/*
* Copyright 2002-2014 the original author or authors.
*
* 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 org.springframework.core.convert.support;
import static org.hamcrest.CoreMatchers.*;
import static org.hamcrest.MatcherAssert.*;
import java.math.BigDecimal;
import java.math.BigInteger;
import java.util.AbstractList;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.LinkedHashMap;
import java.util.LinkedHashSet;
import java.util.LinkedList;
import java.util.List;
import java.util.Locale;
import java.util.Map;
import java.util.Properties;
import java.util.Set;
import junit.framework.TestCase;
import org.springframework.android.test.Assert;
import org.springframework.core.convert.ConversionFailedException;
import org.springframework.core.convert.ConverterNotFoundException;
import org.springframework.core.convert.TypeDescriptor;
import org.springframework.core.convert.converter.Converter;
import android.graphics.Color;
/**
* @author Keith Donald
* @author Juergen Hoeller
*/
public class DefaultConversionTests extends TestCase {
private final DefaultConversionService conversionService = new DefaultConversionService();
public void testStringToCharacter() {
assertEquals(Character.valueOf('1'), conversionService.convert("1", Character.class));
}
public void testStringToCharacterEmptyString() {
assertEquals(null, conversionService.convert("", Character.class));
}
public void testStringToCharacterInvalidString() {
try {
conversionService.convert("invalid", Character.class);
fail("expected ConversionFailedException");
}
catch (ConversionFailedException e) {
}
}
public void testCharacterToString() {
assertEquals("3", conversionService.convert('3', String.class));
}
public void testStringToBooleanTrue() {
assertEquals(Boolean.valueOf(true), conversionService.convert("true", Boolean.class));
assertEquals(Boolean.valueOf(true), conversionService.convert("on", Boolean.class));
assertEquals(Boolean.valueOf(true), conversionService.convert("yes", Boolean.class));
assertEquals(Boolean.valueOf(true), conversionService.convert("1", Boolean.class));
assertEquals(Boolean.valueOf(true), conversionService.convert("TRUE", Boolean.class));
assertEquals(Boolean.valueOf(true), conversionService.convert("ON", Boolean.class));
assertEquals(Boolean.valueOf(true), conversionService.convert("YES", Boolean.class));
}
public void testStringToBooleanFalse() {
assertEquals(Boolean.valueOf(false), conversionService.convert("false", Boolean.class));
assertEquals(Boolean.valueOf(false), conversionService.convert("off", Boolean.class));
assertEquals(Boolean.valueOf(false), conversionService.convert("no", Boolean.class));
assertEquals(Boolean.valueOf(false), conversionService.convert("0", Boolean.class));
assertEquals(Boolean.valueOf(false), conversionService.convert("FALSE", Boolean.class));
assertEquals(Boolean.valueOf(false), conversionService.convert("OFF", Boolean.class));
assertEquals(Boolean.valueOf(false), conversionService.convert("NO", Boolean.class));
}
public void testStringToBooleanEmptyString() {
assertEquals(null, conversionService.convert("", Boolean.class));
}
public void testStringToBooleanInvalidString() {
try {
conversionService.convert("invalid", Boolean.class);
fail("expected ConversionFailedException");
}
catch (ConversionFailedException e) {
}
}
public void testBooleanToString() {
assertEquals("true", conversionService.convert(true, String.class));
}
public void testStringToByte() throws Exception {
assertEquals(Byte.valueOf("1"), conversionService.convert("1", Byte.class));
}
public void testByteToString() {
assertEquals("65", conversionService.convert(new String("A").getBytes()[0], String.class));
}
public void testStringToShort() {
assertEquals(Short.valueOf("1"), conversionService.convert("1", Short.class));
}
public void testShortToString() {
short three = 3;
assertEquals("3", conversionService.convert(three, String.class));
}
public void testStringToInteger() {
assertEquals(Integer.valueOf("1"), conversionService.convert("1", Integer.class));
}
public void testIntegerToString() {
assertEquals("3", conversionService.convert(3, String.class));
}
public void testStringToLong() {
assertEquals(Long.valueOf("1"), conversionService.convert("1", Long.class));
}
public void testLongToString() {
assertEquals("3", conversionService.convert(3L, String.class));
}
public void testStringToFloat() {
assertEquals(Float.valueOf("1.0"), conversionService.convert("1.0", Float.class));
}
public void testFloatToString() {
assertEquals("1.0", conversionService.convert(new Float("1.0"), String.class));
}
public void testStringToDouble() {
assertEquals(Double.valueOf("1.0"), conversionService.convert("1.0", Double.class));
}
public void testDoubleToString() {
assertEquals("1.0", conversionService.convert(new Double("1.0"), String.class));
}
public void testStringToBigInteger() {
assertEquals(new BigInteger("1"), conversionService.convert("1", BigInteger.class));
}
public void testBigIntegerToString() {
assertEquals("100", conversionService.convert(new BigInteger("100"), String.class));
}
public void testStringToBigDecimal() {
assertEquals(new BigDecimal("1.0"), conversionService.convert("1.0", BigDecimal.class));
}
public void testBigDecimalToString() {
assertEquals("100.00", conversionService.convert(new BigDecimal("100.00"), String.class));
}
public void testStringToNumber() {
assertEquals(new BigDecimal("1.0"), conversionService.convert("1.0", Number.class));
}
public void testStringToNumberEmptyString() {
assertEquals(null, conversionService.convert("", Number.class));
}
public void testStringToEnum() throws Exception {
assertEquals(Foo.BAR, conversionService.convert("BAR", Foo.class));
}
public void testStringToEnumWithSubclass() throws Exception {
assertEquals(SubFoo.BAZ, conversionService.convert("BAZ", SubFoo.BAR.getClass()));
}
public void testStringToEnumEmptyString() {
assertEquals(null, conversionService.convert("", Foo.class));
}
public void testEnumToString() {
assertEquals("BAR", conversionService.convert(Foo.BAR, String.class));
}
public static enum Foo {
BAR, BAZ
}
public static enum SubFoo {
BAR {
@Override
String s() {
return "x";
}
},
BAZ {
@Override
String s() {
return "y";
}
};
abstract String s();
}
public void testStringToLocale() {
assertEquals(Locale.ENGLISH, conversionService.convert("en", Locale.class));
}
public void testStringToString() {
String str = "test";
assertSame(str, conversionService.convert(str, String.class));
}
public void testNumberToNumber() {
assertEquals(Long.valueOf(1), conversionService.convert(Integer.valueOf(1), Long.class));
}
public void testNumberToNumberNotSupportedNumber() {
try {
conversionService.convert(Integer.valueOf(1), CustomNumber.class);
fail("expected ConversionFailedException");
}
catch(ConversionFailedException e) {
}
}
@SuppressWarnings("serial")
public static class CustomNumber extends Number {
@Override
public double doubleValue() {
return 0;
}
@Override
public float floatValue() {
return 0;
}
@Override
public int intValue() {
return 0;
}
@Override
public long longValue() {
return 0;
}
}
public void testNumberToCharacter() {
assertEquals(Character.valueOf('A'), conversionService.convert(Integer.valueOf(65), Character.class));
}
public void testCharacterToNumber() {
assertEquals(new Integer(65), conversionService.convert('A', Integer.class));
}
// collection conversion
public void testConvertArrayToCollectionInterface() {
List<?> result = conversionService.convert(new String[] { "1", "2", "3" }, List.class);
assertEquals("1", result.get(0));
assertEquals("2", result.get(1));
assertEquals("3", result.get(2));
}
public List<Integer> genericList = new ArrayList<Integer>();
public void testConvertArrayToCollectionGenericTypeConversion() throws Exception {
List<Integer> result = (List<Integer>) conversionService.convert(new String[] { "1", "2", "3" }, TypeDescriptor
.valueOf(String[].class), new TypeDescriptor(getClass().getDeclaredField("genericList")));
assertEquals(new Integer("1"), result.get(0));
assertEquals(new Integer("2"), result.get(1));
assertEquals(new Integer("3"), result.get(2));
}
// public void testSpr7766() throws Exception {
// ConverterRegistry registry = (conversionService);
// registry.addConverter(new ColorConverter());
// List<Color> colors = (List<Color>) conversionService.convert(new String[] { "ffffff", "#000000" }, TypeDescriptor.valueOf(String[].class), new TypeDescriptor(new MethodParameter(getClass().getMethod("handlerMethod", List.class), 0)));
// assertEquals(2, colors.size());
// assertEquals(Color.WHITE, colors.get(0));
// assertEquals(Color.BLACK, colors.get(1));
// }
// public class ColorConverter implements Converter<String, Color> {
// @Override
// public Color convert(String source) { if (!source.startsWith("#")) source = "#" + source; return Color.parseColor(source); }
// }
public void handlerMethod(List<Color> color) {
}
public void testConvertArrayToCollectionImpl() {
LinkedList<?> result = conversionService.convert(new String[] { "1", "2", "3" }, LinkedList.class);
assertEquals("1", result.get(0));
assertEquals("2", result.get(1));
assertEquals("3", result.get(2));
}
public void testConvertArrayToAbstractCollection() {
try {
conversionService.convert(new String[] { "1", "2", "3" }, AbstractList.class);
fail("expected ConversionFailedException");
}
catch (ConversionFailedException e) {
}
}
public static enum FooEnum {
BAR, BAZ
}
public void testConvertArrayToString() {
String result = conversionService.convert(new String[] { "1", "2", "3" }, String.class);
assertEquals("1,2,3", result);
}
public void testConvertArrayToStringWithElementConversion() {
String result = conversionService.convert(new Integer[] { 1, 2, 3 }, String.class);
assertEquals("1,2,3", result);
}
public void testConvertEmptyArrayToString() {
String result = conversionService.convert(new String[0], String.class);
assertEquals("", result);
}
public void testConvertStringToArray() {
String[] result = conversionService.convert("1,2,3", String[].class);
assertEquals(3, result.length);
assertEquals("1", result[0]);
assertEquals("2", result[1]);
assertEquals("3", result[2]);
}
public void testConvertStringToArrayWithElementConversion() {
Integer[] result = conversionService.convert("1,2,3", Integer[].class);
assertEquals(3, result.length);
assertEquals(new Integer(1), result[0]);
assertEquals(new Integer(2), result[1]);
assertEquals(new Integer(3), result[2]);
}
public void testConvertStringToPrimitiveArrayWithElementConversion() {
int[] result = conversionService.convert("1,2,3", int[].class);
assertEquals(3, result.length);
assertEquals(1, result[0]);
assertEquals(2, result[1]);
assertEquals(3, result[2]);
}
public void testConvertEmptyStringToArray() {
String[] result = conversionService.convert("", String[].class);
assertEquals(0, result.length);
}
public void testConvertArrayToObject() {
Object[] array = new Object[] { 3L };
Object result = conversionService.convert(array, Long.class);
assertEquals(3L, result);
}
public void testConvertArrayToObjectWithElementConversion() {
String[] array = new String[] { "3" };
Integer result = conversionService.convert(array, Integer.class);
assertEquals(new Integer(3), result);
}
public void testConvertArrayToObjectAssignableTargetType() {
Long[] array = new Long[] { 3L };
Long[] result = (Long[]) conversionService.convert(array, Object.class);
Assert.assertArrayEquals(array, result);
}
public void testConvertObjectToArray() {
Object[] result = conversionService.convert(3L, Object[].class);
assertEquals(1, result.length);
assertEquals(3L, result[0]);
}
public void testConvertObjectToArrayWithElementConversion() {
Integer[] result = conversionService.convert(3L, Integer[].class);
assertEquals(1, result.length);
assertEquals(new Integer(3), result[0]);
}
public void testConvertCollectionToArray() {
List<String> list = new ArrayList<String>();
list.add("1");
list.add("2");
list.add("3");
String[] result = conversionService.convert(list, String[].class);
assertEquals("1", result[0]);
assertEquals("2", result[1]);
assertEquals("3", result[2]);
}
public void testConvertCollectionToArrayWithElementConversion() {
List<String> list = new ArrayList<String>();
list.add("1");
list.add("2");
list.add("3");
Integer[] result = conversionService.convert(list, Integer[].class);
assertEquals(new Integer(1), result[0]);
assertEquals(new Integer(2), result[1]);
assertEquals(new Integer(3), result[2]);
}
public void testConvertCollectionToString() {
List<String> list = Arrays.asList(new String[] { "foo", "bar" });
String result = conversionService.convert(list, String.class);
assertEquals("foo,bar", result);
}
public void testConvertCollectionToStringWithElementConversion() throws Exception {
List<Integer> list = Arrays.asList(new Integer[] { 3, 5 });
String result = (String) conversionService.convert(list,
new TypeDescriptor(getClass().getField("genericList")), TypeDescriptor.valueOf(String.class));
assertEquals("3,5", result);
}
public void testConvertStringToCollection() {
List result = conversionService.convert("1,2,3", List.class);
assertEquals(3, result.size());
assertEquals("1", result.get(0));
assertEquals("2", result.get(1));
assertEquals("3", result.get(2));
}
public void testConvertStringToCollectionWithElementConversion() throws Exception {
List result = (List) conversionService.convert("1,2,3", TypeDescriptor.valueOf(String.class),
new TypeDescriptor(getClass().getField("genericList")));
assertEquals(3, result.size());
assertEquals(new Integer(1), result.get(0));
assertEquals(new Integer(2), result.get(1));
assertEquals(new Integer(3), result.get(2));
}
public void testConvertEmptyStringToCollection() {
Collection result = conversionService.convert("", Collection.class);
assertEquals(0, result.size());
}
public void testConvertCollectionToObject() {
List<Long> list = Collections.singletonList(3L);
Long result = conversionService.convert(list, Long.class);
assertEquals(new Long(3), result);
}
public void testConvertCollectionToObjectWithElementConversion() {
List<String> list = Collections.singletonList("3");
Integer result = conversionService.convert(list, Integer.class);
assertEquals(new Integer(3), result);
}
public void testConvertCollectionToObjectAssignableTarget() throws Exception {
Collection<String> source = new ArrayList<String>();
source.add("foo");
Object result = conversionService.convert(source, new TypeDescriptor(getClass().getField("assignableTarget")));
assertEquals(source, result);
}
public void testConvertCollectionToObjectWithCustomConverter() throws Exception {
List<String> source = new ArrayList<String>();
source.add("A");
source.add("B");
conversionService.addConverter(new Converter<List, ListWrapper>() {
@Override
public ListWrapper convert(List source) {
return new ListWrapper(source);
}
});
ListWrapper result = conversionService.convert(source, ListWrapper.class);
assertSame(source, result.getList());
}
public void testConvertObjectToCollection() {
List<String> result = (List<String>) conversionService.convert(3L, List.class);
assertEquals(1, result.size());
assertEquals(3L, result.get(0));
}
public void testConvertObjectToCollectionWithElementConversion() throws Exception {
List<Integer> result = (List<Integer>) conversionService.convert(3L, TypeDescriptor.valueOf(Long.class),
new TypeDescriptor(getClass().getField("genericList")));
assertEquals(1, result.size());
assertEquals(new Integer(3), result.get(0));
}
public void testConvertArrayToArray() {
Integer[] result = conversionService.convert(new String[] { "1", "2", "3" }, Integer[].class);
assertEquals(new Integer(1), result[0]);
assertEquals(new Integer(2), result[1]);
assertEquals(new Integer(3), result[2]);
}
public void testConvertArrayToPrimitiveArray() {
int[] result = conversionService.convert(new String[] { "1", "2", "3" }, int[].class);
assertEquals(1, result[0]);
assertEquals(2, result[1]);
assertEquals(3, result[2]);
}
public void testConvertArrayToArrayAssignable() {
int[] result = conversionService.convert(new int[] { 1, 2, 3 }, int[].class);
assertEquals(1, result[0]);
assertEquals(2, result[1]);
assertEquals(3, result[2]);
}
public void testConvertCollectionToCollection() throws Exception {
Set<String> foo = new LinkedHashSet<String>();
foo.add("1");
foo.add("2");
foo.add("3");
List<Integer> bar = (List<Integer>) conversionService.convert(foo, TypeDescriptor.forObject(foo),
new TypeDescriptor(getClass().getField("genericList")));
assertEquals(new Integer(1), bar.get(0));
assertEquals(new Integer(2), bar.get(1));
assertEquals(new Integer(3), bar.get(2));
}
public void testConvertCollectionToCollectionNull() throws Exception {
List<Integer> bar = (List<Integer>) conversionService.convert(null,
TypeDescriptor.valueOf(LinkedHashSet.class), new TypeDescriptor(getClass().getField("genericList")));
assertNull(bar);
}
public void testConvertCollectionToCollectionNotGeneric() throws Exception {
Set<String> foo = new LinkedHashSet<String>();
foo.add("1");
foo.add("2");
foo.add("3");
List bar = (List) conversionService.convert(foo, TypeDescriptor.valueOf(LinkedHashSet.class), TypeDescriptor
.valueOf(List.class));
assertEquals("1", bar.get(0));
assertEquals("2", bar.get(1));
assertEquals("3", bar.get(2));
}
public void testConvertCollectionToCollectionSpecialCaseSourceImpl() throws Exception {
Map map = new LinkedHashMap();
map.put("1", "1");
map.put("2", "2");
map.put("3", "3");
Collection values = map.values();
List<Integer> bar = (List<Integer>) conversionService.convert(values,
TypeDescriptor.forObject(values), new TypeDescriptor(getClass().getField("genericList")));
assertEquals(3, bar.size());
assertEquals(new Integer(1), bar.get(0));
assertEquals(new Integer(2), bar.get(1));
assertEquals(new Integer(3), bar.get(2));
}
public void testCollection() {
List<String> strings = new ArrayList<String>();
strings.add("3");
strings.add("9");
List<Integer> integers = (List<Integer>) conversionService.convert(strings, TypeDescriptor.collection(List.class, TypeDescriptor.valueOf(Integer.class)));
assertEquals(new Integer(3), integers.get(0));
assertEquals(new Integer(9), integers.get(1));
}
public Map<Integer, FooEnum> genericMap = new HashMap<Integer, FooEnum>();
public void testConvertMapToMap() throws Exception {
Map<String, String> foo = new HashMap<String, String>();
foo.put("1", "BAR");
foo.put("2", "BAZ");
Map<String, FooEnum> map = (Map<String, FooEnum>) conversionService.convert(foo,
TypeDescriptor.forObject(foo), new TypeDescriptor(getClass().getField("genericMap")));
assertEquals(FooEnum.BAR, map.get(1));
assertEquals(FooEnum.BAZ, map.get(2));
}
public void testMap() {
Map<String, String> strings = new HashMap<String, String>();
strings.put("3", "9");
strings.put("6", "31");
Map<Integer, Integer> integers = (Map<Integer, Integer>) conversionService.convert(strings, TypeDescriptor.map(Map.class, TypeDescriptor.valueOf(Integer.class), TypeDescriptor.valueOf(Integer.class)));
assertEquals(new Integer(9), integers.get(3));
assertEquals(new Integer(31), integers.get(6));
}
public void testConvertPropertiesToString() {
Properties foo = new Properties();
foo.setProperty("1", "BAR");
foo.setProperty("2", "BAZ");
String result = conversionService.convert(foo, String.class);
assertTrue(result.contains("1=BAR"));
assertTrue(result.contains("2=BAZ"));
}
public void testConvertStringToProperties() {
Properties result = conversionService.convert("a=b\nc=2\nd=", Properties.class);
assertEquals(3, result.size());
assertEquals("b", result.getProperty("a"));
assertEquals("2", result.getProperty("c"));
assertEquals("", result.getProperty("d"));
}
public void testConvertStringToPropertiesWithSpaces() {
Properties result = conversionService.convert(" foo=bar\n bar=baz\n baz=boop", Properties.class);
assertEquals("bar", result.get("foo"));
assertEquals("baz", result.get("bar"));
assertEquals("boop", result.get("baz"));
}
// generic object conversion
public void testConvertObjectToStringValueOfMethodPresent() {
assertEquals("123456789", conversionService.convert(ISBN.valueOf("123456789"), String.class));
}
public void testConvertObjectToStringStringConstructorPresent() {
assertEquals("123456789", conversionService.convert(new SSN("123456789"), String.class));
}
public void testConvertObjectToStringNotSupported() {
assertFalse(conversionService.canConvert(TestEntity.class, String.class));
}
public void testConvertObjectToObjectValueOfMethod() {
assertEquals(ISBN.valueOf("123456789"), conversionService.convert("123456789", ISBN.class));
}
public void testConvertObjectToObjectConstructor() {
assertEquals(new SSN("123456789"), conversionService.convert("123456789", SSN.class));
assertEquals("123456789", conversionService.convert(new SSN("123456789"), String.class));
}
public void testConvertObjectToObjectNoValueOFMethodOrConstructor() {
try {
conversionService.convert(new Long(3), SSN.class);
fail("expected ConverterNotFoundException");
}
catch(ConverterNotFoundException e) {
}
}
public void testConvertObjectToObjectFinderMethod() {
TestEntity e = conversionService.convert(1L, TestEntity.class);
assertEquals(new Long(1), e.getId());
}
public void testConvertObjectToObjectFinderMethodWithNull() {
TestEntity e = (TestEntity) conversionService.convert(null, TypeDescriptor.valueOf(String.class), TypeDescriptor.valueOf(TestEntity.class));
assertNull(e);
}
public void testConvertObjectToObjectFinderMethodWithIdConversion() {
TestEntity e = conversionService.convert("1", TestEntity.class);
assertEquals(new Long(1), e.getId());
}
public void testConvertCharArrayToString() throws Exception {
String converted = conversionService.convert(new char[] { 'a', 'b', 'c' }, String.class);
assertThat(converted, equalTo("a,b,c"));
}
public void testConvertStringToCharArray() throws Exception {
char[] converted = conversionService.convert("a,b,c", char[].class);
assertThat(converted, equalTo(new char[] { 'a', 'b', 'c' }));
}
public void testConvertStringToCustomCharArray() throws Exception {
conversionService.addConverter(new Converter<String, char[]>() {
@Override
public char[] convert(String source) {
return source.toCharArray();
}
});
char[] converted = conversionService.convert("abc", char[].class);
assertThat(converted, equalTo(new char[] { 'a', 'b', 'c' }));
}
public void testMultidimensionalArrayToListConversionShouldConvertEntriesCorrectly() {
String[][] grid = new String[][] { new String[] { "1", "2", "3", "4" }, new String[] { "5", "6", "7", "8" },
new String[] { "9", "10", "11", "12" } };
List<String[]> converted = conversionService.convert(grid, List.class);
String[][] convertedBack = conversionService.convert(converted, String[][].class);
Assert.assertArrayEquals(grid, convertedBack);
}
public static class TestEntity {
private Long id;
public TestEntity(Long id) {
this.id = id;
}
public Long getId() {
return id;
}
public static TestEntity findTestEntity(Long id) {
return new TestEntity(id);
}
}
private static class ListWrapper {
private List<?> list;
public ListWrapper(List<?> list) {
this.list = list;
}
public List<?> getList() {
return list;
}
}
public Object assignableTarget;
private static class SSN {
private String value;
public SSN(String value) {
this.value = value;
}
@Override
public boolean equals(Object o) {
if (!(o instanceof SSN)) {
return false;
}
SSN ssn = (SSN) o;
return this.value.equals(ssn.value);
}
@Override
public int hashCode() {
return value.hashCode();
}
@Override
public String toString() {
return value;
}
}
private static class ISBN {
private String value;
private ISBN(String value) {
this.value = value;
}
@Override
public boolean equals(Object o) {
if (!(o instanceof ISBN)) {
return false;
}
ISBN isbn = (ISBN) o;
return this.value.equals(isbn.value);
}
@Override
public int hashCode() {
return value.hashCode();
}
@Override
public String toString() {
return value;
}
public static ISBN valueOf(String value) {
return new ISBN(value);
}
}
}