| 1 | /* |
| 2 | |
| 3 | Derby - Class org.apache.derby.impl.services.reflect.ReflectLoaderJava2 |
| 4 | |
| 5 | Copyright 2002, 2004 The Apache Software Foundation or its licensors, as applicable. |
| 6 | |
| 7 | Licensed under the Apache License, Version 2.0 (the "License"); |
| 8 | you may not use this file except in compliance with the License. |
| 9 | You may obtain a copy of the License at |
| 10 | |
| 11 | http://www.apache.org/licenses/LICENSE-2.0 |
| 12 | |
| 13 | Unless required by applicable law or agreed to in writing, software |
| 14 | distributed under the License is distributed on an "AS IS" BASIS, |
| 15 | WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 16 | See the License for the specific language governing permissions and |
| 17 | limitations under the License. |
| 18 | |
| 19 | */ |
| 20 | |
| 21 | package org.apache.derby.impl.services.reflect; |
| 22 | |
| 23 | import org.apache.derby.iapi.util.ByteArray; |
| 24 | import org.apache.derby.iapi.sql.compile.CodeGeneration; |
| 25 | |
| 26 | final class ReflectLoaderJava2 extends ClassLoader { |
| 27 | |
| 28 | /* |
| 29 | ** Fields |
| 30 | */ |
| 31 | |
| 32 | private final DatabaseClasses cf; |
| 33 | |
| 34 | /* |
| 35 | ** Constructor |
| 36 | */ |
| 37 | |
| 38 | ReflectLoaderJava2(ClassLoader parent, DatabaseClasses cf) { |
| 39 | super(parent); |
| 40 | this.cf = cf; |
| 41 | } |
| 42 | |
| 43 | protected Class findClass(String name) |
| 44 | throws ClassNotFoundException { |
| 45 | return cf.loadApplicationClass(name); |
| 46 | } |
| 47 | |
| 48 | /* |
| 49 | ** Implementation specific methods |
| 50 | ** NOTE these are COPIED from ReflectLoader as the two classes cannot be made into |
| 51 | a super/sub class pair. Because the Java2 one needs to call super(ClassLoader) |
| 52 | that was added in Java2 and it needs to not implement loadClass() |
| 53 | */ |
| 54 | |
| 55 | /** |
| 56 | Load a generated class from the passed in class data. |
| 57 | */ |
| 58 | public LoadedGeneratedClass loadGeneratedClass(String name, ByteArray classData) { |
| 59 | |
| 60 | Class jvmClass = defineClass(name, classData.getArray(), classData.getOffset(), classData.getLength()); |
| 61 | |
| 62 | resolveClass(jvmClass); |
| 63 | |
| 64 | /* |
| 65 | DJD - not enabling this yet, need more memory testing, may only |
| 66 | create a factory instance when a number of instances are created. |
| 67 | This would avoid a factory instance for DDL |
| 68 | |
| 69 | // now generate a factory class that loads instances |
| 70 | int lastDot = name.lastIndexOf('.'); |
| 71 | String factoryName = name.substring(lastDot + 1, name.length()).concat("_F"); |
| 72 | |
| 73 | classData = cf.buildSpecificFactory(name, factoryName); |
| 74 | Class factoryClass = defineClass(CodeGeneration.GENERATED_PACKAGE_PREFIX.concat(factoryName), |
| 75 | classData.getArray(), classData.getOffset(), classData.getLength()); |
| 76 | resolveClass(factoryClass); |
| 77 | |
| 78 | */ |
| 79 | Class factoryClass = null; |
| 80 | |
| 81 | return new ReflectGeneratedClass(cf, jvmClass, factoryClass); |
| 82 | } |
| 83 | } |