forked from hadrienk/java-vtl
/
DataPointMap.java
89 lines (76 loc) · 2.72 KB
/
DataPointMap.java
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package no.ssb.vtl.script.operations;
/*-
* ========================LICENSE_START=================================
* Java VTL
* %%
* Copyright (C) 2016 - 2018 Hadrien Kohl
* %%
* 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.
* =========================LICENSE_END==================================
*/
import com.google.common.collect.ImmutableList;
import no.ssb.vtl.model.DataPoint;
import no.ssb.vtl.model.DataStructure;
import no.ssb.vtl.model.Dataset;
import no.ssb.vtl.model.VTLObject;
import java.util.function.ToIntFunction;
/**
* Wrapper class to access values of a DataPoint by column name.
*/
public class DataPointMap {
private final ToIntFunction<String> hash;
private DataPoint dataPoint;
public DataPointMap(ToIntFunction<String> hash) {
this.hash = hash;
}
public DataPointMap(DataStructure dataStructure) {
ImmutableList<String> indices = ImmutableList.copyOf(dataStructure.keySet());
this.hash = indices::indexOf;
}
public DataPointMap(Dataset dataset) {
DataStructure dataStructure = dataset.getDataStructure();
ImmutableList<String> indices = ImmutableList.copyOf(dataStructure.keySet());
this.hash = indices::indexOf;
}
/**
* Returns the current underlying Datapoint value.
*/
public DataPoint getDataPoint() {
return this.dataPoint;
}
/**
* Update the underlying Datapoint value.
*/
public void setDataPoint(DataPoint dataPoint) {
this.dataPoint = dataPoint;
}
/**
* Returns the element at the specified column in this list.
*
* @param column column of the element to return
* @return the element at the specified column
*/
public VTLObject get(String column) {
return this.dataPoint.get(hash.applyAsInt(column));
}
/**
* Replaces the element at the specified column with the specified element.
*
* @param column column of the element to replace.
* @param element element to be stored at the specified column
* @return the element previously at the specified position
*/
public VTLObject set(String column, VTLObject element) {
return this.dataPoint.set(hash.applyAsInt(column), element);
}
}