Example usage for org.apache.hadoop.io WritableFactories newInstance

Introduction

In this page you can find the example usage for org.apache.hadoop.io WritableFactories newInstance.

Prototype

public static Writable newInstance(Class<? extends Writable> c) 

Source Link

Document

Create a new instance of a class with a defined factory.

Usage

From source file:org.apache.flink.hadoopcompatibility.mapreduce.wrapper.HadoopInputSplit.java

License:Apache License

@Override
public void read(DataInputView in) throws IOException {
    this.splitNumber = in.readInt();
    String className = in.readUTF();

    if (this.mapreduceInputSplit == null) {
        try {//from   ww w . jav  a2s . c  o  m
            Class<? extends org.apache.hadoop.io.Writable> inputSplit = Class.forName(className)
                    .asSubclass(org.apache.hadoop.io.Writable.class);
            this.mapreduceInputSplit = (org.apache.hadoop.mapreduce.InputSplit) WritableFactories
                    .newInstance(inputSplit);
        } catch (Exception e) {
            throw new RuntimeException("Unable to create InputSplit", e);
        }
    }
    ((Writable) this.mapreduceInputSplit).readFields(in);
}

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From source file:org.apache.giraph.utils.ArrayWritable.java

License:Apache License

@Override
public void readFields(DataInput in) throws IOException {
    valueClass = WritableUtils.readClass(in);
    values = (T[]) Array.newInstance(valueClass, in.readInt());

    for (int i = 0; i < values.length; i++) {
        T value = (T) WritableFactories.newInstance(valueClass);
        value.readFields(in); // read a value
        values[i] = value; // store it in values
    }/*  w w  w  .j  av a 2  s. c o m*/
}

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From source file:org.kiji.hive.io.KijiRowDataWritable.java

License:Apache License

@Override
public void readFields(DataInput in) throws IOException {
    EntityIdWritable entityIdWritable = (EntityIdWritable) WritableFactories
            .newInstance(EntityIdWritable.class);
    entityIdWritable.readFields(in);/*from  w  w  w .  j  ava  2 s  . co m*/
    mEntityId = entityIdWritable;

    int numDecodedData = WritableUtils.readVInt(in);

    // We need to dirty the decoded data so that these objects can be reused.
    mDecodedData = null;

    mWritableData = Maps.newHashMap();
    for (int c = 0; c < numDecodedData; c++) {
        String columnText = WritableUtils.readString(in);
        KijiColumnName column = new KijiColumnName(columnText);

        NavigableMap<Long, KijiCellWritable> data = Maps.newTreeMap();
        int numCells = WritableUtils.readVInt(in);
        for (int d = 0; d < numCells; d++) {
            long ts = WritableUtils.readVLong(in);
            KijiCellWritable cellWritable = (KijiCellWritable) WritableFactories
                    .newInstance(KijiCellWritable.class);
            cellWritable.readFields(in);
            data.put(ts, cellWritable);
        }

        mWritableData.put(column, data);
    }

    mSchemas = Maps.newHashMap();
    int numSchemas = WritableUtils.readVInt(in);
    for (int c = 0; c < numSchemas; c++) {
        String columnText = WritableUtils.readString(in);
        KijiColumnName column = new KijiColumnName(columnText);
        String schemaString = WritableUtils.readString(in);
        Schema schema = new Schema.Parser().parse(schemaString);
        mSchemas.put(column, schema);
    }
}

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From source file:org.megalon.MArrayWritable.java

License:Apache License

public void readFields(DataInput in) throws IOException {
    // values = new Writable[in.readInt()]; // construct values
    values = (Writable[]) Array.newInstance(valueClass, in.readInt());
    for (int i = 0; i < values.length; i++) {
        Writable value = WritableFactories.newInstance(valueClass);
        value.readFields(in); // read a value
        values[i] = value; // store it in values
    }//  w w  w  .  j  av a 2s .  c o  m
}

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From source file:org.zuinnote.hadoop.office.format.common.dao.SpreadSheetCellDAO.java

License:Apache License

@Override
public void readFields(DataInput dataInput) throws IOException {
    Text formattedValueText = (Text) WritableFactories.newInstance(Text.class);
    formattedValueText.readFields(dataInput);
    this.formattedValue = formattedValueText.toString();
    Text commentText = (Text) WritableFactories.newInstance(Text.class);
    commentText.readFields(dataInput);//from   w w w. j  a v  a2  s.co m
    this.comment = commentText.toString();
    Text formulaText = (Text) WritableFactories.newInstance(Text.class);
    formulaText.readFields(dataInput);
    this.formula = formulaText.toString();
    Text addressText = (Text) WritableFactories.newInstance(Text.class);
    addressText.readFields(dataInput);
    this.address = addressText.toString();
    Text sheetNameText = (Text) WritableFactories.newInstance(Text.class);
    sheetNameText.readFields(dataInput);
    this.sheetName = sheetNameText.toString();
}

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