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/*
* Copyright (C) 2007 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
import java.lang.reflect.Constructor;
import java.lang.reflect.Constructor;
/**
* Test instance creation.
*/
public class Main {
public static void main(String[] args) {
testClassNewInstance();
testConstructorNewInstance();
}
/**
* Tests Class.newInstance().
*/
static void testClassNewInstance() {
// should succeed
try {
Class c = Class.forName("LocalClass");
Object obj = c.newInstance();
System.out.println("LocalClass succeeded");
} catch (Exception ex) {
System.err.println("LocalClass failed");
ex.printStackTrace();
}
// should fail
try {
Class c = Class.forName("otherpackage.PackageAccess");
Object obj = c.newInstance();
System.err.println("ERROR: PackageAccess succeeded unexpectedly");
} catch (IllegalAccessException iae) {
System.out.println("Got expected PackageAccess complaint");
} catch (Exception ex) {
System.err.println("Got unexpected PackageAccess failure");
ex.printStackTrace();
}
LocalClass3.main();
try {
MaybeAbstract ma = new MaybeAbstract();
System.err.println("ERROR: MaybeAbstract succeeded unexpectedly");
} catch (InstantiationError ie) {
System.out.println("Got expected InstantationError");
} catch (Exception ex) {
System.err.println("Got unexpected MaybeAbstract failure");
}
}
/**
* Tests Constructor.newInstance().
*/
static void testConstructorNewInstance() {
// should fail -- getConstructor only returns public constructors
try {
Class c = Class.forName("LocalClass");
Constructor cons = c.getConstructor(new Class[0] /*(Class[])null*/);
System.err.println("Cons LocalClass succeeded unexpectedly");
} catch (NoSuchMethodException nsme) {
System.out.println("Cons LocalClass failed as expected");
} catch (Exception ex) {
System.err.println("Cons LocalClass failed strangely");
ex.printStackTrace();
}
// should succeed
try {
Class c = Class.forName("LocalClass2");
Constructor cons = c.getConstructor((Class[]) null);
Object obj = cons.newInstance();
System.out.println("Cons LocalClass2 succeeded");
} catch (Exception ex) {
System.err.println("Cons LocalClass2 failed");
ex.printStackTrace();
}
// should fail
try {
Class c = Class.forName("otherpackage.PackageAccess");
Constructor cons = c.getConstructor(new Class[0] /*(Class[])null*/);
System.err.println("ERROR: Cons PackageAccess succeeded unexpectedly");
} catch (NoSuchMethodException nsme) {
System.out.println("Cons got expected PackageAccess complaint");
} catch (Exception ex) {
System.err.println("Cons got unexpected PackageAccess failure");
ex.printStackTrace();
}
// should fail
try {
Class c = Class.forName("MaybeAbstract");
Constructor cons = c.getConstructor(new Class[0] /*(Class[])null*/);
Object obj = cons.newInstance();
System.err.println("ERROR: Cons MaybeAbstract succeeded unexpectedly");
} catch (InstantiationException ie) {
// note InstantiationException vs. InstantiationError
System.out.println("Cons got expected InstantationException");
} catch (Exception ex) {
System.err.println("Cons got unexpected MaybeAbstract failure");
ex.printStackTrace();
}
}
}
class LocalClass {
// this class has a default constructor with package visibility
}
class LocalClass2 {
public LocalClass2() {}
}
class LocalClass3 {
public static void main() {
try {
CC.newInstance();
System.out.println("LocalClass3 succeeded");
} catch (Exception ex) {
System.err.println("Got unexpected LocalClass3 failure");
ex.printStackTrace();
}
}
static class CC {
private CC() {}
static Object newInstance() {
try {
Class c = CC.class;
return c.newInstance();
} catch (Exception ex) {
ex.printStackTrace();
return null;
}
}
}
}
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