public String lookup()

in src/main/java/org/apache/commons/text/lookup/UrlStringLookup.java [62:91]

• 30 lines of code
• 5 McCabe index (conditional complexity)

    public String lookup(final String key) {
        if (key == null) {
            return null;
        }
        final String[] keys = key.split(SPLIT_STR);
        final int keyLen = keys.length;
        if (keyLen < 2) {
            throw IllegalArgumentExceptions.format("Bad URL key format [%s]; expected format is DocumentPath:Key.",
                key);
        }
        final String charsetName = keys[0];
        final String urlStr = StringUtils.substringAfter(key, SPLIT_CH);
        try {
            final URL url = new URL(urlStr);
            final int size = 8192;
            final StringWriter writer = new StringWriter(size);
            final char[] buffer = new char[size];
            try (BufferedInputStream bis = new BufferedInputStream(url.openStream());
                InputStreamReader reader = new InputStreamReader(bis, charsetName)) {
                int n;
                while (-1 != (n = reader.read(buffer))) {
                    writer.write(buffer, 0, n);
                }
            }
            return writer.toString();
        } catch (final Exception e) {
            throw IllegalArgumentExceptions.format(e, "Error looking up URL [%s] with Charset [%s].", urlStr,
                charsetName);
        }
    }