|
| 1 | +/* |
| 2 | + * Jooby https://jooby.io |
| 3 | + * Apache License Version 2.0 https://jooby.io/LICENSE.txt |
| 4 | + * Copyright 2014 Edgar Espina |
| 5 | + */ |
| 6 | +package io.jooby.internal.apt.ws; |
| 7 | + |
| 8 | +import io.jooby.internal.apt.*; |
| 9 | + |
| 10 | +import javax.lang.model.element.ExecutableElement; |
| 11 | +import javax.lang.model.element.TypeElement; |
| 12 | +import javax.lang.model.element.VariableElement; |
| 13 | +import javax.lang.model.type.TypeMirror; |
| 14 | +import java.util.Map; |
| 15 | +import java.util.StringJoiner; |
| 16 | + |
| 17 | +import static io.jooby.internal.apt.CodeBlock.*; |
| 18 | +import static java.lang.System.lineSeparator; |
| 19 | + |
| 20 | +public class WsRoute extends WebRoute<WsRouter> { |
| 21 | + |
| 22 | + private static final Map<String, WsLifecycle> LIFECYCLE_ANNOTATIONS = |
| 23 | + Map.of( |
| 24 | + "io.jooby.annotation.ws.OnConnect", WsLifecycle.CONNECT, |
| 25 | + "io.jooby.annotation.ws.OnMessage", WsLifecycle.MESSAGE, |
| 26 | + "io.jooby.annotation.ws.OnClose", WsLifecycle.CLOSE, |
| 27 | + "io.jooby.annotation.ws.OnError", WsLifecycle.ERROR); |
| 28 | + |
| 29 | + private WsLifecycle wsLifecycle; |
| 30 | + |
| 31 | + public WsRoute(WsRouter router, ExecutableElement method) { |
| 32 | + super(router, method); |
| 33 | + chekWsAnnotations(); |
| 34 | + } |
| 35 | + |
| 36 | + private void chekWsAnnotations() { |
| 37 | + for (var entry : LIFECYCLE_ANNOTATIONS.entrySet()) { |
| 38 | + if (AnnotationSupport.findAnnotationByName(this.method, entry.getKey()) != null) { |
| 39 | + this.wsLifecycle = entry.getValue(); |
| 40 | + validateLifecycleParameters(context, method); |
| 41 | + break; |
| 42 | + } |
| 43 | + } |
| 44 | + } |
| 45 | + |
| 46 | + public WsLifecycle getWsLifecycle() { |
| 47 | + return wsLifecycle; |
| 48 | + } |
| 49 | + |
| 50 | + @Override |
| 51 | + public boolean hasBeanValidation() { |
| 52 | + return false; |
| 53 | + } |
| 54 | + |
| 55 | + @Override |
| 56 | + public TypeDefinition getReturnType() { |
| 57 | + var types = context.getProcessingEnvironment().getTypeUtils(); |
| 58 | + return new TypeDefinition(types, method.getReturnType()); |
| 59 | + } |
| 60 | + |
| 61 | + private String wsParameterName(MvcParameter parameter) { |
| 62 | + String rawParamType = parameter.getType().getRawType().toString(); |
| 63 | + var name = WsParamTypes.generateArgumentName(rawParamType); |
| 64 | + if (name != null) { |
| 65 | + return name; |
| 66 | + } |
| 67 | + |
| 68 | + getContext() |
| 69 | + .error("Unsupported websocket handler parameter type: %s.", rawParamType); |
| 70 | + return "null"; |
| 71 | + } |
| 72 | + |
| 73 | + private String paramList() { |
| 74 | + var joiner = new StringJoiner(", ", "(", ")"); |
| 75 | + for (var param : getParameters(true)) { |
| 76 | + joiner.add(wsParameterName(param)); |
| 77 | + } |
| 78 | + return joiner.toString(); |
| 79 | + } |
| 80 | + |
| 81 | + public String invocation(boolean kt) { |
| 82 | + return makeCall(kt, paramList(), false, false); |
| 83 | + } |
| 84 | + |
| 85 | + public void appendBody(boolean kt, StringBuilder buffer, String indent) { |
| 86 | + buffer.append(statement(indent, var(kt), "c = this.factory.apply(ctx)", semicolon(kt))); |
| 87 | + |
| 88 | + TypeDefinition wsReturnType = getReturnType(); |
| 89 | + var expr = invocation(kt); |
| 90 | + |
| 91 | + if (isUncheckedCast()) { |
| 92 | + buffer |
| 93 | + .append(indent) |
| 94 | + .append( |
| 95 | + kt ? "@Suppress(\"UNCHECKED_CAST\") " : "@SuppressWarnings(\"unchecked\") ") |
| 96 | + .append(lineSeparator()); |
| 97 | + } |
| 98 | + |
| 99 | + if (wsReturnType.isVoid()) { |
| 100 | + buffer.append(statement(indent, expr, semicolon(kt))); |
| 101 | + return; |
| 102 | + } |
| 103 | + |
| 104 | + buffer.append( |
| 105 | + statement( |
| 106 | + indent, kt ? "val" : "var", " __wsReturn = ", expr, semicolon(kt))); |
| 107 | + String rawErasure = wsReturnType.getRawType().toString(); |
| 108 | + switch (rawErasure) { |
| 109 | + case "java.lang.String", "byte[]", "java.nio.ByteBuffer" -> |
| 110 | + buffer.append(statement(indent, "ws.send(__wsReturn)", semicolon(kt))); |
| 111 | + default -> buffer.append(statement(indent, "ws.render(__wsReturn)", semicolon(kt))); |
| 112 | + } |
| 113 | + } |
| 114 | + |
| 115 | + private void validateLifecycleParameters(MvcContext context, ExecutableElement method) { |
| 116 | + var env = context.getProcessingEnvironment(); |
| 117 | + var types = env.getTypeUtils(); |
| 118 | + var throwableType = env.getElementUtils().getTypeElement(Throwable.class.getName()).asType(); |
| 119 | + var allowed = WsParamTypes.getAllowedTypes(wsLifecycle); |
| 120 | + |
| 121 | + for (VariableElement parameter : method.getParameters()) { |
| 122 | + TypeMirror rawMirror = websocketParameterRawType(types, parameter); |
| 123 | + var raw = rawMirror.toString(); |
| 124 | + if (allowed.contains(raw)) { |
| 125 | + continue; |
| 126 | + } |
| 127 | + |
| 128 | + if (wsLifecycle == WsLifecycle.ERROR |
| 129 | + && throwableType != null |
| 130 | + && types.isAssignable(rawMirror, throwableType)) { |
| 131 | + continue; |
| 132 | + } |
| 133 | + |
| 134 | + context.error( |
| 135 | + "Illegal parameter type %s on websocket %s method %s#%s", |
| 136 | + raw, |
| 137 | + wsLifecycle.name().toLowerCase(), |
| 138 | + ((TypeElement) method.getEnclosingElement()).getQualifiedName(), |
| 139 | + method.getSimpleName()); |
| 140 | + } |
| 141 | + } |
| 142 | + |
| 143 | + private static TypeMirror websocketParameterRawType(javax.lang.model.util.Types types, |
| 144 | + VariableElement parameter) { |
| 145 | + return new TypeDefinition(types, parameter.asType()).getRawType(); |
| 146 | + } |
| 147 | +} |
0 commit comments