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/*
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* Copyright (c) 1998, 2017, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package com.sun.jdi;
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import com.sun.jdi.request.BreakpointRequest;
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/**
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* A proxy used by a debugger to examine or manipulate some entity
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* in another virtual machine. Mirror is the root of the
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* interface hierarchy for this package. Mirrors can be proxies for objects
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* in the target VM ({@link ObjectReference}), primitive values
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* (for example, {@link IntegerValue}), types (for example,
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* {@link ReferenceType}), dynamic application state (for example,
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* {@link StackFrame}), and even debugger-specific constructs (for example,
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* {@link BreakpointRequest}).
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* The {@link VirtualMachine} itself is also considered a mirror,
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* representing the composite state of the target VM.
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* <P>
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* There is no guarantee that a particular entity in the target VM will map
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* to a single instance of Mirror. Implementors are free to decide
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* whether a single mirror will be used for some or all mirrors. Clients
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* of this interface should always use <code>equals</code> to compare
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* two mirrors for equality.
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* <p>
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* Any method on a {@link Mirror} that takes a <code>Mirror</code> as an
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* parameter directly or indirectly (e.g., as a element in a <code>List</code>) will
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* throw {@link VMMismatchException} if the mirrors are from different
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* virtual machines.
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*
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* @see VirtualMachine
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*
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* @author Robert Field
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* @author Gordon Hirsch
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* @author James McIlree
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* @since 1.3
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*/
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public interface Mirror {
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/**
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* Gets the VirtualMachine to which this
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* Mirror belongs. A Mirror must be associated
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* with a VirtualMachine to have any meaning.
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*
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* @return the {@link VirtualMachine} for which this mirror is a proxy.
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*/
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VirtualMachine virtualMachine();
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/**
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* Returns a String describing this mirror
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*
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* @return a string describing this mirror.
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*/
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String toString();
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}
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