hadoop DeepCompare 源码
haddop DeepCompare 代码
文件路径：/hadoop-tools/hadoop-rumen/src/main/java/org/apache/hadoop/tools/rumen/DeepCompare.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.
*/
package org.apache.hadoop.tools.rumen;
/**
* Classes that implement this interface can deep-compare [for equality only,
* not order] with another instance. They do a deep compare. If there is any
* semantically significant difference, an implementer throws an Exception to be
* thrown with a chain of causes describing the chain of field references and
* indices that get you to the miscompared point.
*
*/
public interface DeepCompare {
/**
* @param other
* the other comparand that's being compared to me
* @param myLocation
* the path that got to me. In the root, myLocation is null. To
* process the scalar {@code foo} field of the root we will make a
* recursive call with a {@link TreePath} whose {@code fieldName} is
* {@code "bar"} and whose {@code index} is -1 and whose {@code
* parent} is {@code null}. To process the plural {@code bar} field
* of the root we will make a recursive call with a {@link TreePath}
* whose fieldName is {@code "foo"} and whose {@code index} is -1 and
* whose {@code parent} is also {@code null}.
* @throws DeepInequalityException
*/
public void deepCompare(DeepCompare other, TreePath myLocation)
throws DeepInequalityException;
}
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