Java Code Examples for org.apache.flink.api.java.typeutils.TypeExtractor#getGroupReduceReturnTypes()

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Example 1
Source Project: Flink-CEPplus   File: UnsortedGrouping.java    License: Apache License 2.0 3 votes vote down vote up
/**
 * Applies a GroupReduce transformation on a grouped {@link DataSet}.
 *
 * <p>The transformation calls a {@link org.apache.flink.api.common.functions.RichGroupReduceFunction} for each group of the DataSet.
 * A GroupReduceFunction can iterate over all elements of a group and emit any
 *   number of output elements including none.
 *
 * @param reducer The GroupReduceFunction that is applied on each group of the DataSet.
 * @return A GroupReduceOperator that represents the reduced DataSet.
 *
 * @see org.apache.flink.api.common.functions.RichGroupReduceFunction
 * @see GroupReduceOperator
 * @see DataSet
 */
public <R> GroupReduceOperator<T, R> reduceGroup(GroupReduceFunction<T, R> reducer) {
	if (reducer == null) {
		throw new NullPointerException("GroupReduce function must not be null.");
	}
	TypeInformation<R> resultType = TypeExtractor.getGroupReduceReturnTypes(reducer,
			this.getInputDataSet().getType(), Utils.getCallLocationName(), true);

	return new GroupReduceOperator<T, R>(this, resultType, inputDataSet.clean(reducer), Utils.getCallLocationName());
}
 
Example 2
Source Project: Flink-CEPplus   File: SortedGrouping.java    License: Apache License 2.0 3 votes vote down vote up
/**
 * Applies a GroupReduce transformation on a grouped and sorted {@link DataSet}.
 *
 * <p>The transformation calls a {@link org.apache.flink.api.common.functions.RichGroupReduceFunction} for each group of the DataSet.
 * A GroupReduceFunction can iterate over all elements of a group and emit any
 *   number of output elements including none.
 *
 * @param reducer The GroupReduceFunction that is applied on each group of the DataSet.
 * @return A GroupReduceOperator that represents the reduced DataSet.
 *
 * @see org.apache.flink.api.common.functions.RichGroupReduceFunction
 * @see GroupReduceOperator
 * @see DataSet
 */
public <R> GroupReduceOperator<T, R> reduceGroup(GroupReduceFunction<T, R> reducer) {
	if (reducer == null) {
		throw new NullPointerException("GroupReduce function must not be null.");
	}
	TypeInformation<R> resultType = TypeExtractor.getGroupReduceReturnTypes(reducer,
			inputDataSet.getType(), Utils.getCallLocationName(), true);
	return new GroupReduceOperator<>(this, resultType, inputDataSet.clean(reducer), Utils.getCallLocationName());
}
 
Example 3
Source Project: Flink-CEPplus   File: DataSet.java    License: Apache License 2.0 3 votes vote down vote up
/**
 * Applies a GroupReduce transformation on a non-grouped {@link DataSet}.
 *
 * <p>The transformation calls a {@link org.apache.flink.api.common.functions.RichGroupReduceFunction} once with the full DataSet.
 * The GroupReduceFunction can iterate over all elements of the DataSet and emit any
 *   number of output elements including none.
 *
 * @param reducer The GroupReduceFunction that is applied on the DataSet.
 * @return A GroupReduceOperator that represents the reduced DataSet.
 *
 * @see org.apache.flink.api.common.functions.RichGroupReduceFunction
 * @see org.apache.flink.api.java.operators.GroupReduceOperator
 * @see DataSet
 */
public <R> GroupReduceOperator<T, R> reduceGroup(GroupReduceFunction<T, R> reducer) {
	if (reducer == null) {
		throw new NullPointerException("GroupReduce function must not be null.");
	}

	String callLocation = Utils.getCallLocationName();
	TypeInformation<R> resultType = TypeExtractor.getGroupReduceReturnTypes(reducer, getType(), callLocation, true);
	return new GroupReduceOperator<>(this, resultType, clean(reducer), callLocation);
}
 
Example 4
Source Project: flink   File: UnsortedGrouping.java    License: Apache License 2.0 3 votes vote down vote up
/**
 * Applies a GroupReduce transformation on a grouped {@link DataSet}.
 *
 * <p>The transformation calls a {@link org.apache.flink.api.common.functions.RichGroupReduceFunction} for each group of the DataSet.
 * A GroupReduceFunction can iterate over all elements of a group and emit any
 *   number of output elements including none.
 *
 * @param reducer The GroupReduceFunction that is applied on each group of the DataSet.
 * @return A GroupReduceOperator that represents the reduced DataSet.
 *
 * @see org.apache.flink.api.common.functions.RichGroupReduceFunction
 * @see GroupReduceOperator
 * @see DataSet
 */
public <R> GroupReduceOperator<T, R> reduceGroup(GroupReduceFunction<T, R> reducer) {
	if (reducer == null) {
		throw new NullPointerException("GroupReduce function must not be null.");
	}
	TypeInformation<R> resultType = TypeExtractor.getGroupReduceReturnTypes(reducer,
			this.getInputDataSet().getType(), Utils.getCallLocationName(), true);

	return new GroupReduceOperator<T, R>(this, resultType, inputDataSet.clean(reducer), Utils.getCallLocationName());
}
 
Example 5
Source Project: flink   File: SortedGrouping.java    License: Apache License 2.0 3 votes vote down vote up
/**
 * Applies a GroupReduce transformation on a grouped and sorted {@link DataSet}.
 *
 * <p>The transformation calls a {@link org.apache.flink.api.common.functions.RichGroupReduceFunction} for each group of the DataSet.
 * A GroupReduceFunction can iterate over all elements of a group and emit any
 *   number of output elements including none.
 *
 * @param reducer The GroupReduceFunction that is applied on each group of the DataSet.
 * @return A GroupReduceOperator that represents the reduced DataSet.
 *
 * @see org.apache.flink.api.common.functions.RichGroupReduceFunction
 * @see GroupReduceOperator
 * @see DataSet
 */
public <R> GroupReduceOperator<T, R> reduceGroup(GroupReduceFunction<T, R> reducer) {
	if (reducer == null) {
		throw new NullPointerException("GroupReduce function must not be null.");
	}
	TypeInformation<R> resultType = TypeExtractor.getGroupReduceReturnTypes(reducer,
			inputDataSet.getType(), Utils.getCallLocationName(), true);
	return new GroupReduceOperator<>(this, resultType, inputDataSet.clean(reducer), Utils.getCallLocationName());
}
 
Example 6
Source Project: flink   File: DataSet.java    License: Apache License 2.0 3 votes vote down vote up
/**
 * Applies a GroupReduce transformation on a non-grouped {@link DataSet}.
 *
 * <p>The transformation calls a {@link org.apache.flink.api.common.functions.RichGroupReduceFunction} once with the full DataSet.
 * The GroupReduceFunction can iterate over all elements of the DataSet and emit any
 *   number of output elements including none.
 *
 * @param reducer The GroupReduceFunction that is applied on the DataSet.
 * @return A GroupReduceOperator that represents the reduced DataSet.
 *
 * @see org.apache.flink.api.common.functions.RichGroupReduceFunction
 * @see org.apache.flink.api.java.operators.GroupReduceOperator
 * @see DataSet
 */
public <R> GroupReduceOperator<T, R> reduceGroup(GroupReduceFunction<T, R> reducer) {
	if (reducer == null) {
		throw new NullPointerException("GroupReduce function must not be null.");
	}

	String callLocation = Utils.getCallLocationName();
	TypeInformation<R> resultType = TypeExtractor.getGroupReduceReturnTypes(reducer, getType(), callLocation, true);
	return new GroupReduceOperator<>(this, resultType, clean(reducer), callLocation);
}
 
Example 7
Source Project: flink   File: UnsortedGrouping.java    License: Apache License 2.0 3 votes vote down vote up
/**
 * Applies a GroupReduce transformation on a grouped {@link DataSet}.
 *
 * <p>The transformation calls a {@link org.apache.flink.api.common.functions.RichGroupReduceFunction} for each group of the DataSet.
 * A GroupReduceFunction can iterate over all elements of a group and emit any
 *   number of output elements including none.
 *
 * @param reducer The GroupReduceFunction that is applied on each group of the DataSet.
 * @return A GroupReduceOperator that represents the reduced DataSet.
 *
 * @see org.apache.flink.api.common.functions.RichGroupReduceFunction
 * @see GroupReduceOperator
 * @see DataSet
 */
public <R> GroupReduceOperator<T, R> reduceGroup(GroupReduceFunction<T, R> reducer) {
	if (reducer == null) {
		throw new NullPointerException("GroupReduce function must not be null.");
	}
	TypeInformation<R> resultType = TypeExtractor.getGroupReduceReturnTypes(reducer,
			this.getInputDataSet().getType(), Utils.getCallLocationName(), true);

	return new GroupReduceOperator<T, R>(this, resultType, inputDataSet.clean(reducer), Utils.getCallLocationName());
}
 
Example 8
Source Project: flink   File: SortedGrouping.java    License: Apache License 2.0 3 votes vote down vote up
/**
 * Applies a GroupReduce transformation on a grouped and sorted {@link DataSet}.
 *
 * <p>The transformation calls a {@link org.apache.flink.api.common.functions.RichGroupReduceFunction} for each group of the DataSet.
 * A GroupReduceFunction can iterate over all elements of a group and emit any
 *   number of output elements including none.
 *
 * @param reducer The GroupReduceFunction that is applied on each group of the DataSet.
 * @return A GroupReduceOperator that represents the reduced DataSet.
 *
 * @see org.apache.flink.api.common.functions.RichGroupReduceFunction
 * @see GroupReduceOperator
 * @see DataSet
 */
public <R> GroupReduceOperator<T, R> reduceGroup(GroupReduceFunction<T, R> reducer) {
	if (reducer == null) {
		throw new NullPointerException("GroupReduce function must not be null.");
	}
	TypeInformation<R> resultType = TypeExtractor.getGroupReduceReturnTypes(reducer,
			inputDataSet.getType(), Utils.getCallLocationName(), true);
	return new GroupReduceOperator<>(this, resultType, inputDataSet.clean(reducer), Utils.getCallLocationName());
}
 
Example 9
Source Project: flink   File: DataSet.java    License: Apache License 2.0 3 votes vote down vote up
/**
 * Applies a GroupReduce transformation on a non-grouped {@link DataSet}.
 *
 * <p>The transformation calls a {@link org.apache.flink.api.common.functions.RichGroupReduceFunction} once with the full DataSet.
 * The GroupReduceFunction can iterate over all elements of the DataSet and emit any
 *   number of output elements including none.
 *
 * @param reducer The GroupReduceFunction that is applied on the DataSet.
 * @return A GroupReduceOperator that represents the reduced DataSet.
 *
 * @see org.apache.flink.api.common.functions.RichGroupReduceFunction
 * @see org.apache.flink.api.java.operators.GroupReduceOperator
 * @see DataSet
 */
public <R> GroupReduceOperator<T, R> reduceGroup(GroupReduceFunction<T, R> reducer) {
	if (reducer == null) {
		throw new NullPointerException("GroupReduce function must not be null.");
	}

	String callLocation = Utils.getCallLocationName();
	TypeInformation<R> resultType = TypeExtractor.getGroupReduceReturnTypes(reducer, getType(), callLocation, true);
	return new GroupReduceOperator<>(this, resultType, clean(reducer), callLocation);
}