org.eclipse.persistence.internal.helper.JavaSEPlatform Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of eclipselink Show documentation
Show all versions of eclipselink Show documentation
EclipseLink build based upon Git transaction f2b9fc5
/*
* Copyright (c) 1998, 2021 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(major);
sb.append(JavaVersion.SEPARATOR);
sb.append(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);
}
}