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EclipseLink build based upon Git transaction f2b9fc5
/*
* Copyright (c) 1998, 2020 Oracle and/or its affiliates. All rights reserved.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v. 2.0 which is available at
* http://www.eclipse.org/legal/epl-2.0,
* or the Eclipse Distribution License v. 1.0 which is available at
* http://www.eclipse.org/org/documents/edl-v10.php.
*
* SPDX-License-Identifier: EPL-2.0 OR BSD-3-Clause
*/
// Contributors:
// Tomas Kraus, Peter Benedikovic - initial API and implementation
package org.eclipse.persistence.internal.helper;
import java.util.HashMap;
import java.util.Map;
/**
* Java SE platforms supported by EclipseLink.
* @author Tomas Kraus, Peter Benedikovic
*/
public enum JavaSEPlatform implements Comparable {
/** Java SE 1.1. */
v1_1(1,1),
/** Java SE 1.2. */
v1_2(1,2),
/** Java SE 1.3. */
v1_3(1,3),
/** Java SE 1.4. */
v1_4(1,4),
/** Java SE 1.5. */
v1_5(1,5),
/** Java SE 1.6. */
v1_6(1,6),
/** Java SE 1.7. */
v1_7(1,7),
/** Java SE 1.8. */
v1_8(1,8),
/** Java SE 9. Version alias 1.9 is added too.*/
v9_0(9,0, new Version(1,9)),
/** Java SE 10. */
v10_0(10,0),
/** Java SE 11. */
v11_0(11,0),
/** Java SE 12. */
v12_0(12,0),
/** Java SE 13. */
v13_0(13,0),
/** Java SE 14. */
v14_0(14,0);
public static final class Version {
/**
* Creates an instance of Java SE version numbers.
* @param major major version number
* @param minor minor version number
*/
private Version(final int major, final int minor) {
this.major = major;
this.minor = minor;
}
/** Major version number. */
private final int major;
/** Minor version number. */
private final int minor;
/**
* Get major version number.
* @return Major version number.
*/
public int getMajor() {
return major;
}
/**
* Get minor version number.
* @return Minor version number.
*/
public int getMinor() {
return minor;
}
/**
* Return computer readable {@code String} containing version numbers in {@code '.' } format.
* @return computer readable {@code String} containing version numbers
*/
public String versionString() {
return JavaSEPlatform.versionString(major, minor);
}
// Currently this is identical with versionString() method.
/**
* Return version as human readable {@code String}.
* @return version as human readable {@code String}.
*/
@Override
public String toString() {
return JavaSEPlatform.versionString(major, minor);
}
}
/**
* Stored String values for backward String
* conversion.
*/
private static final Map stringValuesMap
= new HashMap<>(values().length);
// Initialize backward String conversion Map.
static {
for (JavaSEPlatform platform : JavaSEPlatform.values()) {
// Primary version numbers mapping.
stringValuesMap.put(platform.versionString(), platform);
// Additional version numbers mapping.
Version[] additional = platform.getAdditionalVersions();
if (additional != null) {
for (Version version : additional) {
stringValuesMap.put(version.versionString(), platform);
}
}
}
}
/** GlassFish Java SE platform enumeration length. */
public static final int LENGTH = JavaSEPlatform.values().length;
/** Lowest supported Java SE platform. Currently it's Java SE 1.8. */
public static final JavaSEPlatform MIN_SUPPORTED = v1_8;
/** Latest Java SE platform. This value is used when Java SE platform detection fails. */
static final JavaSEPlatform LATEST = JavaSEPlatform.v14_0;
/** Current Java SE platform. */
public static final JavaSEPlatform CURRENT
= JavaVersion.vmVersion().toPlatform();
/**
* Check whether current Java SE is exactly matching provided platform.
* @param platform Java SE platform to compare with.
*/
public static boolean is(JavaSEPlatform platform) {
return CURRENT.equals(platform);
}
/**
* Check whether current Java SE is at least (greater or equal) provided platform.
* @param platform Java SE platform to compare with.
*/
public static boolean atLeast(JavaSEPlatform platform) {
return CURRENT.gte(platform);
}
/**
* Returns a JavaSEPlatform with a value represented by the
* specified String. The JavaSEPlatform returned
* represents existing value only if specified String
* matches any String returned by versionString()
* method.
* Otherwise null value is returned.
* @param platformName Value containing JavaSEPlatform
* versionString representation.
* @return JavaSEPlatform value represented
* by String or null if value
* was not recognized.
*/
public static JavaSEPlatform toValue(final String platformName) {
if (platformName != null) {
return (stringValuesMap.get(platformName));
} else {
return null;
}
}
// There are not too many versions yet so direct mapping in code is simple.
// Version 1.9 is considered as valid version for 9.0.
/**
* Returns a JavaSEPlatform matching provided
* major and minor version numbers.
* @param major Major version number.
* @param minor Minor version number.
* @return JavaSEPlatform value matching provided
* major and minor version numbers.
* {@code JavaSEPlatform.DEFAULT} value is returned for unknown
* Java SE version numbers.
*/
public static JavaSEPlatform toValue(final int major, final int minor) {
switch (major) {
case 1:
switch (minor) {
case 1: return v1_1;
case 2: return v1_2;
case 3: return v1_3;
case 4: return v1_4;
case 5: return v1_5;
case 6: return v1_6;
case 7: return v1_7;
case 8: return v1_8;
case 9: return v9_0;
default: return LATEST;
}
case 9: return v9_0;
case 10: return v10_0;
case 11: return v11_0;
case 12: return v12_0;
case 13: return v13_0;
case 14: return v14_0;
default: return LATEST;
}
}
/**
* Generate {@link String} containing minor and major version numbers
* in {@code '.' } format.
* @param major Major version number.
* @param minor Minor version number.
* @return Generated {@link String}
*/
public static final String versionString(final int major, final int minor) {
StringBuilder sb = new StringBuilder(4);
sb.append(Integer.toString(major));
sb.append(JavaVersion.SEPARATOR);
sb.append(Integer.toString(minor));
return sb.toString();
}
/**
* Constructs an instance of Java SE platform.
* @param major major version number
* @param minor minor version number
* @param addVersions additional version numbers if defined
*/
JavaSEPlatform(final int major, final int minor, Version ...addVersions) {
this.version = new Version(major, minor);
this.addVersions = addVersions;
}
/** Java SE version numbers. */
private final Version version;
/** Additional version numbers. */
private final Version[] addVersions;
/**
* Get major version number.
* @return Major version number.
*/
public final int getMajor() {
return version.major;
}
/**
* Get minor version number.
* @return Minor version number.
*/
public final int getMinor() {
return version.minor;
}
/**
* Get additional version numbers.
* @return an array of additional version numbers if exist or {@code null} if no additional
* version numbers are defined.
*/
public final Version[] getAdditionalVersions() {
return addVersions;
}
/**
* Check if this platform is equal or greater to specified platform.
* @param platform Platform to compare with.
* @return Value of true if this platform is equal
* or greater to specified platform or false otherwise.
*/
public boolean gte(final JavaSEPlatform platform) {
return compareTo(platform) >= 0;
}
/**
* Check whether this platform is supported platform.
* @return Value of true when this platform is supported
* platform or false otherwise.
*/
public boolean isSupported() {
return compareTo(MIN_SUPPORTED) >= 0;
}
/**
* Return computer readable {@code String} containing version numbers in {@code '.' } format.
* @return computer readable {@code String} containing version numbers
*/
public String versionString() {
return versionString(version.major, version.minor);
}
// Currently this is identical with versionString() method.
/**
* Return Java SE platform version as human readable {@code String}.
* @return Java SE platform version as human readable {@code String}.
*/
@Override
public String toString() {
return versionString(version.major, version.minor);
}
}