Method fromStringSlow

server/src/main/java/org/elasticsearch/Version.java:395–440

(String version)

    }

    private static Version fromStringSlow(String version) {
        final boolean snapshot; // this is some BWC for 2.x and before indices
        if (snapshot = version.endsWith("-SNAPSHOT")) {
            version = version.substring(0, version.length() - 9);
        }
        String[] parts = version.split("[.-]");
        if (parts.length < 3 || parts.length > 4) {
            throw new IllegalArgumentException(
                    "the version needs to contain major, minor, and revision, and optionally the build: " + version);
        }

        try {
            final int rawMajor = Integer.parseInt(parts[0]);
            if (rawMajor >= 2 && snapshot) { // we don't support snapshot as part of the version here anymore
                throw new IllegalArgumentException("illegal version format - snapshots are only supported until version 2.x");
            }
            final int betaOffset = rawMajor < 2 ? 0 : 25;
            //we reverse the version id calculation based on some assumption as we can't reliably reverse the modulo
            final int major = rawMajor * 1000000;
            final int minor = Integer.parseInt(parts[1]) * 10000;
            final int revision = Integer.parseInt(parts[2]) * 100;


            int build = 99;
            if (parts.length == 4) {
                String buildStr = parts[3];
                if (buildStr.startsWith("alpha")) {
                    assert rawMajor >= 5 : "major must be >= 5 but was " + major;
                    build = Integer.parseInt(buildStr.substring(5));
                    assert build < 25 : "expected a beta build but " + build + " >= 25";
                } else if (buildStr.startsWith("Beta") || buildStr.startsWith("beta")) {
                    build = betaOffset + Integer.parseInt(buildStr.substring(4));
                    assert build < 50 : "expected a beta build but " + build + " >= 50";
                } else if (buildStr.startsWith("RC") || buildStr.startsWith("rc")) {
                    build = Integer.parseInt(buildStr.substring(2)) + 50;
                } else {
                    throw new IllegalArgumentException("unable to parse version " + version);
                }
            }

            return fromId(major + minor + revision + build + INTERNAL_OFFSET);

        } catch (NumberFormatException e) {
            throw new IllegalArgumentException("unable to parse version " + version, e);
        }
    }

    private final boolean isSnapshot;
    public final int externalId;