@Override
public void generate(JDefinedClass cls, GenerationContext context) {
if (classSpec.getFields().isEmpty()) {
return; // No equals needed.
}
// Import the objects class, for hash coding.
JClass objects = context.getTypeManager().getClassDirect("java.util.Objects");
// Create the equals method.
JMethod hashMethod = cls.method(JMod.PUBLIC, int.class, "hashCode");
hashMethod.annotate(Override.class);
JBlock body = hashMethod.body();
// Check if the object is null.
JVar hash = body.decl(JType.parse(context.getCodeModel(), "int"), "hash", JExpr.lit(3));
// Do check for each field.
for (DataFieldSpecification fieldSpec : classSpec.getFields()) {
List<String> parts = NameFormat.namesToList(fieldSpec.getFieldName());
String camelCaseFieldName = NameFormat.camelCase(parts, false);
// Get the field value.
JExpression thisField = JExpr.refthis(camelCaseFieldName);
// Accumulate the hash code.
JExpression fieldHashCode = objects.staticInvoke("hashCode").arg(thisField);
body.assign(hash, JExpr.lit(79).mul(hash).plus(fieldHashCode));
}
// Return the processed hash value.
body._return(hash);
}
private ModifierGenerator(
final PluginContext pluginContext,
final DefinedTypeOutline classOutline,
final String modifierClassName,
final String modifierInterfaceName,
final Collection<TypeOutline> interfaces,
final String modifierMethodName,
final boolean implement)
throws JClassAlreadyExistsException {
this.classOutline = classOutline;
final JDefinedClass definedClass = classOutline.getImplClass();
this.implement = implement;
this.modifierClass =
definedClass._class(
JMod.PUBLIC, modifierClassName, classOutline.getImplClass().getClassType());
if (interfaces != null) {
for (final TypeOutline interfaceOutline : interfaces) {
this.modifierClass._implements(
pluginContext.ref(interfaceOutline.getImplClass(), modifierInterfaceName, true));
}
}
final JFieldRef cachedModifierField;
if (!"java.lang.Object".equals(definedClass._extends().fullName())) {
this.modifierClass._extends(
pluginContext.ref(definedClass._extends(), modifierClassName, false));
cachedModifierField = JExpr.refthis(ModifierGenerator.MODIFIER_CACHE_FIELD_NAME);
} else {
if (implement) {
cachedModifierField =
JExpr._this()
.ref(
definedClass.field(
JMod.PROTECTED | JMod.TRANSIENT,
this.modifierClass,
ModifierGenerator.MODIFIER_CACHE_FIELD_NAME));
} else {
cachedModifierField = null;
}
}
final JDefinedClass typeDefinition =
classOutline.isInterface()
&& ((DefinedInterfaceOutline) classOutline).getSupportInterface() != null
? ((DefinedInterfaceOutline) classOutline).getSupportInterface()
: definedClass;
final JMethod modifierMethod =
typeDefinition.method(JMod.PUBLIC, this.modifierClass, modifierMethodName);
if (this.implement) {
final JConditional ifCacheNull =
modifierMethod.body()._if(JExpr._null().eq(cachedModifierField));
ifCacheNull._then().assign(cachedModifierField, JExpr._new(this.modifierClass));
modifierMethod.body()._return(JExpr.cast(this.modifierClass, cachedModifierField));
}
}