/*
* Copyright (c) 2020, 2020, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package com.oracle.svm.methodhandles;
// Checkstyle: stop
import java.lang.ref.SoftReference;
import java.lang.reflect.Array;
import com.oracle.svm.core.annotate.Alias;
import com.oracle.svm.core.annotate.RecomputeFieldValue;
import com.oracle.svm.core.annotate.RecomputeFieldValue.Kind;
import com.oracle.svm.core.annotate.TargetClass;
import jdk.vm.ci.meta.MetaAccessProvider;
import jdk.vm.ci.meta.ResolvedJavaField;
// Checkstyle: resume
@TargetClass(className = "java.lang.invoke.MethodTypeForm")
final class Target_java_lang_invoke_MethodTypeForm {
/*
* The following two fields are arrays that are filled lazily. Resetting them brings them into a
* consistent state, to avoid problems when the lazily initialization happens during image heap
* writing.
*/
@Alias @RecomputeFieldValue(kind = Kind.Custom, declClass = NewEmptyArrayTransformer.class) //
private SoftReference<?>[] methodHandles;
@Alias @RecomputeFieldValue(kind = Kind.Custom, declClass = NewEmptyArrayTransformer.class) //
private SoftReference<?>[] lambdaForms;
}
class NewEmptyArrayTransformer implements RecomputeFieldValue.CustomFieldValueTransformer {
@Override
public Object transform(MetaAccessProvider metaAccess, ResolvedJavaField original, ResolvedJavaField annotated, Object receiver, Object originalValue) {
if (originalValue == null) {
return null;
} else {
int originalLength = Array.getLength(originalValue);
return Array.newInstance(originalValue.getClass().getComponentType(), originalLength);
}
}
}