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/* |
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* Written by Martin Buchholz with assistance from members of JCP JSR-166 |
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* Expert Group and released to the public domain, as explained at |
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* http://creativecommons.org/publicdomain/zero/1.0/ |
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*/ |
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|
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package jsr166; |
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|
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import java.io.InvalidClassException; |
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import java.io.ObjectInputStream; |
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import java.lang.invoke.MethodHandle; |
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import java.lang.invoke.MethodHandles; |
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import static java.lang.invoke.MethodType.methodType; |
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|
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/** |
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* A portability layer to allow running on a variety of JDKs. |
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* |
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* SharedSecrets was moved to a different package in jdk12. |
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* |
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* This package should never be integrated into openjdk. |
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*/ |
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public class Platform { |
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/** |
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* See JavaObjectInputStreamAccess#checkArray. |
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* @param ois ... |
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* @param arrayType ... |
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* @param arrayLength ... |
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* @throws InvalidClassException ... |
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*/ |
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public static void checkArray( |
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ObjectInputStream ois, Class<?> arrayType, int arrayLength) |
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throws InvalidClassException { |
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try { |
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checkArray.invoke(theJavaObjectInputStreamAccess, |
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ois, arrayType, arrayLength); |
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} |
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catch (InvalidClassException | RuntimeException x) { throw x; } |
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catch (Throwable x) { throw new Error(x); } |
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} |
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|
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private static final Object theJavaObjectInputStreamAccess; |
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private static final MethodHandle checkArray; |
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static { |
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try { |
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Class<?> sharedSecrets, access; |
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try { |
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sharedSecrets = Class.forName("jdk.internal.misc.SharedSecrets"); |
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access = Class.forName("jdk.internal.misc.JavaObjectInputStreamAccess"); |
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} catch (ClassNotFoundException retry) { |
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sharedSecrets = Class.forName("jdk.internal.access.SharedSecrets"); |
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access = Class.forName("jdk.internal.access.JavaObjectInputStreamAccess"); |
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} |
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MethodHandles.Lookup lookup = MethodHandles.lookup(); |
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theJavaObjectInputStreamAccess = lookup.findStatic( |
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sharedSecrets, "getJavaObjectInputStreamAccess", |
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methodType(access)) |
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.invoke(); |
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checkArray = lookup.findVirtual( |
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access, "checkArray", |
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methodType(void.class, ObjectInputStream.class, Class.class, int.class)); |
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} catch (Throwable e) { |
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throw new ExceptionInInitializerError(e); |
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} |
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} |
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} |
