public Appendable append()

in juneau-core/juneau-marshall/src/main/java/org/apache/juneau/UriResolver.java [163:263]
85 lines of code
64 McCabe index (conditional complexity)

	public Appendable append(Appendable a, Object o) {

		try {
			String uri = stringify(o);
			uri = nullIfEmpty(uri);
			boolean needsNormalize = hasDotSegments(uri) && resolution != null;

			// Absolute paths are not changed.
			if (isAbsoluteUri(uri))
				return a.append(needsNormalize ? normalize(uri) : uri);
			if (resolution == NONE && ! isSpecialUri(uri))
				return a.append(emptyIfNull(uri));
			if (resolution == ROOT_RELATIVE && startsWith(uri, '/'))
				return a.append(needsNormalize ? normalize(uri) : uri);

			Appendable a2 = needsNormalize ? new StringBuilder() : a;

			// Root-relative path
			if (startsWith(uri, '/')) {
				if (authority != null)
					a2.append(authority);
				if (uri.length() != 1)
					a2.append(uri);
				else if (authority == null)
					a2.append('/');
			}

			// Context-relative path
			else if (uri != null && uri.startsWith("context:/")) {
				if (resolution == ABSOLUTE && authority != null)
					a2.append(authority);
				if (contextRoot != null)
					a2.append('/').append(contextRoot);
				if (uri.length() > 9)
					a2.append('/').append(uri.substring(9));
				else if (contextRoot == null && (authority == null || resolution != ABSOLUTE))
					a2.append('/');
			}

			// Resource-relative path
			else if (uri != null && uri.startsWith("servlet:/")) {
				if (resolution == ABSOLUTE && authority != null)
					a2.append(authority);
				if (contextRoot != null)
					a2.append('/').append(contextRoot);
				if (servletPath != null)
					a2.append('/').append(servletPath);
				if (uri.length() > 9)
					a2.append('/').append(uri.substring(9));
				else if (servletPath == null && contextRoot == null && (authority == null || resolution != ABSOLUTE))
					a2.append('/');
			}

			// Request-relative path
			else if (uri != null && uri.startsWith("request:/")) {
				if (resolution == ABSOLUTE && authority != null)
					a2.append(authority);
				if (contextRoot != null)
					a2.append('/').append(contextRoot);
				if (servletPath != null)
					a2.append('/').append(servletPath);
				if (pathInfo != null)
					a2.append('/').append(pathInfo);
				if (uri.length() > 9)
					a2.append('/').append(uri.substring(9));
				else if (servletPath == null && contextRoot == null && pathInfo == null && (authority == null || resolution != ABSOLUTE))
					a2.append('/');
			}

			// Relative path
			else {
				if (resolution == ABSOLUTE && authority != null)
					a2.append(authority);
				if (contextRoot != null)
					a2.append('/').append(contextRoot);
				if (servletPath != null)
					a2.append('/').append(servletPath);
				if (relativity == RESOURCE && uri != null)
					a2.append('/').append(uri);
				else if (relativity == PATH_INFO) {
					if (uri == null) {
						if (pathInfo != null)
							a2.append('/').append(pathInfo);
					} else {
						if (parentPath != null)
							a2.append('/').append(parentPath);
						a2.append('/').append(uri);
					}
				}
				else if (uri == null && contextRoot == null && servletPath == null && (authority == null || resolution != ABSOLUTE))
					a2.append('/');
			}

			if (needsNormalize)
				a.append(normalize(a2.toString()));

			return a;
		} catch (IOException e) {
			throw asRuntimeException(e);
		}
	}