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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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 io.microsphere.util;
import javax.lang.model.SourceVersion;
import static io.microsphere.constants.SymbolConstants.DOT_CHAR;
import static io.microsphere.util.SystemUtils.JAVA_VERSION;
import static io.microsphere.util.Version.of;
import static javax.lang.model.SourceVersion.latest;
/**
* The utility class for version
*
* @author Mercy
* @see Version
* @since 1.0.0
*/
public abstract class VersionUtils extends BaseUtils {
/**
* The latest {@link SourceVersion Java Release Version}
*/
public static final SourceVersion LATEST_JAVA_VERSION = latest();
/**
* The {@link Version} instance for current Java Version
*/
public static final Version CURRENT_JAVA_VERSION = of(currentJavaVersion());
/**
* The {@link Version} instance for Java 8
*/
public static final Version JAVA_VERSION_8 = of(8);
/**
* The {@link Version} instance for Java 9
*/
public static final Version JAVA_VERSION_9 = of(9);
/**
* The {@link Version} instance for Java 10
*/
public static final Version JAVA_VERSION_10 = of(10);
/**
* The {@link Version} instance for Java 11
*/
public static final Version JAVA_VERSION_11 = of(11);
/**
* The {@link Version} instance for Java 12
*/
public static final Version JAVA_VERSION_12 = of(12);
/**
* The {@link Version} instance for Java 13
*/
public static final Version JAVA_VERSION_13 = of(13);
/**
* The {@link Version} instance for Java 14
*/
public static final Version JAVA_VERSION_14 = of(14);
/**
* The {@link Version} instance for Java 15
*/
public static final Version JAVA_VERSION_15 = of(15);
/**
* The {@link Version} instance for Java 16
*/
public static final Version JAVA_VERSION_16 = of(16);
/**
* The {@link Version} instance for Java 17
*/
public static final Version JAVA_VERSION_17 = of(17);
/**
* The {@link Version} instance for Java 18
*/
public static final Version JAVA_VERSION_18 = of(18);
/**
* The {@link Version} instance for Java 19
*/
public static final Version JAVA_VERSION_19 = of(19);
/**
* The {@link Version} instance for Java 20
*/
public static final Version JAVA_VERSION_20 = of(20);
/**
* The {@link Version} instance for Java 21
*/
public static final Version JAVA_VERSION_21 = of(21);
/**
* The {@link Version} instance for Java 22
*/
public static final Version JAVA_VERSION_22 = of(22);
/**
* Determine whether the current Java version matches the specified version
*
* @param comparedVersion the {@link Version} to be compared
* @param versionOperator the {@link Version.Operator}
* @return true if {@link Version.Operator} {@link Version.Operator#test(Object, Object) matches}
* {@link #CURRENT_JAVA_VERSION current version} and comparedVersion
*/
public static boolean testCurrentJavaVersion(Version comparedVersion, Version.Operator versionOperator) {
return versionOperator.test(CURRENT_JAVA_VERSION, comparedVersion);
}
private static String currentJavaVersion() {
String javaVersion = JAVA_VERSION;
int firstDotIndex = javaVersion.indexOf(DOT_CHAR);
if (firstDotIndex > -1) {
String majorVersion = javaVersion.substring(0, firstDotIndex);
if ("1".equals(majorVersion)) { // JDK Version is like "1.x.y"
// it takes 'x' as the major version
int startIndex = firstDotIndex + 1;
int endIndex = javaVersion.indexOf(DOT_CHAR, startIndex);
majorVersion = javaVersion.substring(startIndex, endIndex);
return majorVersion;
}
}
return javaVersion;
}
}