org.jgrapht.graph.UnmodifiableGraph Maven / Gradle / Ivy
/*
* (C) Copyright 2003-2017, by Barak Naveh and Contributors.
*
* JGraphT : a free Java graph-theory library
*
* This program and the accompanying materials are dual-licensed under
* either
*
* (a) the terms of the GNU Lesser General Public License version 2.1
* as published by the Free Software Foundation, or (at your option) any
* later version.
*
* or (per the licensee's choosing)
*
* (b) the terms of the Eclipse Public License v1.0 as published by
* the Eclipse Foundation.
*/
package org.jgrapht.graph;
import java.io.*;
import java.util.*;
import org.jgrapht.*;
/**
* An unmodifiable view of the backing graph specified in the constructor. This graph allows modules
* to provide users with "read-only" access to internal graphs. Query operations on this graph "read
* through" to the backing graph, and attempts to modify this graph result in an
* UnsupportedOperationException.
*
*
* This graph does not pass the hashCode and equals operations through to the backing graph,
* but relies on Object's equals and hashCode methods. This graph will be
* serializable if the backing graph is serializable.
*
*
* @param the graph vertex type
* @param the graph edge type
*
* @author Barak Naveh
* @since Jul 24, 2003
*/
public class UnmodifiableGraph
extends GraphDelegator
implements Serializable
{
private static final long serialVersionUID = 3544957670722713913L;
private static final String UNMODIFIABLE = "this graph is unmodifiable";
/**
* Creates a new unmodifiable graph based on the specified backing graph.
*
* @param g the backing graph on which an unmodifiable graph is to be created.
*/
public UnmodifiableGraph(Graph g)
{
super(g);
}
/**
* @see Graph#addEdge(Object, Object)
*/
@Override
public E addEdge(V sourceVertex, V targetVertex)
{
throw new UnsupportedOperationException(UNMODIFIABLE);
}
/**
* @see Graph#addEdge(Object, Object, Object)
*/
@Override
public boolean addEdge(V sourceVertex, V targetVertex, E e)
{
throw new UnsupportedOperationException(UNMODIFIABLE);
}
/**
* @see Graph#addVertex(Object)
*/
@Override
public boolean addVertex(V v)
{
throw new UnsupportedOperationException(UNMODIFIABLE);
}
/**
* @see Graph#removeAllEdges(Collection)
*/
@Override
public boolean removeAllEdges(Collection edges)
{
throw new UnsupportedOperationException(UNMODIFIABLE);
}
/**
* @see Graph#removeAllEdges(Object, Object)
*/
@Override
public Set removeAllEdges(V sourceVertex, V targetVertex)
{
throw new UnsupportedOperationException(UNMODIFIABLE);
}
/**
* @see Graph#removeAllVertices(Collection)
*/
@Override
public boolean removeAllVertices(Collection vertices)
{
throw new UnsupportedOperationException(UNMODIFIABLE);
}
/**
* @see Graph#removeEdge(Object)
*/
@Override
public boolean removeEdge(E e)
{
throw new UnsupportedOperationException(UNMODIFIABLE);
}
/**
* @see Graph#removeEdge(Object, Object)
*/
@Override
public E removeEdge(V sourceVertex, V targetVertex)
{
throw new UnsupportedOperationException(UNMODIFIABLE);
}
/**
* @see Graph#removeVertex(Object)
*/
@Override
public boolean removeVertex(V v)
{
throw new UnsupportedOperationException(UNMODIFIABLE);
}
}
// End UnmodifiableGraph.java