JavaVersion.java

/*
 * Copyright 2014-2015 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.glowroot.agent.util;

import javax.annotation.Nullable;

import com.google.common.annotations.VisibleForTesting;
import com.google.common.base.StandardSystemProperty;

public class JavaVersion {

    private static final boolean IS_JAVA_6;

    static {
        IS_JAVA_6 = parseIsJava6(StandardSystemProperty.JAVA_VERSION.value());
    }

    private JavaVersion() {}

    public static boolean isJava6() {
        return IS_JAVA_6;
    }

    @VisibleForTesting
    static boolean parseIsJava6(@Nullable String javaVersion) {
        return javaVersion != null && javaVersion.startsWith("1.6");
    }
}