Example usage for org.apache.commons.collections CollectionUtils unmodifiableCollection

Introduction

In this page you can find the example usage for org.apache.commons.collections CollectionUtils unmodifiableCollection.

Prototype

public static Collection unmodifiableCollection(Collection collection) 

Source Link

Document

Returns an unmodifiable collection backed by the given collection.

Usage

From source file:scratch.joshua.jung_2_0.core.SimpleDirectedSparseGraph.java

public Collection<V> getSuccessors(V vertex) {
    Set<E> outgoing = vertices.get(vertex).getSecond();
    Set<V> succs = new HashSet();
    for (E edge : outgoing)
        succs.add(this.getDest(edge));

    return CollectionUtils.unmodifiableCollection(succs);
}

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From source file:scratch.joshua.jung_2_0.core.SimpleUndirectedSparseGraph.java

public Collection<E> getEdges() {
    return CollectionUtils.unmodifiableCollection(edges.keySet());
}

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From source file:scratch.joshua.jung_2_0.core.SimpleUndirectedSparseGraph.java

public Collection<V> getVertices() {
    return CollectionUtils.unmodifiableCollection(vertices.keySet());
}

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From source file:scratch.joshua.jung_2_0.core.SimpleUndirectedSparseGraph.java

public Collection<V> getNeighbors(V vertex) {
    Set<E> incident_edges = vertices.get(vertex);
    Set<V> neighbors = new HashSet<V>();
    for (E edge : incident_edges) {
        Pair<V> endpoints = this.getEndpoints(edge);
        V e_a = endpoints.getFirst();/*w  ww .ja v a2  s . co  m*/
        V e_b = endpoints.getSecond();
        if (vertex.equals(e_a))
            neighbors.add(e_b);
        else
            neighbors.add(e_a);
    }

    return CollectionUtils.unmodifiableCollection(neighbors);
}

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From source file:scratch.joshua.jung_2_0.core.SimpleUndirectedSparseGraph.java

public Collection<E> getIncidentEdges(V vertex) {
    return CollectionUtils.unmodifiableCollection((Set) vertices.get(vertex));
}

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