Example usage for org.apache.hadoop.io Writable readFields

Introduction

In this page you can find the example usage for org.apache.hadoop.io Writable readFields.

Prototype

void readFields(DataInput in) throws IOException;

Source Link

Document

Deserialize the fields of this object from in.

Usage

From source file:org.sf.xrime.model.vertex.AdjBiSetVertex.java

License:Apache License

@SuppressWarnings("unchecked")
@Override/*  w  ww . j  av  a2 s .  com*/
public void readFields(DataInput in) throws IOException {
    // Call super first.
    super.readFields(in);
    // Clean containers.
    _forward_vertexes.clear();
    _backward_vertexes.clear();
    // Deal with forward vertex set.
    int size = in.readInt();
    if (size > 0) {
        // Determine the type of elements.
        String className = Text.readString(in);
        try {
            Class instanceClass = Class.forName(className);
            for (int ii = 0; ii < size; ii++) {
                Writable writable = WritableFactories.newInstance(instanceClass, null);
                writable.readFields(in);
                if (writable instanceof AdjVertexEdge) {
                    addForwardVertex((AdjVertexEdge) writable);
                }
            }
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        }
    }
    // Deal with backward vertex set.
    size = in.readInt();
    if (size > 0) {
        // Determine the type of elements.
        String className = Text.readString(in);
        Class instanceClass;
        try {
            instanceClass = Class.forName(className);
            for (int i = 0; i < size; i++) {
                Writable writable = WritableFactories.newInstance(instanceClass, null);
                writable.readFields(in);
                if (writable instanceof AdjVertexEdge) {
                    addBackwardVertex((AdjVertexEdge) writable);
                }
            }
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        }
    }
}

From source file:org.sf.xrime.model.vertex.AdjSetVertex.java

License:Apache License

@SuppressWarnings("unchecked")
public void readFields(DataInput in) throws IOException {
    // super./*from   w  w w.  j av  a  2  s .  c o m*/
    super.readFields(in);
    // Clear the container.
    opposites.clear();
    // Determine container size.
    int size = in.readInt();

    if (size > 0) {
        // Determine the element type.
        String className = Text.readString(in);
        try {
            for (int ii = 0; ii < size; ii++) {
                Class instanceClass = Class.forName(className);
                Writable writable = WritableFactories.newInstance(instanceClass, null);
                writable.readFields(in);
                if (writable instanceof AdjVertexEdge) {
                    addOpposite((AdjVertexEdge) writable);
                }
            }
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        }
    }
}

From source file:org.sf.xrime.model.vertex.AdjSetVertexWithTwoHopLabel.java

License:Apache License

@SuppressWarnings("unchecked")
public void readFields(DataInput in) throws IOException {
    // super.//www  .  j  a  va2 s.  com
    super.readFields(in);
    //System.out.println("Invoking readFields() for De-serialization, node = "+this.id);
    // Clear the container.
    neighbors.clear();
    allTwoHopNeighbors.clear();
    if (this.id.equals("")) {
        this.id = null;
    } else {
        // Determine container size.
        int size = in.readInt();
        //System.out.println("neighbors.size() = "+size);
        if (size > 0) {
            //Determine the element type, read neighbors
            String className = Text.readString(in);
            //System.out.println("ClassName = "+className);
            try {
                for (int ii = 0; ii < size; ii++) {
                    Class instanceClass = Class.forName(className);
                    Writable writable = WritableFactories.newInstance(instanceClass, null);
                    writable.readFields(in);
                    if (writable instanceof AdjVertexEdgeWithLabel) {
                        this.addNeighbor((AdjVertexEdgeWithLabel) writable);
                        //System.out.println("addNeighbor(): "+((AdjVertexEdgeWithLabel) writable).getOpposite());
                    }
                }
            } catch (ClassNotFoundException e) {
                e.printStackTrace();
            }

            // read two hop neighbors
            int mapSize = in.readInt();
            //System.out.println("twoHopNeihgbor map size = " + mapSize);
            while (mapSize > 0) {
                String currentKey = Text.readString(in);
                int neighborSize = in.readInt();
                if (neighborSize > 0) {
                    String currentClassName = Text.readString(in);
                    Set<AdjVertexEdgeWithLabel> currentTwoHopNeighbors = new TreeSet<AdjVertexEdgeWithLabel>(
                            new AdjVertexEdgeWithLabelComparator());
                    try {
                        for (int jj = 0; jj < neighborSize; jj++) {
                            Class currentInstanceClass = Class.forName(currentClassName);
                            Writable currentWritable = WritableFactories.newInstance(currentInstanceClass,
                                    null);
                            currentWritable.readFields(in);
                            if (currentWritable instanceof AdjVertexEdgeWithLabel) {
                                currentTwoHopNeighbors.add((AdjVertexEdgeWithLabel) currentWritable);
                            }
                        }
                    } catch (ClassNotFoundException e) {
                        e.printStackTrace();
                    }
                    allTwoHopNeighbors.put(currentKey, currentTwoHopNeighbors);
                    mapSize--;
                }
            }
        }
    }
}

From source file:org.sf.xrime.model.vertex.AdjVertex.java

License:Apache License

@SuppressWarnings("unchecked")
public void readFields(DataInput in) throws IOException {
    super.readFields(in);
    // Clear the container.
    edges.clear();//from ww w . j  av a2  s  .  c  o  m
    // Determine the size.
    int size = in.readInt();

    if (size > 0) {
        // Determine the element type.
        String className = Text.readString(in);
        try {
            for (int ii = 0; ii < size; ii++) {
                Class instanceClass = Class.forName(className);
                Writable writable = WritableFactories.newInstance(instanceClass, null);
                writable.readFields(in);
                if (writable instanceof Edge) {
                    addEdge((Edge) writable);
                }
            }
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        }
    }
}

From source file:org.sf.xrime.model.vertex.SetOfVertexSets.java

License:Apache License

@SuppressWarnings("unchecked")
@Override// ww  w .j av  a  2  s. c  om
public void readFields(DataInput in) throws IOException {
    // Clear the container.
    _the_set.clear();
    // Determine the size.
    int size = in.readInt();
    if (size > 0) {
        // All vertex sets in the set should have the same type.
        String className = Text.readString(in);
        try {
            Class instanceClass;
            instanceClass = Class.forName(className);
            for (int i = 0; i < size; i++) {
                Writable writable = WritableFactories.newInstance(instanceClass, null);
                writable.readFields(in);
                if (writable instanceof VertexSet) {
                    addVertexSet((VertexSet) writable);
                }
            }
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        }
    }
}

From source file:org.shaf.core.io.emulator.SequenceReader.java

License:Apache License

/**
 * Reads a {@link Record record} from the sequence file.
 *//* w w  w . ja v a  2  s.  c  o m*/
@Override
public Record<Writable, Writable> readRecord() throws IOException {
    try {
        Writable key = (Writable) this.keyClass.newInstance();
        key.readFields(super.in);

        Writable value = (Writable) this.valueClass.newInstance();
        value.readFields(super.in);

        return new Record<>(key, value);
    } catch (InstantiationException | IllegalAccessException exc) {
        throw new IOException("Invalid sequence file format.", exc);
    } catch (EOFException exc) {
        LOG.trace("The file reader reached the end of file.", exc);
        return null;
    }
}

From source file:utils.SerializationUtils.java

License:Apache License

private static Writable deserializeWritable(Writable writable, byte[] bytes) {
    try {//w w w.  ja  va2  s. com
        ByteArrayInputStream in = new ByteArrayInputStream(bytes);
        DataInputStream dataIn = new DataInputStream(in);
        writable.readFields(dataIn);
        dataIn.close();
        return writable;
    } catch (Exception ex) {
        throw Throwables.propagate(ex);
    }

}