| /* |
| * Copyright (c) 1998, 2020 Oracle and/or its affiliates. All rights reserved. |
| * |
| * This program and the accompanying materials are made available under the |
| * terms of the Eclipse Public License v. 2.0 which is available at |
| * http://www.eclipse.org/legal/epl-2.0, |
| * or the Eclipse Distribution License v. 1.0 which is available at |
| * http://www.eclipse.org/org/documents/edl-v10.php. |
| * |
| * SPDX-License-Identifier: EPL-2.0 OR BSD-3-Clause |
| */ |
| |
| // Contributors: |
| // Oracle - initial API and implementation from Oracle TopLink |
| package org.eclipse.persistence.sdo; |
| |
| import java.io.IOException; |
| import java.io.ObjectInput; |
| import java.lang.reflect.Field; |
| |
| import org.eclipse.persistence.exceptions.SDOException; |
| import org.eclipse.persistence.internal.security.PrivilegedGetField; |
| import org.eclipse.persistence.internal.security.PrivilegedGetValueFromField; |
| import org.eclipse.persistence.internal.security.PrivilegedSetValueInField; |
| import org.eclipse.persistence.sdo.helper.DataObjectInputStream; |
| import org.eclipse.persistence.sdo.helper.SDOHelperContext; |
| |
| import commonj.sdo.helper.HelperContext; |
| import commonj.sdo.impl.ExternalizableDelegator.Resolvable; |
| import commonj.sdo.impl.HelperProvider; |
| |
| public class SDOExternalizableDelegator extends AbstractExternalizableDelegator { |
| |
| static final PrivilegedGetField privilegedGetDelegateField = new PrivilegedGetField(AbstractExternalizableDelegator.class, "delegate", true); |
| |
| public SDOExternalizableDelegator() { |
| super(); |
| } |
| |
| public SDOExternalizableDelegator(Object target) { |
| super(target); |
| } |
| |
| public SDOExternalizableDelegator(Object target, HelperContext aContext) { |
| // JIRA129: pass the helperContext to the constructor to enable non-static contexts |
| // check for context type (if non-static SDOHelperContext then we need to cast to use the non-interface createResolvable function |
| // to remove this instanceof check - add createResolvable to the HelperContext interface |
| if (aContext instanceof SDOHelperContext) { |
| setDelegate(((SDOHelperContext)aContext).createResolvable(target)); |
| } else { |
| // use static helper |
| setDelegate(HelperProvider.createResolvable(target)); |
| } |
| } |
| |
| @Override |
| public void readExternal(ObjectInput in) throws IOException, ClassNotFoundException { |
| // This function is indirectly called by InputStream.readExternalData(). |
| // We reset the static helperContext set in the default constructor during is.readObject() |
| // with the passed in context from the client (either static or dynamic instance) |
| if (in instanceof DataObjectInputStream) { |
| // only reset non-static implementations |
| getDelegate().setHelperContext(((DataObjectInputStream)in).getHelperContext()); |
| } |
| super.readExternal(in); |
| } |
| |
| private SDOResolvable getDelegate() { |
| try { |
| Field delegateField = privilegedGetDelegateField.run(); |
| PrivilegedGetValueFromField privilegedGetValueFromDelegateField = new PrivilegedGetValueFromField(delegateField, this); |
| return (SDOResolvable) privilegedGetValueFromDelegateField.run(); |
| }catch (NoSuchFieldException nsfException){ |
| throw SDOException.errorAccessingExternalizableDelegator("delegate", nsfException); |
| }catch (IllegalAccessException iaException){ |
| throw SDOException.errorAccessingExternalizableDelegator("delegate", iaException); |
| } |
| } |
| |
| private void setDelegate(Resolvable resolvable) { |
| try { |
| Field delegateField = privilegedGetDelegateField.run(); |
| PrivilegedSetValueInField privilegedSetValueInDelegateField = new PrivilegedSetValueInField(delegateField, this, resolvable); |
| privilegedSetValueInDelegateField.run(); |
| } catch (NoSuchFieldException nsfException){ |
| throw SDOException.errorAccessingExternalizableDelegator("delegate", nsfException); |
| } catch (IllegalAccessException iaException){ |
| throw SDOException.errorAccessingExternalizableDelegator("delegate", iaException); |
| } |
| } |
| } |