org.springframework.core.convert.TypeDescriptor.isCollection()方法的使用及代码示例

x33g5p2x  于2022-01-29 转载在 其他  
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本文整理了Java中org.springframework.core.convert.TypeDescriptor.isCollection()方法的一些代码示例，展示了TypeDescriptor.isCollection()的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。TypeDescriptor.isCollection()方法的具体详情如下：
包路径：org.springframework.core.convert.TypeDescriptor
类名称：TypeDescriptor
方法名：isCollection

TypeDescriptor.isCollection介绍

[英]Is this type a Collection type?
[中]这种类型是集合类型吗？

代码示例

代码示例来源：origin: spring-projects/spring-framework

@Override
@Nullable
public Object convert(@Nullable Object source, TypeDescriptor sourceType, TypeDescriptor targetType) {
  if (source == null) {
    return null;
  }
  TypeDescriptor elementDesc = targetType.getElementTypeDescriptor();
  Collection<Object> target = CollectionFactory.createCollection(targetType.getType(),
      (elementDesc != null ? elementDesc.getType() : null), 1);
  if (elementDesc == null || elementDesc.isCollection()) {
    target.add(source);
  }
  else {
    Object singleElement = this.conversionService.convert(source, sourceType, elementDesc);
    target.add(singleElement);
  }
  return target;
}

代码示例来源：origin: org.springframework/spring-core

@Override
@Nullable
public Object convert(@Nullable Object source, TypeDescriptor sourceType, TypeDescriptor targetType) {
  if (source == null) {
    return null;
  }
  TypeDescriptor elementDesc = targetType.getElementTypeDescriptor();
  Collection<Object> target = CollectionFactory.createCollection(targetType.getType(),
      (elementDesc != null ? elementDesc.getType() : null), 1);
  if (elementDesc == null || elementDesc.isCollection()) {
    target.add(source);
  }
  else {
    Object singleElement = this.conversionService.convert(source, sourceType, elementDesc);
    target.add(singleElement);
  }
  return target;
}

代码示例来源：origin: spring-projects/spring-framework

@Override
public boolean equals(Object other) {
  if (this == other) {
    return true;
  }
  if (!(other instanceof TypeDescriptor)) {
    return false;
  }
  TypeDescriptor otherDesc = (TypeDescriptor) other;
  if (getType() != otherDesc.getType()) {
    return false;
  }
  if (!annotationsMatch(otherDesc)) {
    return false;
  }
  if (isCollection() || isArray()) {
    return ObjectUtils.nullSafeEquals(getElementTypeDescriptor(), otherDesc.getElementTypeDescriptor());
  }
  else if (isMap()) {
    return (ObjectUtils.nullSafeEquals(getMapKeyTypeDescriptor(), otherDesc.getMapKeyTypeDescriptor()) &&
        ObjectUtils.nullSafeEquals(getMapValueTypeDescriptor(), otherDesc.getMapValueTypeDescriptor()));
  }
  else {
    return true;
  }
}

代码示例来源：origin: org.springframework/spring-core

@Override
public boolean equals(Object other) {
  if (this == other) {
    return true;
  }
  if (!(other instanceof TypeDescriptor)) {
    return false;
  }
  TypeDescriptor otherDesc = (TypeDescriptor) other;
  if (getType() != otherDesc.getType()) {
    return false;
  }
  if (!annotationsMatch(otherDesc)) {
    return false;
  }
  if (isCollection() || isArray()) {
    return ObjectUtils.nullSafeEquals(getElementTypeDescriptor(), otherDesc.getElementTypeDescriptor());
  }
  else if (isMap()) {
    return (ObjectUtils.nullSafeEquals(getMapKeyTypeDescriptor(), otherDesc.getMapKeyTypeDescriptor()) &&
        ObjectUtils.nullSafeEquals(getMapValueTypeDescriptor(), otherDesc.getMapValueTypeDescriptor()));
  }
  else {
    return true;
  }
}

代码示例来源：origin: spring-projects/spring-framework

return isNestedAssignable(getElementTypeDescriptor(), typeDescriptor.getElementTypeDescriptor());
else if (isCollection() && typeDescriptor.isCollection()) {
  return isNestedAssignable(getElementTypeDescriptor(), typeDescriptor.getElementTypeDescriptor());

代码示例来源：origin: spring-projects/spring-framework

@Test
public void fieldScalar() throws Exception {
  TypeDescriptor typeDescriptor = new TypeDescriptor(getClass().getField("fieldScalar"));
  assertFalse(typeDescriptor.isPrimitive());
  assertFalse(typeDescriptor.isArray());
  assertFalse(typeDescriptor.isCollection());
  assertFalse(typeDescriptor.isMap());
  assertEquals(Integer.class, typeDescriptor.getType());
  assertEquals(Integer.class, typeDescriptor.getObjectType());
}

代码示例来源：origin: spring-projects/spring-framework

@Test
public void valueOfCollection() throws Exception {
  TypeDescriptor typeDescriptor = TypeDescriptor.valueOf(Collection.class);
  assertTrue(typeDescriptor.isCollection());
  assertFalse(typeDescriptor.isArray());
  assertFalse(typeDescriptor.isMap());
  assertNull(typeDescriptor.getElementTypeDescriptor());
}

代码示例来源：origin: spring-projects/spring-framework

@Test
public void valueOfArray() throws Exception {
  TypeDescriptor typeDescriptor = TypeDescriptor.valueOf(int[].class);
  assertTrue(typeDescriptor.isArray());
  assertFalse(typeDescriptor.isCollection());
  assertFalse(typeDescriptor.isMap());
  assertEquals(Integer.TYPE, typeDescriptor.getElementTypeDescriptor().getType());
}

代码示例来源：origin: spring-projects/spring-framework

@Test
public void parameterPrimitive() throws Exception {
  TypeDescriptor desc = new TypeDescriptor(new MethodParameter(getClass().getMethod("testParameterPrimitive", int.class), 0));
  assertEquals(int.class, desc.getType());
  assertEquals(Integer.class, desc.getObjectType());
  assertEquals("int", desc.getName());
  assertEquals("int", desc.toString());
  assertTrue(desc.isPrimitive());
  assertEquals(0, desc.getAnnotations().length);
  assertFalse(desc.isCollection());
  assertFalse(desc.isMap());
}

代码示例来源：origin: spring-projects/spring-framework

@Test
public void parameterScalar() throws Exception {
  TypeDescriptor desc = new TypeDescriptor(new MethodParameter(getClass().getMethod("testParameterScalar", String.class), 0));
  assertEquals(String.class, desc.getType());
  assertEquals(String.class, desc.getObjectType());
  assertEquals("java.lang.String", desc.getName());
  assertEquals("java.lang.String", desc.toString());
  assertTrue(!desc.isPrimitive());
  assertEquals(0, desc.getAnnotations().length);
  assertFalse(desc.isCollection());
  assertFalse(desc.isArray());
  assertFalse(desc.isMap());
}

代码示例来源：origin: spring-projects/spring-framework

@Test
public void parameterListNoParamTypes() throws Exception {
  MethodParameter methodParameter = new MethodParameter(getClass().getMethod("testParameterListNoParamTypes", List.class), 0);
  TypeDescriptor desc = new TypeDescriptor(methodParameter);
  assertEquals(List.class, desc.getType());
  assertEquals(List.class, desc.getObjectType());
  assertEquals("java.util.List", desc.getName());
  assertEquals("java.util.List<?>", desc.toString());
  assertTrue(!desc.isPrimitive());
  assertEquals(0, desc.getAnnotations().length);
  assertTrue(desc.isCollection());
  assertFalse(desc.isArray());
  assertNull(desc.getElementTypeDescriptor());
  assertFalse(desc.isMap());
}

代码示例来源：origin: spring-projects/spring-framework

@Test
public void valueOfScalar() {
  TypeDescriptor typeDescriptor = TypeDescriptor.valueOf(Integer.class);
  assertFalse(typeDescriptor.isPrimitive());
  assertFalse(typeDescriptor.isArray());
  assertFalse(typeDescriptor.isCollection());
  assertFalse(typeDescriptor.isMap());
  assertEquals(Integer.class, typeDescriptor.getType());
  assertEquals(Integer.class, typeDescriptor.getObjectType());
}

代码示例来源：origin: spring-projects/spring-framework

@Test
public void valueOfPrimitive() {
  TypeDescriptor typeDescriptor = TypeDescriptor.valueOf(int.class);
  assertTrue(typeDescriptor.isPrimitive());
  assertFalse(typeDescriptor.isArray());
  assertFalse(typeDescriptor.isCollection());
  assertFalse(typeDescriptor.isMap());
  assertEquals(Integer.TYPE, typeDescriptor.getType());
  assertEquals(Integer.class, typeDescriptor.getObjectType());
}

代码示例来源：origin: spring-projects/spring-framework

@Test
public void parameterArray() throws Exception {
  MethodParameter methodParameter = new MethodParameter(getClass().getMethod("testParameterArray", Integer[].class), 0);
  TypeDescriptor desc = new TypeDescriptor(methodParameter);
  assertEquals(Integer[].class, desc.getType());
  assertEquals(Integer[].class, desc.getObjectType());
  assertEquals("java.lang.Integer[]", desc.getName());
  assertEquals("java.lang.Integer[]", desc.toString());
  assertTrue(!desc.isPrimitive());
  assertEquals(0, desc.getAnnotations().length);
  assertFalse(desc.isCollection());
  assertTrue(desc.isArray());
  assertEquals(Integer.class, desc.getElementTypeDescriptor().getType());
  assertEquals(TypeDescriptor.valueOf(Integer.class), desc.getElementTypeDescriptor());
  assertFalse(desc.isMap());
}

代码示例来源：origin: spring-projects/spring-framework

@Test
public void parameterMap() throws Exception {
  MethodParameter methodParameter = new MethodParameter(getClass().getMethod("testParameterMap", Map.class), 0);
  TypeDescriptor desc = new TypeDescriptor(methodParameter);
  assertEquals(Map.class, desc.getType());
  assertEquals(Map.class, desc.getObjectType());
  assertEquals("java.util.Map", desc.getName());
  assertEquals("java.util.Map<java.lang.Integer, java.util.List<java.lang.String>>", desc.toString());
  assertTrue(!desc.isPrimitive());
  assertEquals(0, desc.getAnnotations().length);
  assertFalse(desc.isCollection());
  assertFalse(desc.isArray());
  assertTrue(desc.isMap());
  assertEquals(TypeDescriptor.nested(methodParameter, 1), desc.getMapValueTypeDescriptor());
  assertEquals(TypeDescriptor.nested(methodParameter, 2), desc.getMapValueTypeDescriptor().getElementTypeDescriptor());
  assertEquals(Integer.class, desc.getMapKeyTypeDescriptor().getType());
  assertEquals(List.class, desc.getMapValueTypeDescriptor().getType());
  assertEquals(String.class, desc.getMapValueTypeDescriptor().getElementTypeDescriptor().getType());
}

代码示例来源：origin: spring-projects/spring-framework

@Test
public void parameterList() throws Exception {
  MethodParameter methodParameter = new MethodParameter(getClass().getMethod("testParameterList", List.class), 0);
  TypeDescriptor desc = new TypeDescriptor(methodParameter);
  assertEquals(List.class, desc.getType());
  assertEquals(List.class, desc.getObjectType());
  assertEquals("java.util.List", desc.getName());
  assertEquals("java.util.List<java.util.List<java.util.Map<java.lang.Integer, java.lang.Enum<?>>>>", desc.toString());
  assertTrue(!desc.isPrimitive());
  assertEquals(0, desc.getAnnotations().length);
  assertTrue(desc.isCollection());
  assertFalse(desc.isArray());
  assertEquals(List.class, desc.getElementTypeDescriptor().getType());
  assertEquals(TypeDescriptor.nested(methodParameter, 1), desc.getElementTypeDescriptor());
  assertEquals(TypeDescriptor.nested(methodParameter, 2), desc.getElementTypeDescriptor().getElementTypeDescriptor());
  assertEquals(TypeDescriptor.nested(methodParameter, 3), desc.getElementTypeDescriptor().getElementTypeDescriptor().getMapValueTypeDescriptor());
  assertEquals(Integer.class, desc.getElementTypeDescriptor().getElementTypeDescriptor().getMapKeyTypeDescriptor().getType());
  assertEquals(Enum.class, desc.getElementTypeDescriptor().getElementTypeDescriptor().getMapValueTypeDescriptor().getType());
  assertFalse(desc.isMap());
}

代码示例来源：origin: spring-projects/spring-framework

@Test
public void collection() {
  TypeDescriptor desc = TypeDescriptor.collection(List.class, TypeDescriptor.valueOf(Integer.class));
  assertEquals(List.class, desc.getType());
  assertEquals(List.class, desc.getObjectType());
  assertEquals("java.util.List", desc.getName());
  assertEquals("java.util.List<java.lang.Integer>", desc.toString());
  assertTrue(!desc.isPrimitive());
  assertEquals(0, desc.getAnnotations().length);
  assertTrue(desc.isCollection());
  assertFalse(desc.isArray());
  assertEquals(Integer.class, desc.getElementTypeDescriptor().getType());
  assertEquals(TypeDescriptor.valueOf(Integer.class), desc.getElementTypeDescriptor());
  assertFalse(desc.isMap());
}

代码示例来源：origin: spring-projects/spring-framework

@Test
public void map() {
  TypeDescriptor desc = TypeDescriptor.map(Map.class, TypeDescriptor.valueOf(String.class), TypeDescriptor.valueOf(Integer.class));
  assertEquals(Map.class, desc.getType());
  assertEquals(Map.class, desc.getObjectType());
  assertEquals("java.util.Map", desc.getName());
  assertEquals("java.util.Map<java.lang.String, java.lang.Integer>", desc.toString());
  assertTrue(!desc.isPrimitive());
  assertEquals(0, desc.getAnnotations().length);
  assertFalse(desc.isCollection());
  assertFalse(desc.isArray());
  assertTrue(desc.isMap());
  assertEquals(String.class, desc.getMapKeyTypeDescriptor().getType());
  assertEquals(Integer.class, desc.getMapValueTypeDescriptor().getType());
}

代码示例来源：origin: spring-projects/spring-framework

@Test
public void collectionNested() {
  TypeDescriptor desc = TypeDescriptor.collection(List.class, TypeDescriptor.collection(List.class, TypeDescriptor.valueOf(Integer.class)));
  assertEquals(List.class, desc.getType());
  assertEquals(List.class, desc.getObjectType());
  assertEquals("java.util.List", desc.getName());
  assertEquals("java.util.List<java.util.List<java.lang.Integer>>", desc.toString());
  assertTrue(!desc.isPrimitive());
  assertEquals(0, desc.getAnnotations().length);
  assertTrue(desc.isCollection());
  assertFalse(desc.isArray());
  assertEquals(List.class, desc.getElementTypeDescriptor().getType());
  assertEquals(TypeDescriptor.valueOf(Integer.class), desc.getElementTypeDescriptor().getElementTypeDescriptor());
  assertFalse(desc.isMap());
}

代码示例来源：origin: spring-projects/spring-framework

@Test
public void mapNested() {
  TypeDescriptor desc = TypeDescriptor.map(Map.class, TypeDescriptor.valueOf(String.class),
      TypeDescriptor.map(Map.class, TypeDescriptor.valueOf(String.class), TypeDescriptor.valueOf(Integer.class)));
  assertEquals(Map.class, desc.getType());
  assertEquals(Map.class, desc.getObjectType());
  assertEquals("java.util.Map", desc.getName());
  assertEquals("java.util.Map<java.lang.String, java.util.Map<java.lang.String, java.lang.Integer>>", desc.toString());
  assertTrue(!desc.isPrimitive());
  assertEquals(0, desc.getAnnotations().length);
  assertFalse(desc.isCollection());
  assertFalse(desc.isArray());
  assertTrue(desc.isMap());
  assertEquals(String.class, desc.getMapKeyTypeDescriptor().getType());
  assertEquals(String.class, desc.getMapValueTypeDescriptor().getMapKeyTypeDescriptor().getType());
  assertEquals(Integer.class, desc.getMapValueTypeDescriptor().getMapValueTypeDescriptor().getType());
}

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