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fe/fe-core/src/main/java/org/apache/doris/qe/SessionVariableField.java
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// 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. | ||
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package org.apache.doris.qe; | ||
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import java.io.IOException; | ||
import java.io.ObjectInputStream; | ||
import java.io.ObjectOutputStream; | ||
import java.io.Serializable; | ||
import java.lang.reflect.Field; | ||
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public class SessionVariableField implements Serializable { | ||
private transient Field field; | ||
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public SessionVariableField(Field field) { | ||
this.field = field; | ||
} | ||
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public Field getField() { | ||
return field; | ||
} | ||
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private void writeObject(ObjectOutputStream out) throws IOException { | ||
out.defaultWriteObject(); | ||
out.writeObject(field.getName()); | ||
out.writeObject(field.getType()); | ||
} | ||
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private void readObject(ObjectInputStream in) throws IOException, ClassNotFoundException { | ||
in.defaultReadObject(); | ||
String fieldName = (String) in.readObject(); | ||
Class<?> fieldType = (Class<?>) in.readObject(); | ||
try { | ||
field = getField(fieldName, fieldType); | ||
} catch (NoSuchFieldException e) { | ||
e.printStackTrace(); | ||
} | ||
} | ||
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private Field getField(String fieldName, Class<?> fieldType) throws NoSuchFieldException { | ||
try { | ||
return SessionVariableField.class.getDeclaredField(fieldName); | ||
} catch (NoSuchFieldException e) { | ||
Class<?> superclass = SessionVariableField.class.getSuperclass(); | ||
if (superclass != null) { | ||
return getField(fieldName, fieldType); | ||
} | ||
throw e; | ||
} | ||
} | ||
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} |
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