FilesExpand file tree

 master

/

TypeInfo.java

Copy path

Blame

More file actions

Blame

More file actions

Latest commit

 

History

History

History

166 lines (140 loc) · 4.67 KB

 master

/

TypeInfo.java

Copy path

Top

File metadata and controls

• Code
• Blame

166 lines (140 loc) · 4.67 KB

Raw

Copy raw file

Download raw file

Open symbols panel

Edit and raw actions

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

41

42

43

44

45

46

47

48

49

50

51

52

53

54

55

56

57

58

59

60

61

62

63

64

65

66

67

68

69

70

71

72

73

74

75

76

77

78

79

80

81

82

83

84

85

86

87

88

89

90

91

92

93

94

95

96

97

98

99

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

126

127

128

129

130

131

132

133

134

135

136

137

138

139

140

141

142

143

144

145

146

147

148

149

150

151

152

153

154

155

156

157

158

159

160

161

162

163

164

165

package graphql.schema.idl;

import graphql.Internal;

import graphql.language.AstPrinter;

import graphql.language.ListType;

import graphql.language.NonNullType;

import graphql.language.Type;

import graphql.language.TypeName;

import graphql.schema.GraphQLType;

import java.util.Objects;

import java.util.Stack;

import static graphql.Assert.assertNotNull;

import static graphql.schema.GraphQLList.list;

import static graphql.schema.GraphQLNonNull.nonNull;

/**

* This helper gives you access to the type info given a type definition

*/

@Internal

public class TypeInfo {

public static TypeInfo typeInfo(Type type) {

return new TypeInfo(type);

}

private final Type rawType;

private final TypeName typeName;

private final Stack<Class<?>> decoration = new Stack<>();

private TypeInfo(Type type) {

this.rawType = assertNotNull(type, () -> "type must not be null");

while (!(type instanceof TypeName)) {

if (type instanceof NonNullType) {

decoration.push(NonNullType.class);

type = ((NonNullType) type).getType();

}

if (type instanceof ListType) {

decoration.push(ListType.class);

type = ((ListType) type).getType();

}

}

this.typeName = (TypeName) type;

}

public Type getRawType() {

return rawType;

}

public TypeName getTypeName() {

return typeName;

}

public String getName() {

return typeName.getName();

}

public boolean isList() {

return rawType instanceof ListType;

}

public boolean isNonNull() {

return rawType instanceof NonNullType;

}

public boolean isPlain() {

return !isList() && !isNonNull();

}

/**

* This will rename the type with the specified new name but will preserve the wrapping that was present

*

* @param newName the new name of the type

*

* @return a new type info rebuilt with the new name

*/

public TypeInfo renameAs(String newName) {

Type out = TypeName.newTypeName(newName).build();

Stack<Class<?>> wrappingStack = new Stack<>();

wrappingStack.addAll(this.decoration);

while (!wrappingStack.isEmpty()) {

Class<?> clazz = wrappingStack.pop();

if (clazz.equals(NonNullType.class)) {

out = NonNullType.newNonNullType(out).build();

}

if (clazz.equals(ListType.class)) {

out = ListType.newListType(out).build();

}

}

return typeInfo(out);

}

/**

* This will decorate a graphql type with the original hierarchy of non null and list'ness

* it originally contained in its definition type

*

* @param objectType this should be a graphql type that was originally built from this raw type

* @param <T> the type

*

* @return the decorated type

*/

@SuppressWarnings("TypeParameterUnusedInFormals")

public <T extends GraphQLType> T decorate(GraphQLType objectType) {

GraphQLType out = objectType;

Stack<Class<?>> wrappingStack = new Stack<>();

wrappingStack.addAll(this.decoration);

while (!wrappingStack.isEmpty()) {

Class<?> clazz = wrappingStack.pop();

if (clazz.equals(NonNullType.class)) {

out = nonNull(out);

}

if (clazz.equals(ListType.class)) {

out = list(out);

}

}

// we handle both input and output graphql types

//noinspection unchecked

return (T) out;

}

public static String getAstDesc(Type type) {

return AstPrinter.printAst(type);

}

public TypeInfo unwrapOne() {

if (rawType instanceof NonNullType) {

return typeInfo(((NonNullType) rawType).getType());

}

if (rawType instanceof ListType) {

return typeInfo(((ListType) rawType).getType());

}

return this;

}

public Type unwrapOneType() {

return unwrapOne().getRawType();

}

@Override

public boolean equals(Object o) {

if (this == o) return true;

if (o == null || getClass() != o.getClass()) return false;

TypeInfo typeInfo = (TypeInfo) o;

return isNonNull() == typeInfo.isNonNull() &&

isList() == typeInfo.isList() &&

Objects.equals(typeName.getName(), typeInfo.typeName.getName());

}

@Override

public int hashCode() {

return Objects.hash(typeName.getName(), isNonNull(), isList());

}

@Override

public String toString() {

return "TypeInfo{" +

getAstDesc(rawType) +

'}';

}

}