/*
* Copyright 2009-2013 Scale Unlimited
*
* 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 bixo.operations;
import com.scaleunlimited.cascading.NullContext;
import bixo.config.BixoPlatform;
import bixo.datum.UrlDatum;
import bixo.urls.BaseUrlNormalizer;
import cascading.flow.FlowProcess;
import cascading.operation.BaseOperation;
import cascading.operation.Function;
import cascading.operation.FunctionCall;
@SuppressWarnings("serial")
public class NormalizeUrlFunction extends BaseOperation<NullContext> implements Function<NullContext> {
private final BaseUrlNormalizer _normalizer;
public NormalizeUrlFunction(BaseUrlNormalizer normalizer) {
super(UrlDatum.FIELDS);
_normalizer = normalizer;
}
@SuppressWarnings("rawtypes")
@Override
public void operate(FlowProcess process, FunctionCall<NullContext> funCall) {
UrlDatum datum = new UrlDatum(funCall.getArguments());
// Create copy, since we're setting a field, and the tuple is going to be unmodifiable.
UrlDatum result = new UrlDatum(datum);
result.setUrl(_normalizer.normalize(datum.getUrl()));
funCall.getOutputCollector().add(BixoPlatform.clone(result.getTuple(), process));
}
}