com.streamsets.pipeline.api.interceptor.BaseInterceptor Maven / Gradle / Ivy
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/*
* Copyright 2018 StreamSets Inc.
*
* Licensed 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 com.streamsets.pipeline.api.interceptor;
import com.streamsets.pipeline.api.ConfigIssue;
import java.util.Collections;
import java.util.List;
import java.util.Map;
public abstract class BaseInterceptor implements Interceptor {
/**
* Context associated with this instance.
*/
private Interceptor.Context context;
/**
* Returns the interceptor context.
*/
protected Interceptor.Context getContext() {
return context;
}
/**
* Initialize the interceptor. This method should not be overridden by subclasses, instead the
* init(Map) should be used (overridden)
*/
@Override
public List init(Context context) {
this.context = context;
return init();
}
/**
* Initializes the interceptor. Subclasses should override this method for initialization.
*
* This implementation is a no-operation.
*/
protected List init() {
return Collections.emptyList();
}
/**
* Default implementation of destroy does not do anything.
*/
@Override
public void destroy() {
}
}