org.apache.crunch.impl.mr.plan.Vertex.java Source code

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Here is the source code for org.apache.crunch.impl.mr.plan.Vertex.java

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/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.crunch.impl.mr.plan;

import java.util.List;
import java.util.Set;

import org.apache.commons.lang.builder.ReflectionToStringBuilder;
import org.apache.commons.lang.builder.ToStringStyle;
import org.apache.crunch.Source;
import org.apache.crunch.impl.dist.collect.BaseGroupedTable;
import org.apache.crunch.impl.dist.collect.BaseInputCollection;
import org.apache.crunch.impl.dist.collect.PCollectionImpl;

import com.google.common.collect.Lists;
import com.google.common.collect.Sets;

/**
 *
 */
class Vertex {
    private final PCollectionImpl impl;

    private boolean output;
    private Set<Edge> incoming;
    private Set<Edge> outgoing;

    public Vertex(PCollectionImpl impl) {
        this.impl = impl;
        this.incoming = Sets.newHashSet();
        this.outgoing = Sets.newHashSet();
    }

    public PCollectionImpl getPCollection() {
        return impl;
    }

    public boolean isInput() {
        return impl instanceof BaseInputCollection;
    }

    public boolean isGBK() {
        return impl instanceof BaseGroupedTable;
    }

    public void setOutput() {
        this.output = true;
    }

    public boolean isOutput() {
        return output;
    }

    public Source getSource() {
        if (isInput()) {
            return ((BaseInputCollection) impl).getSource();
        }
        return null;
    }

    public void addIncoming(Edge edge) {
        this.incoming.add(edge);
    }

    public void addOutgoing(Edge edge) {
        this.outgoing.add(edge);
    }

    public List<Vertex> getAllNeighbors() {
        List<Vertex> n = Lists.newArrayList();
        for (Edge e : incoming) {
            n.add(e.getHead());
        }
        for (Edge e : outgoing) {
            n.add(e.getTail());
        }
        return n;
    }

    public Set<Edge> getIncomingEdges() {
        return incoming;
    }

    public Set<Edge> getOutgoingEdges() {
        return outgoing;
    }

    @Override
    public boolean equals(Object obj) {
        if (obj == null || !(obj instanceof Vertex)) {
            return false;
        }
        Vertex other = (Vertex) obj;
        return impl.equals(other.impl);
    }

    @Override
    public int hashCode() {
        return 17 + 37 * impl.hashCode();
    }

    @Override
    public String toString() {
        return new ReflectionToStringBuilder(this, ToStringStyle.SHORT_PREFIX_STYLE)
                .setExcludeFieldNames(new String[] { "outgoing", "incoming" }).toString();
    }
}