private BeanMap parseIntoBeanMap()

in juneau-core/juneau-marshall/src/main/java/org/apache/juneau/uon/UonParserSession.java [631:746]
112 lines of code
47 McCabe index (conditional complexity)

	private <T> BeanMap<T> parseIntoBeanMap(UonReader r, BeanMap<T> m) throws IOException, ParseException, ExecutableException {

		int c = r.readSkipWs();
		if (c == -1 || c == AMP)
			return null;
		if (c == 'n')
			return (BeanMap<T>)parseNull(r);
		if (c != '(')
			throw new ParseException(this, "Expected '(' at beginning of object.");

		final int S1=1; // Looking for attrName start.
		final int S2=2; // Found attrName end, looking for =.
		final int S3=3; // Found =, looking for valStart.
		final int S4=4; // Looking for , or }
		boolean isInEscape = false;

		int state = S1;
		String currAttr = "";
		mark();
		try {
			while (c != -1 && c != AMP) {
				c = r.read();
				if (! isInEscape) {
					if (state == S1) {
						if (c == ')' || c == -1 || c == AMP) {
							return m;
						}
						if (Character.isWhitespace(c))
							skipSpace(r);
						else {
							r.unread();
							mark();
							currAttr = parseAttrName(r, decoding);
							if (currAttr == null) { // Value was '%00'
								return null;
							}
							state = S2;
						}
					} else if (state == S2) {
						if (c == EQ || c == '=')
							state = S3;
						else if (c == -1 || c == ',' || c == ')' || c == AMP) {
							m.put(currAttr, null);
							if (c == ')' || c == -1 || c == AMP) {
								return m;
							}
							state = S1;
						}
					} else if (state == S3) {
						if (c == -1 || c == ',' || c == ')' || c == AMP) {
							if (! currAttr.equals(getBeanTypePropertyName(m.getClassMeta()))) {
								BeanPropertyMeta pMeta = m.getPropertyMeta(currAttr);
								if (pMeta == null) {
									onUnknownProperty(currAttr, m, null);
									unmark();
								} else {
									unmark();
									Object value = convertToType("", pMeta.getClassMeta());
									try {
										pMeta.set(m, currAttr, value);
									} catch (BeanRuntimeException e) {
										onBeanSetterException(pMeta, e);
										throw e;
									}
								}
							}
							if (c == -1 || c == ')' || c == AMP)
								return m;
							state = S1;
						} else {
							if (! currAttr.equals(getBeanTypePropertyName(m.getClassMeta()))) {
								BeanPropertyMeta pMeta = m.getPropertyMeta(currAttr);
								if (pMeta == null) {
									onUnknownProperty(currAttr, m, parseAnything(object(), r.unread(), m.getBean(false), false, null));
									unmark();
								} else {
									unmark();
									setCurrentProperty(pMeta);
									ClassMeta<?> cm = pMeta.getClassMeta();
									Object value = parseAnything(cm, r.unread(), m.getBean(false), false, pMeta);
									setName(cm, value, currAttr);
									try {
										pMeta.set(m, currAttr, value);
									} catch (BeanRuntimeException e) {
										onBeanSetterException(pMeta, e);
										throw e;
									}
									setCurrentProperty(null);
								}
							}
							state = S4;
						}
					} else if (state == S4) {
						if (c == ',')
							state = S1;
						else if (c == ')' || c == -1 || c == AMP) {
							return m;
						}
					}
				}
				isInEscape = isInEscape(c, r, isInEscape);
			}
			if (state == S1)
				throw new ParseException(this, "Could not find attribute name on object.");
			if (state == S2)
				throw new ParseException(this, "Could not find '=' following attribute name on object.");
			if (state == S3)
				throw new ParseException(this, "Could not find value following '=' on object.");
			if (state == S4)
				throw new ParseException(this, "Could not find ')' marking end of object.");
		} finally {
			unmark();
		}

		return null; // Unreachable.
	}