本文整理了Java中com.sun.codemodel.JClass类的一些代码示例，展示了JClass类的具体用法。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。JClass类的具体详情如下：
包路径：com.sun.codemodel.JClass
类名称：JClass

JClass介绍

[英]Represents a Java reference type, such as a class, an interface, an enum, an array type, a parameterized type.

To be exact, this object represents an "use" of a reference type, not necessarily a declaration of it, which is modeled as JDefinedClass.
[中]表示Java引用类型，例如类、接口、枚举、数组类型和参数化类型。
确切地说，这个对象表示引用类型的“使用”，而不一定是它的声明，它被建模为JDefinedClass。

代码示例

代码示例来源：origin: joelittlejohn/jsonschema2pojo

private JFieldVar addQuickLookupMap(JDefinedClass _enum, JType backingType) {
  JClass lookupType = _enum.owner().ref(Map.class).narrow(backingType.boxify(), _enum);
  JFieldVar lookupMap = _enum.field(JMod.PRIVATE | JMod.STATIC | JMod.FINAL, lookupType, "CONSTANTS");
  JClass lookupImplType = _enum.owner().ref(HashMap.class).narrow(backingType.boxify(), _enum);
  lookupMap.init(JExpr._new(lookupImplType));
  JForEach forEach = _enum.init().forEach(_enum, "c", JExpr.invoke("values"));
  JInvocation put = forEach.body().invoke(lookupMap, "put");
  put.arg(forEach.var().ref("value"));
  put.arg(forEach.var());
  return lookupMap;
}

代码示例来源：origin: joelittlejohn/jsonschema2pojo

private void addEquals(JDefinedClass jclass, JsonNode node) {
  Map<String, JFieldVar> fields = removeFieldsExcludedFromEqualsAndHashCode(jclass.fields(), node);
  JBlock body = equals.body();
  JVar rhsVar = body.decl(jclass, "rhs").init(JExpr.cast(jclass, otherObject));
  JExpression result = JExpr.lit(true);
  if (!jclass._extends().fullName().equals(Object.class.getName())) {
    result = result.cand(JExpr._super().invoke("equals").arg(rhsVar));
        JClass doubleClass = jclass.owner().ref(Double.class);
        fieldEquals = doubleClass.staticInvoke("doubleToLongBits").arg(thisFieldRef).eq(
            doubleClass.staticInvoke("doubleToLongBits").arg(otherFieldRef));
      } else if ("float".equals(fieldVar.type().name())) {
        JClass floatClass = jclass.owner().ref(Float.class);
        fieldEquals = floatClass.staticInvoke("floatToIntBits").arg(thisFieldRef).eq(
            floatClass.staticInvoke("floatToIntBits").arg(otherFieldRef));
      } else {
        fieldEquals = thisFieldRef.eq(otherFieldRef);
      fieldEquals = jclass.owner().ref(Arrays.class).staticInvoke("equals").arg(thisFieldRef).arg(otherFieldRef);
    } else {
      fieldEquals = thisFieldRef.eq(otherFieldRef).cor(
  body._return(result);
  equals.annotate(Override.class);

代码示例来源：origin: apache/drill

public static JBlock getDrillObject(JCodeModel m, ObjectInspector oi,
 JVar returnOI, JVar returnValueHolder, JVar returnValue) {
 JBlock block = new JBlock(false, false);
 switch(oi.getCategory()) {
  case PRIMITIVE: {
   switch(poi.getPrimitiveCategory()) {
    case BOOLEAN:{
     JConditional jc = block._if(returnValue.eq(JExpr._null()));
     jc._then().assign(returnValueHolder.ref("isSet"), JExpr.lit(0));
     jc._else().assign(returnValueHolder.ref("isSet"), JExpr.lit(1));
     JVar castedOI = jc._else().decl(
      m.directClass(BooleanObjectInspector.class.getCanonicalName()), "castOI", JExpr._null());
     jc._else().assign(castedOI,
      JExpr.cast(m.directClass(BooleanObjectInspector.class.getCanonicalName()), returnOI));
     JConditional booleanJC = jc._else()._if(castedOI.invoke("get").arg(returnValue));
      m.directClass(ByteObjectInspector.class.getCanonicalName()), "castOI", JExpr._null());
      castedOI.invoke("get").arg(returnValue));
     return block;
      castedOI.invoke("get").arg(returnValue));
     return block;
       .arg(m.directClass(org.joda.time.DateTimeZone.class.getCanonicalName()).staticRef("UTC")).invoke("getMillis"));
     return block;

代码示例来源：origin: joelittlejohn/jsonschema2pojo

private boolean extendsParcelable(final JDefinedClass jclass) {
  final java.util.Iterator<JClass> interfaces = jclass._extends() != null ? jclass._extends()._implements() : null;
  if (interfaces != null) {
    while (interfaces.hasNext()) {
      final JClass iface = interfaces.next();
      if (iface.erasure().name().equals("Parcelable")) {
        return true;
      }
    }
  }
  return false;
}

代码示例来源：origin: joelittlejohn/jsonschema2pojo

private static JDefinedClass definedClassOrNullFromType(JType type)
{
  if (type == null || type.isPrimitive())
  {
    return null;
  }
  JClass fieldClass = type.boxify();
  JPackage jPackage = fieldClass._package();
  return jPackage._getClass(fieldClass.name());
}

代码示例来源：origin: joelittlejohn/jsonschema2pojo

JClass listGenericType = ((JClass) fieldType).getTypeParameters().get(0);
JClass listImplClass = fieldType.owner().ref(ArrayList.class);
listImplClass = listImplClass.narrow(listGenericType);
JInvocation newListImpl = JExpr._new(listImplClass);
  JInvocation invokeAsList = fieldType.owner().ref(Arrays.class).staticInvoke("asList");
  for (JsonNode defaultValue : node) {
    invokeAsList.arg(getDefaultValue(listGenericType, defaultValue));
  newListImpl.arg(invokeAsList);
} else if (!ruleFactory.getGenerationConfig().isInitializeCollections()) {
  return JExpr._null();

代码示例来源：origin: joelittlejohn/jsonschema2pojo

JBlock body = toString.body();
JClass stringBuilderClass = jclass.owner().ref(StringBuilder.class);
JVar sb = body.decl(stringBuilderClass, "sb", JExpr._new(stringBuilderClass));
body.add(sb
    .invoke("append").arg(jclass.dotclass().invoke("getName"))
    .invoke("append").arg(JExpr.lit('@'))
    .invoke("append").arg(
        jclass.owner().ref(Integer.class).staticInvoke("toHexString").arg(
            jclass.owner().ref(System.class).staticInvoke("identityHashCode").arg(JExpr._this())))
    .invoke("append").arg(JExpr.lit('[')));
if (!jclass._extends().fullName().equals(Object.class.getName())) {
  JVar baseLength = body.decl(jclass.owner().INT, "baseLength", sb.invoke("length"));
  JVar superString = body.decl(jclass.owner().ref(String.class), "superString", JExpr._super().invoke("toString"));
            JExpr.refthis(fieldVar.name()).eq(JExpr._null()),
            JExpr.lit("<null>"),
            jclass.owner().ref(Arrays.class).staticInvoke("toString")
                .arg(JExpr.refthis(fieldVar.name()))
                .invoke("replace").arg(JExpr.lit('[')).arg(JExpr.lit('{'))
body._return(sb.invoke("toString"));
toString.annotate(Override.class);

代码示例来源：origin: joelittlejohn/jsonschema2pojo

private void addHashCode(JDefinedClass jclass, JsonNode node) {
  Map<String, JFieldVar> fields = removeFieldsExcludedFromEqualsAndHashCode(jclass.fields(), node);
    JFieldRef fieldRef = JExpr.refthis(fieldVar.name());
        fieldHash = fieldRef;
      } else if ("double".equals(fieldVar.type().name())) {
        JClass doubleClass = jclass.owner().ref(Double.class);
        JExpression longField = doubleClass.staticInvoke("doubleToLongBits").arg(fieldRef);
        fieldHash = JExpr.cast(jclass.owner().INT,
            longField.xor(longField.shrz(JExpr.lit(32))));
      } else if ("float".equals(fieldVar.type().name())) {
        fieldHash = jclass.owner().ref(Float.class).staticInvoke("floatToIntBits").arg(fieldRef);
      } else {
        fieldHash = JExpr.cast(jclass.owner().INT, fieldRef);
      fieldHash = jclass.owner().ref(Arrays.class).staticInvoke("hashCode").arg(fieldRef);
    } else {
      fieldHash = JOp.cond(fieldRef.eq(JExpr._null()), JExpr.lit(0), fieldRef.invoke("hashCode"));
    body.assign(result, result.mul(JExpr.lit(31)).plus(fieldHash));
  if (!jclass._extends().fullName().equals(Object.class.getName())) {
    body.assign(result, result.mul(JExpr.lit(31)).plus(JExpr._super().invoke("hashCode")));
  body._return(result);
  hashCode.annotate(Override.class);

代码示例来源：origin: com.googlecode.jsonschema2pojo/jsonschema2pojo-core

private void addToString(JDefinedClass jclass) {
  JMethod toString = jclass.method(JMod.PUBLIC, String.class, "toString");
  JBlock body = toString.body();
  JInvocation reflectionToString = jclass.owner().ref(ToStringBuilder.class).staticInvoke("reflectionToString");
  reflectionToString.arg(JExpr._this());
  body._return(reflectionToString);
  toString.annotate(Override.class);
}

代码示例来源：origin: joelittlejohn/jsonschema2pojo

private JMethod addPublicSetMethod(JDefinedClass jclass, JMethod internalSetMethod) {
  JMethod method = jclass.method(PUBLIC, jclass.owner().VOID, SETTER_NAME);
  JVar nameParam = method.param(String.class, "name");
  JVar valueParam = method.param(Object.class, "value");
  JBlock body = method.body();
  JBlock notFound = body._if(JOp.not(invoke(internalSetMethod).arg(nameParam).arg(valueParam)))._then();
  // if we have additional properties, then put value.
  JMethod getAdditionalProperties = jclass.getMethod("getAdditionalProperties", new JType[] {});
  if (getAdditionalProperties != null) {
    JType additionalPropertiesType = ((JClass) (getAdditionalProperties.type())).getTypeParameters().get(1);
    notFound.add(invoke(getAdditionalProperties).invoke("put").arg(nameParam)
        .arg(cast(additionalPropertiesType, valueParam)));
  }
  // else throw exception.
  else {
    notFound._throw(illegalArgumentInvocation(jclass, nameParam));
  }
  return method;
}

代码示例来源：origin: e-biz/androidkickstartr

private void addListNavigationConfiguration(JBlock configureActionBarBody) {
  jClass._implements(ref.sNavigationListener());
  JBlock onNavigationItemSelectedBody = onNavigationItemSelectedMethod.body();
  if (appDetails.isViewPager()) {
    onNavigationItemSelectedBody.invoke(pagerField, "setCurrentItem").arg(itemPositionParam);
  onNavigationItemSelectedBody._return(JExpr.TRUE);
  JFieldRef rArrayLocations = ref.r().staticRef("array").ref("locations");
  JExpression rLayoutSherlockSpinner = JExpr.direct("android.R.layout.simple_list_item_1");
  JInvocation createFromResource = arrayAdapter.staticInvoke("createFromResource"). //
      arg(contextVar). //
      arg(rArrayLocations). //
      arg(rLayoutSherlockSpinner);
  JClass listType = arrayAdapter.narrow(ref.charSequence());
  JVar listVar = configureActionBarBody.decl(listType, "list", createFromResource);
  JFieldRef navigationModeList = ref.sActionBar().staticRef("NAVIGATION_MODE_LIST");
  configureActionBarBody.invoke(getSupportActionbar, "setNavigationMode").arg(navigationModeList);
  configureActionBarBody.invoke(getSupportActionbar, "setListNavigationCallbacks").//
      arg(listVar).//
      arg(JExpr._this());

代码示例来源：origin: mklemm/jaxb2-rich-contract-plugin

private JMethod generateLazyProxyInitGetter(final ClassOutline classOutline, final FieldOutline fieldOutline) {
  final JCodeModel m = classOutline.parent().getCodeModel();
  final JDefinedClass definedClass = classOutline.implClass;
  final String fieldName = fieldOutline.getPropertyInfo().getName(false);
  final String getterName = "get" + fieldOutline.getPropertyInfo().getName(true);
  final JFieldVar collectionField = definedClass.fields().get(fieldName);
  final JClass elementType = ((JClass) collectionField.type()).getTypeParameters().get(0);
  final JClass proxyFieldType = m.ref(BoundList.class).narrow(elementType);
  final JFieldRef collectionFieldRef = JExpr._this().ref(collectionField);
  final JFieldRef proxyField = JExpr._this().ref(collectionField.name() + BoundPropertiesPlugin.PROXY_SUFFIX);
  final JMethod oldGetter = definedClass.getMethod(getterName, new JType[0]);
  definedClass.methods().remove(oldGetter);
  final JMethod newGetter = definedClass.method(JMod.PUBLIC, proxyFieldType, getterName);
  newGetter.body()._if(collectionFieldRef.eq(JExpr._null()))._then().assign(collectionFieldRef, JExpr._new(m.ref(ArrayList.class).narrow(elementType)));
  final JBlock ifProxyNull = newGetter.body()._if(proxyField.eq(JExpr._null()))._then();
  ifProxyNull.assign(proxyField, JExpr._new(m.ref(BoundListProxy.class).narrow(elementType)).arg(collectionFieldRef));
  newGetter.body()._return(proxyField);
  return newGetter;
}

代码示例来源：origin: e-biz/androidkickstartr

jClass = jCodeModel._class(appDetails.getSampleFragmentPackage());
  jClass._extends(ref.ref(appDetails.getRoboSherlockFragmentPackage()));
} else if (appDetails.isRoboguice()) {
  jClass._extends(ref.roboFragment());
} else {
  jClass._extends(ref.fragment());
if (appDetails.isAndroidAnnotations()) {
  jClass.annotate(ref.efragment()).param("value", ref.r().staticRef("layout").ref("fragment_sample"));
  JMethod onCreateViewMethod = jClass.method(JMod.NONE, jCodeModel.VOID, "afterViews");
  onCreateViewMethod.annotate(ref.afterViews());
  onCreateViewMethodBody = onCreateViewMethod.body();
  JFieldRef field = ref.r().staticRef("id").ref("label_text");
  injectViewAnnotation.param("value", field);
  onCreateViewMethodBody = onCreateViewMethod.body();
  onCreateViewMethodBody._return(inflateView(inflaterParam, containerParam));
  onViewCreatedMethodBody.invoke(JExpr._super(), "onViewCreated").arg(viewParam).arg(savedInstanceStateParam);
  JVar contentViewVar = onCreateViewMethodBody.decl(ref.view(), "contentView", inflateInvoke);

代码示例来源：origin: Evolveum/midpoint

private void createFieldReferenceUseCreateItemBody(JFieldVar field, JMethod method) {
  JClass type = ((JClass) field.type()).getTypeParameters().get(0);
  JBlock body = method.body();
  JExpression initExpr;
  initExpr = constructorExpression(method, type);
  JVar decl = body.decl(type, field.name(), initExpr);
  JInvocation invocation = body.invoke(decl, METHOD_SETUP_CONTAINER);
  invocation.arg(JExpr.invoke(method.listParams()[0], "getObject"));
  body._return(decl);
}

代码示例来源：origin: e-biz/androidkickstartr

private void addTabNavigationConfiguration(JBlock configureActionBarBody) {
  jClass._implements(ref.sTabListener());
  JMethod onTabSelectedMethod = jClass.method(JMod.PUBLIC, jCodeModel.VOID, "onTabSelected");
  JVar tabParam = onTabSelectedMethod.param(ref.sTab(), "tab");
  onTabSelectedMethod.param(ref.fragmentTransaction(), "ft");
  onTabSelectedMethod.annotate(ref.override());
    JBlock onTabSelectedBody = onTabSelectedMethod.body();
    JVar positionVar = onTabSelectedBody.decl(jCodeModel.INT, "position", tabParam.invoke("getPosition"));
    onTabSelectedBody.invoke(pagerField, "setCurrentItem").arg(positionVar);
  jClass.direct("@Override\n " + //
      "public void onTabUnselected(Tab tab, FragmentTransaction ft) {}");
      "public void onTabReselected(Tab tab, FragmentTransaction ft) {}");
  JInvocation getSupportActionBar = JExpr.invoke("getSupportActionBar");
  JFieldRef navigationModeList = ref.sActionBar().staticRef("NAVIGATION_MODE_TABS");
  configureActionBarBody.invoke(getSupportActionBar, "setNavigationMode").arg(navigationModeList);
  JForEach forEachLocation = configureActionBarBody.forEach(ref.string(), "location", locationsField);

代码示例来源：origin: com.linkedin.pegasus/restli-tools

private static void generateQueryParamSetMethod(JDefinedClass derivedBuilderClass, ParameterSchema param, JClass paramClass, JClass paramItemsClass)
{
 final String paramName = param.getName();
 final boolean isOptional = RestLiToolsUtils.isParameterOptional(param);
 final String methodName = RestLiToolsUtils.nameCamelCase(paramName + "Param");
 final JMethod setMethod = derivedBuilderClass.method(JMod.PUBLIC, derivedBuilderClass, methodName);
 final JVar setMethodParam = setMethod.param(paramClass, "value");
 setMethod.body().add(JExpr._super().invoke(isOptional ? "setParam" : "setReqParam").arg(paramName).arg(setMethodParam).arg(paramItemsClass.dotclass()));
 setMethod.body()._return(JExpr._this());
 generateParamJavadoc(setMethod, setMethodParam, param);
}

代码示例来源：origin: apache/drill

private void generateSetup(ClassGenerator<?> g, JVar[] workspaceJVars) {
 JCodeModel m = g.getModel();
 JBlock sub = new JBlock(true, true);
 JVar oiArray = sub.decl(
  m._ref(ObjectInspector[].class),
  "argOIs",
  JExpr.newArray(m._ref(ObjectInspector.class), argTypes.length));
 JClass oih = m.directClass(ObjectInspectorHelper.class.getCanonicalName());
 JClass mt = m.directClass(TypeProtos.MinorType.class.getCanonicalName());
 JClass mode = m.directClass(DataMode.class.getCanonicalName());
 for(int i=0; i<argTypes.length; i++) {
  sub.assign(
   oiArray.component(JExpr.lit(i)),
   oih.staticInvoke("getDrillObjectInspector")
    .arg(mode.staticInvoke("valueOf").arg(JExpr.lit(argTypes[i].getMode().getNumber())))
    .arg(mt.staticInvoke("valueOf").arg(JExpr.lit(argTypes[i].getMinorType().getNumber())))
    .arg((((PrimitiveObjectInspector) returnOI).getPrimitiveCategory() ==
      PrimitiveObjectInspector.PrimitiveCategory.STRING) ? JExpr.lit(true) : JExpr.lit(false)));

代码示例来源：origin: joelittlejohn/jsonschema2pojo

private JMethod addGetter(JDefinedClass c, JFieldVar field, String jsonPropertyName, JsonNode node, boolean isRequired, boolean usesOptional) {
  JType type = getReturnType(c, field, isRequired, usesOptional);
  JMethod getter = c.method(JMod.PUBLIC, type, getGetterName(jsonPropertyName, field.type(), node));
  JBlock body = getter.body();
  if ((ruleFactory.getGenerationConfig().isUseOptionalForGetters() || usesOptional) && !isRequired
      && field.type().isReference()) {
    body._return(c.owner().ref("java.util.Optional").staticInvoke("ofNullable").arg(field));
  } else {
    body._return(field);
  }
  return getter;
}

代码示例来源：origin: jpmml/jpmml-model

@Override
  public List<JMethod> apply(JClass clazz, JClass superClazz){
    String parameterName = NameConverter.standard.toVariableName((clazz.erasure()).name());
    if(!JJavaName.isJavaIdentifier(parameterName)){
      parameterName = ("_" + parameterName);
    }
    JMethod visitorVisit = visitorInterface.method(JMod.PUBLIC, visitorActionEnum, "visit");
    visitorVisit.param(clazz, parameterName);
    JMethod abstractVisitorVisit = abstractVisitorClazz.method(JMod.PUBLIC, visitorActionEnum, "visit");
    abstractVisitorVisit.annotate(Override.class);
    abstractVisitorVisit.param(clazz, parameterName);
    abstractVisitorVisit.body()._return(JExpr.invoke("visit").arg(JExpr.cast(superClazz.erasure(), JExpr.ref(parameterName))));
    return Arrays.asList(visitorVisit, abstractVisitorVisit);
  }
};

代码示例来源：origin: org.jvnet.jaxbcommons/jaxbcommons-core

protected JMethod generate$HashCode0(ClassContext classContext, final ClassItem classItem) {
 final JCodeModel codeModel = getCodeModel(classContext);
 final JMethod hashCode0 = classContext.implClass.method(JMod.PUBLIC, codeModel.INT, "hashCode");
 final JVar hashCodeStrategy = hashCode0.body().decl(
   JMod.FINAL,
   codeModel.ref(HashCodeStrategy.class),
   "hashCodeStrategy",
   codeModel.ref(JAXBHashCodeStrategy.class).staticRef("INSTANCE"));
 final JMethod hashCode2 = generate$HashCode2(classContext, classItem);
 hashCode0.body()._return(
   JExpr._this().invoke(hashCode2).arg(JExpr._null()).arg(hashCodeStrategy));
 return hashCode0;
}