[14977] | 1 | // License: GPL. For details, see LICENSE file.
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| 2 | package org.openstreetmap.josm.tools;
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| 3 |
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| 4 | import java.lang.reflect.AccessibleObject;
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| 5 | import java.security.AccessController;
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| 6 | import java.security.PrivilegedAction;
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| 7 | import java.util.Collection;
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| 8 | import java.util.function.Function;
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| 9 |
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[14978] | 10 | import org.openstreetmap.josm.plugins.PluginHandler;
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| 11 |
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[14977] | 12 | /**
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| 13 | * Reflection utilities.
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| 14 | * @since 14977
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| 15 | */
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| 16 | public final class ReflectionUtils {
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| 17 |
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| 18 | private ReflectionUtils() {
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| 19 | // Hide default constructor for utils classes
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| 20 | }
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| 21 |
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| 22 | /**
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| 23 | * Sets {@code AccessibleObject}(s) accessible.
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| 24 | * @param objects objects
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| 25 | * @see AccessibleObject#setAccessible
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| 26 | */
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| 27 | public static void setObjectsAccessible(final AccessibleObject... objects) {
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| 28 | if (objects != null && objects.length > 0) {
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| 29 | AccessController.doPrivileged((PrivilegedAction<Object>) () -> {
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| 30 | for (AccessibleObject o : objects) {
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| 31 | if (o != null) {
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| 32 | o.setAccessible(true);
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| 33 | }
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| 34 | }
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| 35 | return null;
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| 36 | });
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| 37 | }
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| 38 | }
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| 39 |
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| 40 | /**
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| 41 | * To use from a method to know which class called it.
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| 42 | * @param exclusions classes to exclude from the search. Can be null
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| 43 | * @return the first calling class not present in {@code exclusions}
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| 44 | */
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| 45 | public static Class<?> findCallerClass(Collection<Class<?>> exclusions) {
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| 46 | return findCaller(x -> {
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| 47 | try {
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| 48 | return Class.forName(x.getClassName());
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| 49 | } catch (ClassNotFoundException e) {
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[14978] | 50 | for (ClassLoader cl : PluginHandler.getPluginClassLoaders()) {
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| 51 | try {
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| 52 | return Class.forName(x.getClassName(), true, cl);
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| 53 | } catch (ClassNotFoundException ex) {
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| 54 | Logging.trace(ex);
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| 55 | }
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| 56 | }
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[14977] | 57 | Logging.error(e);
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| 58 | return null;
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| 59 | }
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| 60 | }, exclusions);
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| 61 | }
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| 62 |
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| 63 | private static <T extends Object> T findCaller(Function<StackTraceElement, T> getter, Collection<T> exclusions) {
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| 64 | StackTraceElement[] stack = Thread.currentThread().getStackTrace();
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| 65 | for (int i = 3; i < stack.length; i++) {
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| 66 | T t = getter.apply(stack[i]);
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| 67 | if (exclusions == null || !exclusions.contains(t)) {
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| 68 | return t;
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| 69 | }
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| 70 | }
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| 71 | return null;
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| 72 | }
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| 73 | }
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