| /* |
| * 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.calcite.avatica.util; |
| |
| import org.apache.calcite.avatica.ColumnMetaData; |
| import org.apache.calcite.avatica.MetaImpl; |
| import org.apache.calcite.avatica.util.Cursor.Accessor; |
| |
| import org.junit.Test; |
| import org.junit.runner.RunWith; |
| import org.junit.runners.Parameterized; |
| |
| import java.sql.SQLException; |
| import java.sql.Struct; |
| import java.util.ArrayList; |
| import java.util.Arrays; |
| import java.util.Collection; |
| import java.util.Collections; |
| import java.util.List; |
| |
| import static org.junit.Assert.assertArrayEquals; |
| |
| /** |
| * Test class for StructImpl. |
| */ |
| @RunWith(Parameterized.class) |
| public class StructImplTest { |
| |
| /** |
| * A class holding the necessary information for performing tests related with one table column. |
| * |
| * @param <T> the type of the expected values for the column |
| */ |
| private static class ColumnInputBundle<T> { |
| private final ColumnMetaData metaData; |
| |
| /** |
| * The input values for the given column. |
| * |
| * <p>These values are used to construct the rows of a ResultSet. |
| */ |
| private final List<Object> inputValues; |
| |
| /** |
| * The expected values for the given column. |
| * |
| * <p>These values are used to verify that the result obtained from a |
| * ResultSet is correct. Note that inputValues and expectedValues are not |
| * necessarily equal. |
| */ |
| private final List<T> expectedValues; |
| |
| ColumnInputBundle(List<Object> inputValues, List<T> expected, ColumnMetaData metaData) { |
| this.inputValues = inputValues; |
| this.expectedValues = expected; |
| this.metaData = metaData; |
| } |
| |
| @Override public String toString() { |
| return "column=" + metaData.columnName + ", inputType=" + inputValues.get(0).getClass(); |
| } |
| } |
| |
| private final ColumnInputBundle<Struct> columnInputBundle; |
| |
| public StructImplTest(ColumnInputBundle<Struct> columnInputBundle) { |
| this.columnInputBundle = columnInputBundle; |
| } |
| |
| @Parameterized.Parameters(name = "{0}") |
| public static Collection<ColumnInputBundle<Struct>> data() throws SQLException { |
| List<ColumnInputBundle<Struct>> data = new ArrayList<>(); |
| final int numRows = 5; |
| |
| ColumnMetaData oneAttrStructMeta = MetaImpl.columnMetaData( |
| "ONE_ATTRIBUTE_STRUCT", |
| 0, |
| ColumnMetaData.struct( |
| Arrays.asList( |
| MetaImpl.columnMetaData("INT", 0, int.class, false))), |
| false); |
| |
| ColumnMetaData twoAttrStructMeta = MetaImpl.columnMetaData( |
| "TWO_ATTRIBUTES_STRUCT", |
| 0, |
| ColumnMetaData.struct( |
| Arrays.asList( |
| MetaImpl.columnMetaData("INT", 0, int.class, false), |
| MetaImpl.columnMetaData("INT", 1, int.class, false))), |
| false); |
| |
| List<Struct> oneAttrStructData = new ArrayList<>(numRows); |
| List<Struct> twoAttrStructData = new ArrayList<>(numRows); |
| for (int i = 0; i < numRows; i++) { |
| oneAttrStructData.add(new StructImpl(Arrays.asList(i))); |
| twoAttrStructData.add(new StructImpl(Arrays.asList(i, i))); |
| } |
| |
| // A struct has various internal representations. The most common are the following: |
| Class[] structTypes = new Class[]{Object[].class, Struct.class, List.class}; |
| // Generate column bundles for every possible representation that is supported currently. |
| for (Class<?> type : structTypes) { |
| data.add(newStructColBundle(oneAttrStructData, type, oneAttrStructMeta)); |
| data.add(newStructColBundle(twoAttrStructData, type, twoAttrStructMeta)); |
| } |
| |
| return data; |
| } |
| |
| private static ColumnInputBundle newStructColBundle( |
| List<Struct> data, Class<?> structType, ColumnMetaData meta) throws SQLException { |
| List<Object> input = new ArrayList<>(); |
| List<Struct> expected = new ArrayList<>(); |
| for (Struct struct : data) { |
| input.add(structOf(structType, struct)); |
| // The result obtained from StructAccessor is always of type Struct.class |
| expected.add(structOf(Struct.class, struct)); |
| } |
| return new ColumnInputBundle(input, expected, meta); |
| } |
| |
| /** |
| * Creates a struct in the representation dictated by the <code>structClass</code> parameter. |
| */ |
| private static <T> T structOf(Class<T> structClass, Struct structData) throws SQLException { |
| Object[] fieldValues = structData.getAttributes(); |
| if (structClass.equals(Object[].class)) { |
| Object[] arrayStruct = new Object[fieldValues.length]; |
| for (int i = 0; i < fieldValues.length; i++) { |
| arrayStruct[i] = fieldValues[i]; |
| } |
| return (T) arrayStruct; |
| } else if (structClass.equals(Struct.class)) { |
| List<Object> listStruct = new ArrayList<>(); |
| for (int i = 0; i < fieldValues.length; i++) { |
| listStruct.add(fieldValues[i]); |
| } |
| return (T) new StructImpl(listStruct); |
| } else if (structClass.equals(List.class)) { |
| List<Object> listStruct = new ArrayList<>(); |
| for (int i = 0; i < fieldValues.length; i++) { |
| listStruct.add(fieldValues[i]); |
| } |
| return (T) listStruct; |
| } else { |
| throw new IllegalStateException("Cannot create struct of type" + structClass); |
| } |
| } |
| |
| @Test public void testStructAccessor() throws Exception { |
| // Create rows based on the inputValues data |
| List<List<Object>> rows = new ArrayList<>(); |
| for (Object o : columnInputBundle.inputValues) { |
| rows.add(Collections.singletonList(o)); |
| } |
| try (Cursor cursor = new ListIteratorCursor(rows.iterator())) { |
| List<Accessor> accessors = |
| cursor.createAccessors( |
| Collections.singletonList(columnInputBundle.metaData), Unsafe.localCalendar(), null); |
| Accessor accessor = accessors.get(0); |
| int i = 0; |
| while (cursor.next()) { |
| Struct s = accessor.getObject(Struct.class); |
| Object[] expectedStructAttributes = columnInputBundle.expectedValues.get(i).getAttributes(); |
| Object[] actualStructAttributes = s.getAttributes(); |
| assertArrayEquals(expectedStructAttributes, actualStructAttributes); |
| i++; |
| } |
| } |
| } |
| } |
| |
| // End StructImplTest.java |