57 lines
2.1 KiB
Java
57 lines
2.1 KiB
Java
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package org.broadinstitute.sting.utils;
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import java.util.List;
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import java.util.ArrayList;
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import java.io.File;
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import java.io.IOException;
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/**
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* PackageUtils contains some useful methods for package introspection.
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*/
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public class PackageUtils {
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/**
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* Private constructor. No instantiating this class!
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*/
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private PackageUtils() {}
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/**
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* Return the classes that implement the specified interface.
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*
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* @param iface the interface which returned classes should implement.
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* @return the list of classes that implement the interface. How is that not clear by now?!!!!111one!!
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*/
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public static ArrayList<Class> getClassesImplementingInterface(Class iface) {
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try {
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final File location = JVMUtils.getLocationFor(iface);
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List<Class> potentialClasses = getClassesFromLocation(location);
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ArrayList<Class> implementingClasses = new ArrayList<Class>();
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for (Class potentialClass : potentialClasses) {
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if (JVMUtils.isConcreteImplementationOf(potentialClass, iface)) {
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implementingClasses.add(potentialClass);
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}
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}
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return implementingClasses;
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} catch (IOException e) {
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throw new StingException(String.format("Unable to inspect package containing '%s'", iface.getName()));
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}
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}
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/**
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* Return a list of classes at the specified location
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* @param location the location where we should start searching (as returned by JVMUtils.getLocationFor(Class))
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* @return a list of classes at this location
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* @throws IOException thrown if the jar or directory cannot be inspected
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*/
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public static List<Class> getClassesFromLocation(File location) throws IOException {
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if (location.getAbsolutePath().endsWith(".jar"))
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return JVMUtils.loadInternalClassesFromJar(location);
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else {
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List<String> classFileNames = PathUtils.findFilesInPath(location, "", "class", true);
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return JVMUtils.loadInternalClasses(classFileNames);
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}
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}
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}
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