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Diffstat (limited to 'test/042-new-instance/src/Main.java')
-rw-r--r-- | test/042-new-instance/src/Main.java | 156 |
1 files changed, 156 insertions, 0 deletions
diff --git a/test/042-new-instance/src/Main.java b/test/042-new-instance/src/Main.java new file mode 100644 index 0000000000..8faef1349f --- /dev/null +++ b/test/042-new-instance/src/Main.java @@ -0,0 +1,156 @@ +/* + * 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; + } + } + } +} |