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Utils: Add isOpenJDKRuntime() and isJavaSERuntime() helpers.

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This commit is contained in:
Andreas Schildbach 2019-01-02 16:20:23 +01:00
parent 39386853a1
commit cdbf9ecc9f
2 changed files with 39 additions and 6 deletions
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38
core/src/main/java/org/bitcoinj/core/Utils.java
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@ -36,6 +36,8 @@ import java.util.concurrent.TimeUnit;
import java.util.regex.Pattern;
import org.bouncycastle.crypto.digests.RIPEMD160Digest;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.google.common.base.Joiner;
import com.google.common.base.Splitter;
@ -69,6 +71,8 @@ public class Utils {
private static BlockingQueue<Boolean> mockSleepQueue;
private static final Logger log = LoggerFactory.getLogger(Utils.class);
/**
* <p>
* The regular {@link BigInteger#toByteArray()} includes the sign bit of the number and
@ -546,13 +550,35 @@ public class Utils {
return maxItem;
}
private static int isAndroid = -1;
private enum Runtime {
ANDROID, OPENJDK, ORACLE_JAVA
}
private static Runtime runtime = null;
static {
String runtimeProp = System.getProperty("java.runtime.name").toLowerCase(Locale.US);
if (runtimeProp == null)
runtime = null;
else if (runtimeProp.contains("android"))
runtime = Runtime.ANDROID;
else if (runtimeProp.contains("openjdk"))
runtime = Runtime.OPENJDK;
else if (runtimeProp.contains("java(tm) se"))
runtime = Runtime.ORACLE_JAVA;
else
log.info("Unknown java.runtime.name '{}'", runtimeProp);
}
public static boolean isAndroidRuntime() {
if (isAndroid == -1) {
final String runtime = System.getProperty("java.runtime.name");
isAndroid = (runtime != null && runtime.equals("Android Runtime")) ? 1 : 0;
}
return isAndroid == 1;
return runtime == Runtime.ANDROID;
}
public static boolean isOpenJDKRuntime() {
return runtime == Runtime.OPENJDK;
}
public static boolean isOracleJavaRuntime() {
return runtime == Runtime.ORACLE_JAVA;
}
public static boolean isLinux() {

7
core/src/test/java/org/bitcoinj/core/UtilsTest.java
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@ -112,4 +112,11 @@ public class UtilsTest {
byte[] actual = Utils.bigIntegerToBytes(b, 1);
assertTrue(Arrays.equals(expected, actual));
}
@Test
public void runtime() {
// This test assumes it is run within a Java runtime for desktop computers.
assertTrue(Utils.isOpenJDKRuntime() || Utils.isOracleJavaRuntime());
assertFalse(Utils.isAndroidRuntime());
}
}