Add Function4 and WrappedFunction4
Project: http://git-wip-us.apache.org/repos/asf/incubator-spark/repo Commit: http://git-wip-us.apache.org/repos/asf/incubator-spark/commit/de291c68 Tree: http://git-wip-us.apache.org/repos/asf/incubator-spark/tree/de291c68 Diff: http://git-wip-us.apache.org/repos/asf/incubator-spark/diff/de291c68 Branch: refs/heads/branch-0.8 Commit: de291c68879a79271dba060f7214db5759049a74 Parents: 987c613 Author: Xi Liu <x...@conviva.com> Authored: Wed Oct 9 14:58:51 2013 -0700 Committer: Xi Liu <x...@conviva.com> Committed: Wed Oct 9 14:58:51 2013 -0700 ---------------------------------------------------------------------- .../spark/api/java/function/Function4.java | 38 ++++++++++++++++++++ .../api/java/function/WrappedFunction4.scala | 32 +++++++++++++++++ 2 files changed, 70 insertions(+) ---------------------------------------------------------------------- http://git-wip-us.apache.org/repos/asf/incubator-spark/blob/de291c68/core/src/main/scala/org/apache/spark/api/java/function/Function4.java ---------------------------------------------------------------------- diff --git a/core/src/main/scala/org/apache/spark/api/java/function/Function4.java b/core/src/main/scala/org/apache/spark/api/java/function/Function4.java new file mode 100644 index 0000000..94621d7 --- /dev/null +++ b/core/src/main/scala/org/apache/spark/api/java/function/Function4.java @@ -0,0 +1,38 @@ +/* + * 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. + */ + +package org.apache.spark.api.java.function; + +import scala.reflect.ClassManifest; +import scala.reflect.ClassManifest$; +import scala.runtime.AbstractFunction3; + +import java.io.Serializable; + +/** + * A four-argument function that takes arguments of type T1, T2, T3, and T4 and returns an R. + */ +public abstract class Function4<T1, T2, T3, T4, R> extends WrappedFunction4<T1, T2, T3, T4, R> + implements Serializable { + + public abstract R call(T1 t1, T2 t2, T3 t3, T4 t4) throws Exception; + + public ClassManifest<R> returnType() { + return (ClassManifest<R>) ClassManifest$.MODULE$.fromClass(Object.class); + } +} + http://git-wip-us.apache.org/repos/asf/incubator-spark/blob/de291c68/core/src/main/scala/org/apache/spark/api/java/function/WrappedFunction4.scala ---------------------------------------------------------------------- diff --git a/core/src/main/scala/org/apache/spark/api/java/function/WrappedFunction4.scala b/core/src/main/scala/org/apache/spark/api/java/function/WrappedFunction4.scala new file mode 100644 index 0000000..29ba67f --- /dev/null +++ b/core/src/main/scala/org/apache/spark/api/java/function/WrappedFunction4.scala @@ -0,0 +1,32 @@ +/* + * 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. + */ + +package org.apache.spark.api.java.function + +import scala.runtime.AbstractFunction4 + +/** + * Subclass of Function4 for ease of calling from Java. The main thing it does is re-expose the + * apply() method as call() and declare that it can throw Exception (since AbstractFunction3.apply + * isn't marked to allow that). + */ +private[spark] abstract class WrappedFunction4[T1, T2, T3, T4, R] extends AbstractFunction4[T1, T2, T3, T4, R] { + @throws(classOf[Exception]) + def call(t1: T1, t2: T2, t3: T3, t4: T4): R + + final def apply(t1: T1, t2: T2, t3: T3, t4: T4): R = call(t1, t2, t3, t4) +}
