-
Notifications
You must be signed in to change notification settings - Fork 1.1k
/
NodeVisitorWithTypeTracking.java
265 lines (218 loc) · 12.8 KB
/
NodeVisitorWithTypeTracking.java
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
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
package graphql.analysis;
import graphql.GraphQLContext;
import graphql.Internal;
import graphql.execution.CoercedVariables;
import graphql.execution.ValuesResolver;
import graphql.execution.conditional.ConditionalNodes;
import graphql.introspection.Introspection;
import graphql.language.Argument;
import graphql.language.Directive;
import graphql.language.Field;
import graphql.language.FragmentDefinition;
import graphql.language.FragmentSpread;
import graphql.language.InlineFragment;
import graphql.language.Node;
import graphql.language.NodeVisitorStub;
import graphql.language.ObjectField;
import graphql.language.TypeName;
import graphql.language.Value;
import graphql.language.VariableDefinition;
import graphql.schema.GraphQLArgument;
import graphql.schema.GraphQLCodeRegistry;
import graphql.schema.GraphQLCompositeType;
import graphql.schema.GraphQLFieldDefinition;
import graphql.schema.GraphQLFieldsContainer;
import graphql.schema.GraphQLInputObjectField;
import graphql.schema.GraphQLInputObjectType;
import graphql.schema.GraphQLSchema;
import graphql.schema.GraphQLUnmodifiedType;
import graphql.util.TraversalControl;
import graphql.util.TraverserContext;
import java.util.Locale;
import java.util.Map;
import static graphql.Assert.assertNotNull;
import static graphql.schema.GraphQLTypeUtil.unwrapAll;
import static graphql.util.TraverserContext.Phase.LEAVE;
/**
* Internally used node visitor which delegates to a {@link QueryVisitor} with type
* information about the visited field.
*/
@Internal
public class NodeVisitorWithTypeTracking extends NodeVisitorStub {
private final QueryVisitor preOrderCallback;
private final QueryVisitor postOrderCallback;
private final Map<String, Object> variables;
private final GraphQLSchema schema;
private final Map<String, FragmentDefinition> fragmentsByName;
private final ConditionalNodes conditionalNodes = new ConditionalNodes();
public NodeVisitorWithTypeTracking(QueryVisitor preOrderCallback, QueryVisitor postOrderCallback, Map<String, Object> variables, GraphQLSchema schema, Map<String, FragmentDefinition> fragmentsByName) {
this.preOrderCallback = preOrderCallback;
this.postOrderCallback = postOrderCallback;
this.variables = variables;
this.schema = schema;
this.fragmentsByName = fragmentsByName;
}
@Override
public TraversalControl visitDirective(Directive node, TraverserContext<Node> context) {
// to avoid visiting arguments for directives we abort the traversal here
return TraversalControl.ABORT;
}
@Override
public TraversalControl visitInlineFragment(InlineFragment inlineFragment, TraverserContext<Node> context) {
QueryTraversalContext parentEnv = context.getVarFromParents(QueryTraversalContext.class);
GraphQLContext graphQLContext = parentEnv.getGraphQLContext();
if (!conditionalNodes.shouldInclude(inlineFragment, variables, null, graphQLContext)) {
return TraversalControl.ABORT;
}
QueryVisitorInlineFragmentEnvironment inlineFragmentEnvironment = new QueryVisitorInlineFragmentEnvironmentImpl(inlineFragment, context, schema);
if (context.getPhase() == LEAVE) {
postOrderCallback.visitInlineFragment(inlineFragmentEnvironment);
return TraversalControl.CONTINUE;
}
preOrderCallback.visitInlineFragment(inlineFragmentEnvironment);
// inline fragments are allowed not have type conditions, if so the parent type counts
GraphQLCompositeType fragmentCondition;
if (inlineFragment.getTypeCondition() != null) {
TypeName typeCondition = inlineFragment.getTypeCondition();
fragmentCondition = (GraphQLCompositeType) schema.getType(typeCondition.getName());
} else {
fragmentCondition = parentEnv.getUnwrappedOutputType();
}
// for unions we only have other fragments inside
context.setVar(QueryTraversalContext.class, new QueryTraversalContext(fragmentCondition, parentEnv.getEnvironment(), inlineFragment, graphQLContext));
return TraversalControl.CONTINUE;
}
@Override
public TraversalControl visitFragmentDefinition(FragmentDefinition fragmentDefinition, TraverserContext<Node> context) {
QueryTraversalContext parentEnv = context.getVarFromParents(QueryTraversalContext.class);
GraphQLContext graphQLContext = parentEnv.getGraphQLContext();
if (!conditionalNodes.shouldInclude(fragmentDefinition, variables, null, graphQLContext)) {
return TraversalControl.ABORT;
}
QueryVisitorFragmentDefinitionEnvironment fragmentEnvironment = new QueryVisitorFragmentDefinitionEnvironmentImpl(fragmentDefinition, context, schema);
if (context.getPhase() == LEAVE) {
postOrderCallback.visitFragmentDefinition(fragmentEnvironment);
return TraversalControl.CONTINUE;
}
preOrderCallback.visitFragmentDefinition(fragmentEnvironment);
GraphQLCompositeType typeCondition = (GraphQLCompositeType) schema.getType(fragmentDefinition.getTypeCondition().getName());
context.setVar(QueryTraversalContext.class, new QueryTraversalContext(typeCondition, parentEnv.getEnvironment(), fragmentDefinition, graphQLContext));
return TraversalControl.CONTINUE;
}
@Override
public TraversalControl visitFragmentSpread(FragmentSpread fragmentSpread, TraverserContext<Node> context) {
QueryTraversalContext parentEnv = context.getVarFromParents(QueryTraversalContext.class);
GraphQLContext graphQLContext = parentEnv.getGraphQLContext();
if (!conditionalNodes.shouldInclude(fragmentSpread, variables, null, graphQLContext)) {
return TraversalControl.ABORT;
}
FragmentDefinition fragmentDefinition = fragmentsByName.get(fragmentSpread.getName());
if (!conditionalNodes.shouldInclude(fragmentDefinition, variables, null, graphQLContext)) {
return TraversalControl.ABORT;
}
QueryVisitorFragmentSpreadEnvironment fragmentSpreadEnvironment = new QueryVisitorFragmentSpreadEnvironmentImpl(fragmentSpread, fragmentDefinition, context, schema);
if (context.getPhase() == LEAVE) {
postOrderCallback.visitFragmentSpread(fragmentSpreadEnvironment);
return TraversalControl.CONTINUE;
}
preOrderCallback.visitFragmentSpread(fragmentSpreadEnvironment);
GraphQLCompositeType typeCondition = (GraphQLCompositeType) schema.getType(fragmentDefinition.getTypeCondition().getName());
assertNotNull(typeCondition,
"Invalid type condition '%s' in fragment '%s'", fragmentDefinition.getTypeCondition().getName(),
fragmentDefinition.getName());
context.setVar(QueryTraversalContext.class, new QueryTraversalContext(typeCondition, parentEnv.getEnvironment(), fragmentDefinition, graphQLContext));
return TraversalControl.CONTINUE;
}
@Override
public TraversalControl visitField(Field field, TraverserContext<Node> context) {
QueryTraversalContext parentEnv = context.getVarFromParents(QueryTraversalContext.class);
GraphQLContext graphQLContext = parentEnv.getGraphQLContext();
GraphQLFieldDefinition fieldDefinition = Introspection.getFieldDef(schema, (GraphQLCompositeType) unwrapAll(parentEnv.getOutputType()), field.getName());
boolean isTypeNameIntrospectionField = fieldDefinition == schema.getIntrospectionTypenameFieldDefinition();
GraphQLFieldsContainer fieldsContainer = !isTypeNameIntrospectionField ? (GraphQLFieldsContainer) unwrapAll(parentEnv.getOutputType()) : null;
GraphQLCodeRegistry codeRegistry = schema.getCodeRegistry();
Map<String, Object> argumentValues = ValuesResolver.getArgumentValues(codeRegistry,
fieldDefinition.getArguments(),
field.getArguments(),
CoercedVariables.of(variables),
GraphQLContext.getDefault(),
Locale.getDefault());
QueryVisitorFieldEnvironment environment = new QueryVisitorFieldEnvironmentImpl(isTypeNameIntrospectionField,
field,
fieldDefinition,
parentEnv.getOutputType(),
fieldsContainer,
parentEnv.getEnvironment(),
argumentValues,
parentEnv.getSelectionSetContainer(),
context, schema);
if (context.getPhase() == LEAVE) {
postOrderCallback.visitField(environment);
return TraversalControl.CONTINUE;
}
if (!conditionalNodes.shouldInclude(field, variables, null, graphQLContext)) {
return TraversalControl.ABORT;
}
TraversalControl traversalControl = preOrderCallback.visitFieldWithControl(environment);
GraphQLUnmodifiedType unmodifiedType = unwrapAll(fieldDefinition.getType());
QueryTraversalContext fieldEnv = (unmodifiedType instanceof GraphQLCompositeType)
? new QueryTraversalContext(fieldDefinition.getType(), environment, field, graphQLContext)
: new QueryTraversalContext(null, environment, field, graphQLContext);// Terminal (scalar) node, EMPTY FRAME
context.setVar(QueryTraversalContext.class, fieldEnv);
return traversalControl;
}
@Override
public TraversalControl visitArgument(Argument argument, TraverserContext<Node> context) {
QueryTraversalContext fieldCtx = context.getVarFromParents(QueryTraversalContext.class);
Field field = (Field) fieldCtx.getSelectionSetContainer();
QueryVisitorFieldEnvironment fieldEnv = fieldCtx.getEnvironment();
GraphQLFieldsContainer fieldsContainer = fieldEnv.getFieldsContainer();
GraphQLFieldDefinition fieldDefinition = Introspection.getFieldDef(schema, fieldsContainer, field.getName());
GraphQLArgument graphQLArgument = fieldDefinition.getArgument(argument.getName());
String argumentName = graphQLArgument.getName();
Object argumentValue = fieldEnv.getArguments().getOrDefault(argumentName, null);
QueryVisitorFieldArgumentEnvironment environment = new QueryVisitorFieldArgumentEnvironmentImpl(
fieldDefinition, argument, graphQLArgument, argumentValue, variables, fieldEnv, context, schema);
QueryVisitorFieldArgumentInputValue inputValue = QueryVisitorFieldArgumentInputValueImpl
.incompleteArgumentInputValue(graphQLArgument);
context.setVar(QueryVisitorFieldArgumentEnvironment.class, environment);
context.setVar(QueryVisitorFieldArgumentInputValue.class, inputValue);
if (context.getPhase() == LEAVE) {
return postOrderCallback.visitArgument(environment);
}
return preOrderCallback.visitArgument(environment);
}
@Override
public TraversalControl visitObjectField(ObjectField node, TraverserContext<Node> context) {
QueryVisitorFieldArgumentInputValueImpl inputValue = context.getVarFromParents(QueryVisitorFieldArgumentInputValue.class);
GraphQLUnmodifiedType unmodifiedType = unwrapAll(inputValue.getInputType());
//
// technically a scalar type can have an AST object field - eg field( arg : Json) -> field(arg : { ast : "here" })
if (unmodifiedType instanceof GraphQLInputObjectType) {
GraphQLInputObjectType inputObjectType = (GraphQLInputObjectType) unmodifiedType;
GraphQLInputObjectField inputObjectTypeField = inputObjectType.getField(node.getName());
inputValue = inputValue.incompleteNewChild(inputObjectTypeField);
context.setVar(QueryVisitorFieldArgumentInputValue.class, inputValue);
}
return TraversalControl.CONTINUE;
}
@Override
protected TraversalControl visitValue(Value<?> value, TraverserContext<Node> context) {
if (context.getParentNode() instanceof VariableDefinition) {
visitVariableDefinition(((VariableDefinition) context.getParentNode()), context);
return TraversalControl.ABORT;
}
QueryVisitorFieldArgumentEnvironment fieldArgEnv = context.getVarFromParents(QueryVisitorFieldArgumentEnvironment.class);
QueryVisitorFieldArgumentInputValueImpl inputValue = context.getVarFromParents(QueryVisitorFieldArgumentInputValue.class);
// previous visits have set up the previous information
inputValue = inputValue.completeArgumentInputValue(value);
context.setVar(QueryVisitorFieldArgumentInputValue.class, inputValue);
QueryVisitorFieldArgumentValueEnvironment environment = new QueryVisitorFieldArgumentValueEnvironmentImpl(
schema, fieldArgEnv.getFieldDefinition(), fieldArgEnv.getGraphQLArgument(), inputValue, context,
variables);
if (context.getPhase() == LEAVE) {
return postOrderCallback.visitArgumentValue(environment);
}
return preOrderCallback.visitArgumentValue(environment);
}
}