| /* |
| * 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.druid.segment.selector; |
| |
| import org.apache.druid.query.dimension.DimensionSpec; |
| import org.apache.druid.query.monomorphicprocessing.RuntimeShapeInspector; |
| import org.apache.druid.segment.ColumnSelectorFactory; |
| import org.apache.druid.segment.ColumnValueSelector; |
| import org.apache.druid.segment.Cursor; |
| import org.apache.druid.segment.DimensionSelector; |
| import org.apache.druid.segment.column.ColumnCapabilities; |
| import org.joda.time.DateTime; |
| |
| import javax.annotation.Nullable; |
| import java.util.Collection; |
| import java.util.Iterator; |
| import java.util.function.Supplier; |
| import java.util.stream.Stream; |
| |
| public class TestColumnValueSelector<T> implements ColumnValueSelector<Object>, Cursor |
| { |
| private final Class<T> clazz; |
| private final Supplier<Iterator<Object>> iteratorSupplier; |
| private final DateTime time; |
| |
| private Iterator<Object> iterator; |
| private Object value; |
| |
| public static <T> TestColumnValueSelector<T> of(Class<T> clazz, Collection<Object> collection, DateTime time) |
| { |
| return new TestColumnValueSelector<>(clazz, collection::iterator, time); |
| } |
| |
| public static <T> TestColumnValueSelector<T> of(Class<T> clazz, Stream<Object> stream, DateTime time) |
| { |
| return new TestColumnValueSelector<>(clazz, stream::iterator, time); |
| } |
| |
| protected TestColumnValueSelector(Class<T> clazz, Supplier<Iterator<Object>> iteratorSupplier, DateTime time) |
| { |
| this.clazz = clazz; |
| this.iteratorSupplier = iteratorSupplier; |
| this.time = time; |
| this.iterator = iteratorSupplier.get(); |
| } |
| |
| @Override |
| public ColumnSelectorFactory getColumnSelectorFactory() |
| { |
| return new ColumnSelectorFactory() |
| { |
| @Override |
| public DimensionSelector makeDimensionSelector(DimensionSpec dimensionSpec) |
| { |
| throw new UnsupportedOperationException("Not implemented"); |
| } |
| |
| @Override |
| public ColumnValueSelector makeColumnValueSelector(String columnName) |
| { |
| return TestColumnValueSelector.this; |
| } |
| |
| @Nullable |
| @Override |
| public ColumnCapabilities getColumnCapabilities(String column) |
| { |
| return null; |
| } |
| }; |
| } |
| |
| @Override |
| public DateTime getTime() |
| { |
| return time; |
| } |
| |
| @Override |
| public void advance() |
| { |
| value = iterator.next(); |
| } |
| |
| @Override |
| public void advanceUninterruptibly() |
| { |
| advance(); |
| } |
| |
| @Override |
| public boolean isDone() |
| { |
| return !iterator.hasNext(); |
| } |
| |
| @Override |
| public boolean isDoneOrInterrupted() |
| { |
| return isDone(); |
| } |
| |
| @Override |
| public void reset() |
| { |
| iterator = iteratorSupplier.get(); |
| } |
| |
| @Override |
| public double getDouble() |
| { |
| if (value instanceof Number) { |
| return ((Number) value).doubleValue(); |
| } else { |
| return Double.parseDouble(value.toString()); |
| } |
| } |
| |
| @Override |
| public float getFloat() |
| { |
| if (value instanceof Number) { |
| return ((Number) value).floatValue(); |
| } else { |
| return Float.parseFloat(value.toString()); |
| } |
| } |
| |
| @Override |
| public long getLong() |
| { |
| if (value instanceof Number) { |
| return ((Number) value).longValue(); |
| } else { |
| return Long.parseLong(value.toString()); |
| } |
| } |
| |
| @Override |
| public void inspectRuntimeShape(RuntimeShapeInspector inspector) |
| { |
| } |
| |
| @Override |
| public boolean isNull() |
| { |
| return value == null; |
| } |
| |
| @Nullable |
| @Override |
| public Object getObject() |
| { |
| return value; |
| } |
| |
| @Override |
| public Class<? extends T> classOfObject() |
| { |
| return clazz; |
| } |
| } |