| /******************************************************************************* |
| * Copyright (c) 2005 IBM Corporation 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: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| /* |
| |
| |
| */ |
| package org.eclipse.jem.internal.proxy.initParser.tree; |
| |
| |
| /** |
| * This interface is used for expression proxies in the evaluation side (in {@link org.eclipse.jem.internal.proxy.initParser.tree.ExpressionProcesser}). |
| * <p> |
| * It is meant to be implemented only by users of the ExpressionProcessor. |
| * |
| * @since 1.1.0 |
| */ |
| public interface InternalExpressionProxy { |
| |
| /** |
| * Get the id of the proxy. |
| * @return |
| * |
| * @since 1.1.0 |
| */ |
| public int getProxyID(); |
| |
| /** |
| * Called by ExpressionProcesser to give the expression proxy its value and type, i.e. it has been evaluated. |
| * <p> |
| * The type may not be the actual type of the value, it may be a superclass of it. It is the type that the proxy |
| * represents from the return of the expression. For instance it may of returned null but it is supposed to be |
| * java.lang.String. Or it is supposed to be a primitive int, since we can't store that, we need to store |
| * an Integer value with the type indicating it is Interger.TYPE. |
| * |
| * @param value |
| * @param type |
| * |
| * @since 1.1.0 |
| */ |
| public void setProxy(Object value, Class type); |
| |
| /** |
| * Get the value of the proxy. |
| * <p> |
| * Note: The value may be a {@link VariableReference}, in which |
| * case further dereferencing may be with the returned value. |
| * @return the value of the proxy, it may be an ExpressionProcesser.VariableReference. |
| * |
| * @since 1.1.0 |
| */ |
| public Object getValue(); |
| |
| /** |
| * Get the type of the proxy. |
| * @return |
| * |
| * @see InternalExpressionProxy#setProxy(Object, Class) for what type means. |
| * @since 1.1.0 |
| */ |
| public Class getType(); |
| |
| /** |
| * Return whether the proxy has had a value/class set into it yet. |
| * @return <code>true</code> if it has been set. |
| * |
| * @since 1.1.0 |
| */ |
| public boolean isSet(); |
| } |