Github user nickwallen commented on a diff in the pull request: https://github.com/apache/metron/pull/884#discussion_r160029261 --- Diff: metron-stellar/stellar-common/src/main/java/org/apache/metron/stellar/common/shell/specials/AssignmentCommand.java --- @@ -0,0 +1,85 @@ +/* + * 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.metron.stellar.common.shell.specials; + +import org.apache.metron.stellar.common.StellarAssignment; +import org.apache.metron.stellar.common.shell.StellarShellExecutor; +import org.apache.metron.stellar.common.shell.StellarResult; + +import java.util.Optional; +import java.util.function.Function; + +import static org.apache.metron.stellar.common.shell.StellarResult.error; + +/** + * A special command that allows for variable assignment. Variable + * assignment is not implemented directly within Stellar. + * + * x := 2 + 2 + */ +public class AssignmentCommand implements SpecialCommand { --- End diff -- Right, it is not. And that is one advantage of this design. Once #687 gets merged, all we have to do is remove this class.
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