@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);
}