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/*
* Copyright 2002-2015 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.springframework.tests;
/**
* Enumeration of known JDK versions.
*
* @author Phillip Webb
* @see #runningVersion()
*/
public enum JavaVersion {
/**
* Java 1.6
*/
JAVA_16("1.6", 16),
/**
* Java 1.7
*/
JAVA_17("1.7", 17),
/**
* Java 1.8
*/
JAVA_18("1.8", 18),
/**
* Java 1.9
*/
JAVA_19("1.9", 19);
private static final JavaVersion runningVersion = findRunningVersion();
private static JavaVersion findRunningVersion() {
String version = System.getProperty("java.version");
for (JavaVersion candidate : values()) {
if (version.startsWith(candidate.version)) {
return candidate;
}
}
return JavaVersion.JAVA_16;
}
private String version;
private int value;
private JavaVersion(String version, int value) {
this.version = version;
this.value = value;
}
@Override
public String toString() {
return version;
}
/**
* Determines if the specified version is the same as or greater than this version.
* @param version the version to check
* @return {@code true} if the specified version is at least this version
*/
public boolean isAtLeast(JavaVersion version) {
return (this.value >= version.value);
}
/**
* Returns the current running JDK version. If the current version cannot be
* determined {@link #JAVA_16} will be returned.
* @return the JDK version
*/
public static JavaVersion runningVersion() {
return runningVersion;
}
}
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