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use reflections library for class search
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Nitay Joffe
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Oct 26, 2013
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,93 +1,64 @@ | ||
| package org.ggp.base.util.reflection; | ||
|
|
||
| import java.io.File; | ||
| import java.io.FilenameFilter; | ||
| import java.lang.reflect.Modifier; | ||
| import java.util.*; | ||
|
|
||
| import com.google.common.base.Objects; | ||
| import com.google.common.base.Predicate; | ||
| import com.google.common.collect.ImmutableSet; | ||
| import com.google.common.collect.Sets; | ||
| import org.ggp.base.apps.kiosk.GameCanvas; | ||
| import org.ggp.base.player.gamer.Gamer; | ||
| import org.ggp.base.util.configuration.ProjectConfiguration; | ||
| import org.reflections.Reflections; | ||
|
|
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| import java.lang.reflect.Modifier; | ||
|
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| public class ProjectSearcher { | ||
| public static void main(String[] args) | ||
| { | ||
| System.out.println(getAllClassesThatAre(Gamer.class)); | ||
| } | ||
|
|
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| public static List<Class<?>> getAllClassesThatAre(Class<?> ofThisType) | ||
| { | ||
| return getAllClassesThatAre(ofThisType, true); | ||
| System.out.println(GAMERS); | ||
| System.out.println(GAME_CANVASES); | ||
| } | ||
|
|
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| public static List<Class<?>> getAllClassesThatAre(Class<?> ofThisType, boolean mustBeConcrete) | ||
| { | ||
| List<Class<?>> rval = new ArrayList<Class<?>>(); | ||
| findClassesInList(allClasses, ofThisType, mustBeConcrete, rval); | ||
| findClassesInList(injectedClasses, ofThisType, mustBeConcrete, rval); | ||
| return rval; | ||
| } | ||
| private static final Reflections REFLECTIONS = new Reflections(); | ||
|
|
||
| private static void findClassesInList(Set<String> classesToSearch, Class<?> ofThisType, | ||
| boolean mustBeConcrete, List<Class<?>> rval) { | ||
| for(String name : classesToSearch) { | ||
| if(name.contains("Test_")) | ||
| continue; | ||
| public static final LoadedClasses<Gamer> GAMERS = new LoadedClasses(Gamer.class); | ||
| public static final LoadedClasses<GameCanvas> GAME_CANVASES = new LoadedClasses(GameCanvas.class); | ||
|
|
||
| Class<?> c = null; | ||
| try { | ||
| c = Class.forName(name); | ||
| } catch (ClassNotFoundException ex) { | ||
| throw new RuntimeException(ex); | ||
| public static class LoadedClasses<T> { | ||
| private static Predicate<Class> IS_CONCRETE_CLASS = new Predicate<Class>() { | ||
| @Override | ||
| public boolean apply(Class klass) { | ||
| return !Modifier.isAbstract(klass.getModifiers()); | ||
| } | ||
| }; | ||
|
|
||
| if(ofThisType.isAssignableFrom(c) && (!mustBeConcrete || !Modifier.isAbstract(c.getModifiers())) ) | ||
| rval.add(c); | ||
| } | ||
| } | ||
| private final Class<T> interfaceClass; | ||
| private final ImmutableSet<Class<? extends T>> allClasses; | ||
| private final ImmutableSet<Class<? extends T>> concreteClasses; | ||
|
|
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| private static Set<String> allClasses = findAllClasses(); | ||
| private static Set<String> injectedClasses = Sets.newHashSet(); | ||
| private LoadedClasses(Class<T> interfaceClass) { | ||
| this.interfaceClass = interfaceClass; | ||
| this.allClasses = ImmutableSet.copyOf(REFLECTIONS.getSubTypesOf(interfaceClass)); | ||
| this.concreteClasses = ImmutableSet.copyOf(Sets.filter(allClasses, IS_CONCRETE_CLASS)); | ||
| } | ||
|
|
||
| public static <T> void injectClass(Class<T> klass) { | ||
| injectedClasses.add(klass.getCanonicalName()); | ||
| } | ||
| public Class<T> getInterfaceClass() { | ||
| return interfaceClass; | ||
| } | ||
|
|
||
| private static Set<String> findAllClasses() | ||
| { | ||
| FilenameFilter filter = new FilenameFilter() { | ||
| public boolean accept(File dir, String name) { | ||
| return !name.startsWith("."); | ||
| } | ||
| }; | ||
| public ImmutableSet<Class<? extends T>> getConcreteClasses() { | ||
| return concreteClasses; | ||
| } | ||
|
|
||
| Set<String> rval = Sets.newHashSet(); | ||
| Stack<File> toProcess = new Stack<File>(); | ||
| for(String classDirName : ProjectConfiguration.classRoots) | ||
| toProcess.add(new File(classDirName)); | ||
| while(!toProcess.empty()) | ||
| { | ||
| File f = toProcess.pop(); | ||
| if(!f.exists()) | ||
| System.out.println("Could not find expected file: [" + f + "] when running ProjectSearcher."); | ||
| if(f.isDirectory()) | ||
| toProcess.addAll(Arrays.asList(f.listFiles(filter))); | ||
| else | ||
| { | ||
| if(f.getName().endsWith(".class")) | ||
| { | ||
| String fullyQualifiedName = f.getPath(); | ||
| for(String classDirName : ProjectConfiguration.classRoots) { | ||
| fullyQualifiedName = fullyQualifiedName.replaceAll("^" + classDirName.replace(File.separatorChar, '.'), ""); | ||
| } | ||
| fullyQualifiedName = fullyQualifiedName.replaceAll("\\.class$",""); | ||
| fullyQualifiedName = fullyQualifiedName.replaceAll("^[\\\\/]", ""); | ||
| fullyQualifiedName = fullyQualifiedName.replaceAll("[\\\\/]", "."); | ||
| rval.add(fullyQualifiedName); | ||
| } | ||
| } | ||
| } | ||
| public ImmutableSet<Class<? extends T>> getAllClasses() { | ||
| return allClasses; | ||
| } | ||
|
|
||
| return rval; | ||
| } | ||
| @Override | ||
| public String toString() { | ||
| return Objects.toStringHelper(this) | ||
| .add("allClasses", allClasses) | ||
| .add("interfaceClass", interfaceClass) | ||
| .add("concreteClasses", concreteClasses) | ||
| .toString(); | ||
| } | ||
| } | ||
| } |