| /******************************************************************************* |
| * Copyright (c) 2015, 2016 Google, Inc and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * Stefan Xenos (Google) - Initial implementation |
| *******************************************************************************/ |
| package org.eclipse.jdt.internal.core.nd.field; |
| |
| import org.eclipse.jdt.internal.core.nd.ITypeFactory; |
| import org.eclipse.jdt.internal.core.nd.Nd; |
| |
| /** |
| * Used to represent a single field of an object stored in the database. Objects |
| * which store themselves in the database should store a set of static final |
| * FieldDefinitions at the top of their class definition to indicate their memory map. |
| * This serves as a standard way to document the memory map for such structs, provides |
| * access to the field offsets, and provides a convenience getter. |
| * <p> |
| * There are two ways to use this. Callers can either use the "get" method to access |
| * the value of the field, or can use the public "offset" attribute to perform the reads |
| * manually. The get function is more convenient but allocates objects and so should |
| * probably not be used for frequently-accessed fields or primitive types that would |
| * end up being autoboxed unnecessarily. |
| * |
| * @param <T> |
| */ |
| public final class Field<T> extends BaseField implements IDestructableField { |
| public final ITypeFactory<T> factory; |
| |
| public Field(ITypeFactory<T> objectFactory, String structName, int fieldNumber) { |
| setFieldName("field " + fieldNumber + ", a " + getClass().getSimpleName() //$NON-NLS-1$//$NON-NLS-2$ |
| + " in struct " + structName); //$NON-NLS-1$ |
| this.factory = objectFactory; |
| } |
| |
| public T get(Nd nd, long address) { |
| return this.factory.create(nd, address + this.offset); |
| } |
| |
| public boolean hasDestructor() { |
| return this.factory.hasDestructor(); |
| } |
| |
| @Override |
| public void destruct(Nd nd, long address) { |
| this.factory.destruct(nd, address + this.offset); |
| } |
| |
| @Override |
| public int getRecordSize() { |
| return this.factory.getRecordSize(); |
| } |
| } |