| 1 | /* |
| 2 | * $Id: InterfaceBuilder.java,v 1.6 2005/11/17 00:32:10 hastings Exp $ |
| 3 | * |
| 4 | * (c) Copyright, Moebius Solutions, Inc., 2004 |
| 5 | * |
| 6 | * All Rights Reserved |
| 7 | * |
| 8 | * This material may be reproduced by or for the U. S. Government |
| 9 | * pursuant to the copyright license under the clause at |
| 10 | * DFARS 252.227-7014 (OCT 2001). |
| 11 | */ |
| 12 | |
| 13 | package com.moesol.bindings.platform_sdk.component_services; |
| 14 | |
| 15 | import java.lang.reflect.Field; |
| 16 | |
| 17 | /** |
| 18 | * Build a null COM interface wrapper from java type information. |
| 19 | * @author robert |
| 20 | */ |
| 21 | public class InterfaceBuilder { |
| 22 | private Class m_iface_class; |
| 23 | private GUID m_iid; |
| 24 | private IUnknown m_result; |
| 25 | |
| 26 | public InterfaceBuilder(Object[] out_iface) { |
| 27 | this(getInterfaceClassFromArray(out_iface)); |
| 28 | } |
| 29 | public InterfaceBuilder(Class iface_type) { |
| 30 | m_iface_class = iface_type; |
| 31 | m_iid = getIIDFromClass(iface_type); |
| 32 | Class clazz = getInnerClassFromClass(iface_type); |
| 33 | m_result = createInterfaceFromClass(clazz); |
| 34 | } |
| 35 | private Class getInnerClassFromClass(Class iface_type) { |
| 36 | Class [] classes = iface_type.getClasses(); |
| 37 | for (int i=0; i<classes.length; i++) { |
| 38 | if (classes[i].getName().endsWith("Jni")) { |
| 39 | return classes[i]; |
| 40 | } |
| 41 | } |
| 42 | return iface_type; |
| 43 | } |
| 44 | |
| 45 | public Class getInterfaceClass() { |
| 46 | return m_iface_class; |
| 47 | } |
| 48 | public GUID getIID() { |
| 49 | return m_iid; |
| 50 | } |
| 51 | public byte[] getIIDBytes() { |
| 52 | return m_iid._getStructureBytes(); |
| 53 | } |
| 54 | public IUnknown getResult() { |
| 55 | return m_result; |
| 56 | } |
| 57 | |
| 58 | private static GUID getIIDFromClass(Class iface_type) { |
| 59 | return getIID(getIIDField(iface_type)); |
| 60 | } |
| 61 | private static IUnknown createInterfaceFromClass(Class iface_type) { |
| 62 | return jni_createInterfaceFromClass(iface_type); |
| 63 | } |
| 64 | |
| 65 | private static native IUnknown jni_createInterfaceFromClass(Class iface_type); |
| 66 | |
| 67 | private static Class getInterfaceClassFromArray(Object [] out_iface) { |
| 68 | return out_iface.getClass().getComponentType(); |
| 69 | } |
| 70 | private static Field getIIDField(Class iface_type) { |
| 71 | try { |
| 72 | return iface_type.getField("IID"); |
| 73 | } catch (Exception e) { |
| 74 | throw new RuntimeException(e); |
| 75 | } |
| 76 | } |
| 77 | private static GUID getIID(Field iid_field) { |
| 78 | try { |
| 79 | return (GUID) iid_field.get(null); |
| 80 | } catch (Exception e) { |
| 81 | throw new RuntimeException(e); |
| 82 | } |
| 83 | } |
| 84 | } |