Example usage for org.apache.commons.collections15 CollectionUtils unmodifiableCollection

Introduction

In this page you can find the example usage for org.apache.commons.collections15 CollectionUtils unmodifiableCollection.

Prototype

public static <E> Collection<E> unmodifiableCollection(Collection<E> collection) 

Source Link

Document

Returns an unmodifiable collection backed by the given collection.

Usage

From source file:edu.uci.ics.jung.graph.OrderedKAryTree.java

/**
 * @see edu.uci.ics.jung.graph.Tree#getChildEdges(java.lang.Object)
 *//*from   ww w.  j  a  v  a2  s  .com*/
public Collection<E> getChildEdges(V vertex) {
    if (!containsVertex(vertex))
        return null;
    List<E> edges = vertex_data.get(vertex).child_edges;
    return edges == null ? Collections.<E>emptySet() : CollectionUtils.unmodifiableCollection(edges);
}

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From source file:edu.uci.ics.jung.graph.OrderedKAryTree.java

/**
 * Returns an ordered list of {@code vertex}'s child vertices.
 * If there is no child in position i, then the list will contain
 * {@code null} in position i.  If {@code vertex} has no children
 * then the empty set will be returned./*from w  w w . j  a v a 2  s  .co m*/
 * @see edu.uci.ics.jung.graph.Tree#getChildren(java.lang.Object)
 */
public Collection<V> getChildren(V vertex) {
    if (!containsVertex(vertex))
        return null;
    List<E> edges = vertex_data.get(vertex).child_edges;
    if (edges == null)
        return Collections.emptySet();
    Collection<V> children = new ArrayList<V>(order);
    for (E edge : edges)
        children.add(this.getOpposite(vertex, edge));
    return CollectionUtils.unmodifiableCollection(children);
}

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From source file:edu.uci.ics.jung.graph.OrderedKAryTree.java

/**
 * @see edu.uci.ics.jung.graph.Hypergraph#getEdges()
 */
public Collection<E> getEdges() {
    return CollectionUtils.unmodifiableCollection(edge_vpairs.keySet());
}

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From source file:edu.uci.ics.jung.graph.OrderedKAryTree.java

/**
 * @see edu.uci.ics.jung.graph.Hypergraph#getVertices()
 */
public Collection<V> getVertices() {
    return CollectionUtils.unmodifiableCollection(vertex_data.keySet());
}

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