package-info.java

/*
 * 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.
 */
/**
 * Defines {@link org.apache.beam.sdk.transforms.PTransform}s for transforming
 * data in a pipeline.
 *
 * <p>A {@link org.apache.beam.sdk.transforms.PTransform} is an operation that takes an
 * {@code InputT} (some subtype of {@link org.apache.beam.sdk.values.PInput})
 * and produces an
 * {@code OutputT} (some subtype of {@link org.apache.beam.sdk.values.POutput}).
 *
 * <p>Common PTransforms include root PTransforms like
 * {@link org.apache.beam.sdk.io.TextIO.Read} and
 * {@link org.apache.beam.sdk.transforms.Create}, processing and
 * conversion operations like {@link org.apache.beam.sdk.transforms.ParDo},
 * {@link org.apache.beam.sdk.transforms.GroupByKey},
 * {@link org.apache.beam.sdk.transforms.join.CoGroupByKey},
 * {@link org.apache.beam.sdk.transforms.Combine}, and
 * {@link org.apache.beam.sdk.transforms.Count}, and outputting
 * PTransforms like
 * {@link org.apache.beam.sdk.io.TextIO.Write}.
 *
 * <p>New PTransforms can be created by composing existing PTransforms.
 * Most PTransforms in this package are composites, and users can also create composite PTransforms
 * for their own application-specific logic.
 *
 */
package org.apache.beam.sdk.transforms;