JsonList(this)
					);
					l.add(m.cast(sType.getElementType()));
					o = l;
				}
			} else {
				Collection l = (
					sType.canCreateNewInstance(outer)
					? (Collection)sType.newInstance(outer)
					: new JsonList(this)
				);
				o = parseIntoCollection(r, l, sType, isUrlParamValue, pMeta);
			}
		} else if (builder != null) {
			BeanMap m = toBeanMap(builder.create(this, eType));
			m = parseIntoBeanMap(r, m);
			o = m == null ? null : builder.build(this, m.getBean(), eType);
		} else if (sType.canCreateNewBean(outer)) {
			BeanMap m = newBeanMap(outer, sType.getInnerClass());
			m = parseIntoBeanMap(r, m);
			o = m == null ? null : m.getBean();
		} else if (sType.canCreateNewInstanceFromString(outer)) {
			String s = parseString(r, isUrlParamValue);
			if (s != null)
				o = sType.newInstanceFromString(outer, s);
		} else if (sType.isArray() || sType.isArgs()) {
			if (c == '(') {
				JsonMap m = new JsonMap(this);
				parseIntoMap(r, m, string(), object(), pMeta);
				// Handle case where it's an array, but serialized as a map with a _type or _value key.
				if (m.containsKey(getBeanTypePropertyName(sType)))
					o = cast(m, pMeta, eType);
				// Handle case where it's an array, but only a single value was specified.
				else {
					ArrayList l = list(1);
					l.add(m.cast(sType.getElementType()));
					o = toArray(sType, l);
				}
			} else {
				ArrayList l = (ArrayList)parseIntoCollection(r, list(), sType, isUrlParamValue, pMeta);
				o = toArray(sType, l);
			}
		} else if (c == '(') {
			// It could be a non-bean with _type attribute.
			JsonMap m = new JsonMap(this);
			parseIntoMap(r, m, string(), object(), pMeta);
			if (m.containsKey(getBeanTypePropertyName(sType)))
				o = cast(m, pMeta, eType);
			else if (sType.getProxyInvocationHandler() != null)
				o = newBeanMap(outer, sType.getInnerClass()).load(m).getBean();
			else
				throw new ParseException(this, "Class ''{0}'' could not be instantiated.  Reason: ''{1}''",
					sType.getInnerClass().getName(), sType.getNotABeanReason());
		} else if (c == 'n') {
			r.read();
			parseNull(r);
		} else {
			throw new ParseException(this, "Class ''{0}'' could not be instantiated.  Reason: ''{1}''",
				sType.getInnerClass().getName(), sType.getNotABeanReason());
		}

		if (o == null && sType.isPrimitive())
			o = sType.getPrimitiveDefault();
		if (swap != null && o != null)
			o = unswap(swap, o, eType);

		if (outer != null)
			setParent(eType, o, outer);

		return (T)o;
	}