org.apache.flink.api.java.operators.CoGroupOperator.CoGroupOperatorSets Java Examples

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Example #1
Source File: DataSet.java    From Flink-CEPplus with Apache License 2.0 2 votes vote down vote up 
/**
 * Initiates a CoGroup transformation.
 *
 * <p>A CoGroup transformation combines the elements of
 *   two {@link DataSet DataSets} into one DataSet. It groups each DataSet individually on a key and
 *   gives groups of both DataSets with equal keys together into a {@link org.apache.flink.api.common.functions.RichCoGroupFunction}.
 *   If a DataSet has a group with no matching key in the other DataSet, the CoGroupFunction
 *   is called with an empty group for the non-existing group.
 *
 * <p>The CoGroupFunction can iterate over the elements of both groups and return any number
 *   of elements including none.
 *
 * <p>This method returns a {@link CoGroupOperatorSets} on which one of the {@code where} methods
 * can be called to define the join key of the first joining (i.e., this) DataSet.
 *
 * @param other The other DataSet of the CoGroup transformation.
 * @return A CoGroupOperatorSets to continue the definition of the CoGroup transformation.
 *
 * @see CoGroupOperatorSets
 * @see CoGroupOperator
 * @see DataSet
 */
public <R> CoGroupOperator.CoGroupOperatorSets<T, R> coGroup(DataSet<R> other) {
	return new CoGroupOperator.CoGroupOperatorSets<>(this, other);
}
Example #2
Source File: DataSet.java    From flink with Apache License 2.0 2 votes vote down vote up 
/**
 * Initiates a CoGroup transformation.
 *
 * <p>A CoGroup transformation combines the elements of
 *   two {@link DataSet DataSets} into one DataSet. It groups each DataSet individually on a key and
 *   gives groups of both DataSets with equal keys together into a {@link org.apache.flink.api.common.functions.RichCoGroupFunction}.
 *   If a DataSet has a group with no matching key in the other DataSet, the CoGroupFunction
 *   is called with an empty group for the non-existing group.
 *
 * <p>The CoGroupFunction can iterate over the elements of both groups and return any number
 *   of elements including none.
 *
 * <p>This method returns a {@link CoGroupOperatorSets} on which one of the {@code where} methods
 * can be called to define the join key of the first joining (i.e., this) DataSet.
 *
 * @param other The other DataSet of the CoGroup transformation.
 * @return A CoGroupOperatorSets to continue the definition of the CoGroup transformation.
 *
 * @see CoGroupOperatorSets
 * @see CoGroupOperator
 * @see DataSet
 */
public <R> CoGroupOperator.CoGroupOperatorSets<T, R> coGroup(DataSet<R> other) {
	return new CoGroupOperator.CoGroupOperatorSets<>(this, other);
}
Example #3
Source File: DataSet.java    From flink with Apache License 2.0 2 votes vote down vote up 
/**
 * Initiates a CoGroup transformation.
 *
 * <p>A CoGroup transformation combines the elements of
 *   two {@link DataSet DataSets} into one DataSet. It groups each DataSet individually on a key and
 *   gives groups of both DataSets with equal keys together into a {@link org.apache.flink.api.common.functions.RichCoGroupFunction}.
 *   If a DataSet has a group with no matching key in the other DataSet, the CoGroupFunction
 *   is called with an empty group for the non-existing group.
 *
 * <p>The CoGroupFunction can iterate over the elements of both groups and return any number
 *   of elements including none.
 *
 * <p>This method returns a {@link CoGroupOperatorSets} on which one of the {@code where} methods
 * can be called to define the join key of the first joining (i.e., this) DataSet.
 *
 * @param other The other DataSet of the CoGroup transformation.
 * @return A CoGroupOperatorSets to continue the definition of the CoGroup transformation.
 *
 * @see CoGroupOperatorSets
 * @see CoGroupOperator
 * @see DataSet
 */
public <R> CoGroupOperator.CoGroupOperatorSets<T, R> coGroup(DataSet<R> other) {
	return new CoGroupOperator.CoGroupOperatorSets<>(this, other);
}