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/*
 * Copyright (c) 2003, PostgreSQL Global Development Group
 * See the LICENSE file in the project root for more information.
 */

package com.amazon.redshift.core;

import java.text.NumberFormat;
import java.text.ParsePosition;

/**
 * Enumeration for Redshift versions.
 */
public enum ServerVersion implements Version {

  INVALID("0.0.0"),
  v8_0("8.0.2"), // Redshift server version
  v8_2("8.2.0"),
  v8_3("8.3.0"),
  v8_4("8.4.0"),
  v9_0("9.0.0"),
  v9_1("9.1.0"),
  v9_2("9.2.0"),
  v9_3("9.3.0"),
  v9_4("9.4.0"),
  v9_5("9.5.0"),
  v9_6("9.6.0"),
  v10("10"),
  v11("11"),
  v12("12")
  ;

  private final int version;

  ServerVersion(String version) {
    this.version = parseServerVersionStr(version);
  }

  /**
   * Get a machine-readable version number.
   *
   * @return the version in numeric XXYYZZ form, e.g. 90401 for 9.4.1
   */
  @Override
  public int getVersionNum() {
    return version;
  }

  /**
   * 

Attempt to parse the server version string into an XXYYZZ form version number into a * {@link Version}.

* *

If the specified version cannot be parsed, the {@link Version#getVersionNum()} will return 0.

* * @param version version in numeric XXYYZZ form, e.g. "090401" for 9.4.1 * @return a {@link Version} representing the specified version string. */ public static Version from(String version) { final int versionNum = parseServerVersionStr(version); return new Version() { @Override public int getVersionNum() { return versionNum; } @Override public boolean equals(Object obj) { if (obj instanceof Version) { return this.getVersionNum() == ((Version) obj).getVersionNum(); } return false; } @Override public int hashCode() { return getVersionNum(); } @Override public String toString() { return Integer.toString(versionNum); } }; } /** *

Attempt to parse the server version string into an XXYYZZ form version number.

* *

Returns 0 if the version could not be parsed.

* *

Returns minor version 0 if the minor version could not be determined, e.g. devel or beta * releases.

* *

If a single major part like 90400 is passed, it's assumed to be a pre-parsed version and * returned verbatim. (Anything equal to or greater than 10000 is presumed to be this form).

* *

The yy or zz version parts may be larger than 99. A NumberFormatException is thrown if a * version part is out of range.

* * @param serverVersion server vertion in a XXYYZZ form * @return server version in number form */ static int parseServerVersionStr(String serverVersion) throws NumberFormatException { NumberFormat numformat = NumberFormat.getIntegerInstance(); numformat.setGroupingUsed(false); ParsePosition parsepos = new ParsePosition(0); if (serverVersion == null) { return 0; } int[] parts = new int[3]; int versionParts; for (versionParts = 0; versionParts < 3; versionParts++) { Number part = (Number) numformat.parseObject(serverVersion, parsepos); if (part == null) { break; } parts[versionParts] = part.intValue(); if (parsepos.getIndex() == serverVersion.length() || serverVersion.charAt(parsepos.getIndex()) != '.') { break; } // Skip . parsepos.setIndex(parsepos.getIndex() + 1); } versionParts++; if (parts[0] >= 10000) { /* * Redshift version 1000? I don't think so. We're seeing a version like 90401; return it * verbatim, but only if there's nothing else in the version. If there is, treat it as a parse * error. */ if (parsepos.getIndex() == serverVersion.length() && versionParts == 1) { return parts[0]; } else { throw new NumberFormatException( "First major-version part equal to or greater than 10000 in invalid version string: " + serverVersion); } } /* #667 - Allow for versions with greater than 3 parts. For versions with more than 3 parts, still return 3 parts (4th part ignored for now as no functionality is dependent on the 4th part . Allows for future versions of the server to utilize more than 3 part version numbers without upgrading the jdbc driver */ if (versionParts >= 3) { if (parts[1] > 99) { throw new NumberFormatException( "Unsupported second part of major version > 99 in invalid version string: " + serverVersion); } if (parts[2] > 99) { throw new NumberFormatException( "Unsupported second part of minor version > 99 in invalid version string: " + serverVersion); } return (parts[0] * 100 + parts[1]) * 100 + parts[2]; } if (versionParts == 2) { if (parts[0] >= 10) { return parts[0] * 100 * 100 + parts[1]; } if (parts[1] > 99) { throw new NumberFormatException( "Unsupported second part of major version > 99 in invalid version string: " + serverVersion); } return (parts[0] * 100 + parts[1]) * 100; } if (versionParts == 1) { if (parts[0] >= 10) { return parts[0] * 100 * 100; } } return 0; /* unknown */ } }




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