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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10 | import org.openstreetmap.josm.plugins.PluginHandler;
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11 |
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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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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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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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