/*******************************************************************************
* Copyright (c) 2002 - 2006 IBM Corporation.
* 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 com.ibm.wala.ipa.callgraph;
import com.ibm.wala.classLoader.IClass;
import com.ibm.wala.classLoader.NewSiteReference;
/**
* This interface represents policies for selecting a class to allocate at a given new site. The most obvious such policy would be
* to look at the relevant class hierarchy and lookup the appropriate class based on the type reference at the new site. However,
* other policies are possible for purposes such as providing an abstraction of unanalyzed libraries or specialized J2EE
* functionality.
*
* Such policies are consulted by the different analysis mechanisms, both the flow-based and non-flow algorithms. The current
* mechanism is that the policy object are registered with the AnalysisOptions object, and all analyses that need to analyze
* allocations ask that object for the class selector to use.
*
* In general, for specialized selectors, it is good practice to build selectors that handle the special case of interest, and
* otherwise delegate to a child selector. When registering with the AnalysisOptions object, make the child selector be whatever the
* options object had before.
*/
public interface ClassTargetSelector {
/**
* Given a calling node and a new site, return the type to be allocated.
*
* @param caller the GCNode in the call graph containing the new site.
* @param site the new site reference of the new site.
* @return the class to be allocated.
*/
IClass getAllocatedTarget(CGNode caller, NewSiteReference site);
}