core/src/test/java/org/apache/carbondata/core/scan/filter/FilterExpressionProcessorTest.java

/*
 * 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
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package org.apache.carbondata.core.scan.filter;

import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.List;
import java.util.UUID;

import org.apache.carbondata.core.metadata.AbsoluteTableIdentifier;
import org.apache.carbondata.core.metadata.CarbonTableIdentifier;
import org.apache.carbondata.core.metadata.datatype.DataTypes;
import org.apache.carbondata.core.metadata.encoder.Encoding;
import org.apache.carbondata.core.metadata.schema.table.column.CarbonColumn;
import org.apache.carbondata.core.metadata.schema.table.column.ColumnSchema;
import org.apache.carbondata.core.scan.expression.ColumnExpression;
import org.apache.carbondata.core.scan.expression.Expression;
import org.apache.carbondata.core.scan.expression.LiteralExpression;
import org.apache.carbondata.core.scan.expression.conditional.InExpression;
import org.apache.carbondata.core.scan.filter.intf.ExpressionType;

import org.junit.Assert;
import org.junit.Before;
import org.junit.Test;

public class FilterExpressionProcessorTest {

  private ColumnSchema columnSchema;

  @Before public void setUp() throws Exception {
    columnSchema = new ColumnSchema();
    columnSchema.setColumnName("IMEI");
    columnSchema.setColumnUniqueId(UUID.randomUUID().toString());
    columnSchema.setDataType(DataTypes.STRING);
    columnSchema.setDimensionColumn(true);
    List<Encoding> encodingList = new ArrayList<>();
    encodingList.add(Encoding.IMPLICIT);
    columnSchema.setEncodingList(encodingList);
  }

  @Test public void testGetFilterResolverBasedOnExpressionType()
      throws NoSuchMethodException, InvocationTargetException, IllegalAccessException {
    CarbonColumn carbonColumn = new CarbonColumn(columnSchema, 0, 0);
    ColumnExpression columnExpression = new ColumnExpression("IMEI", DataTypes.STRING);
    columnExpression.setCarbonColumn(carbonColumn);
    LiteralExpression literalExpression = new LiteralExpression("ImeiValue", DataTypes.STRING);
    InExpression equalToExpression = new InExpression(columnExpression, literalExpression);
    FilterExpressionProcessor filterExpressionProcessor = new FilterExpressionProcessor();
    Method method = FilterExpressionProcessor.class
        .getDeclaredMethod("getFilterResolverBasedOnExpressionType", ExpressionType.class,
            boolean.class, Expression.class, AbsoluteTableIdentifier.class, Expression.class);
    method.setAccessible(true);
    Object result = method
        .invoke(filterExpressionProcessor, ExpressionType.EQUALS, false, equalToExpression, null,
            null);
    Assert.assertTrue(result.getClass().getName()
        .equals("org.apache.carbondata.core.scan.filter.resolver.ConditionalFilterResolverImpl"));
  }
}