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package sun.reflect.generics.repository;

import java.lang.reflect.Type;
import sun.reflect.generics.factory.GenericsFactory;
import sun.reflect.generics.parser.SignatureParser;
import sun.reflect.generics.tree.FieldTypeSignature;
import sun.reflect.generics.tree.MethodTypeSignature;
import sun.reflect.generics.tree.TypeSignature;
import sun.reflect.generics.visitor.Reifier;



This class represents the generic type information for a constructor. The code is not dependent on a particular reflective implementation. It is designed to be used unchanged by at least core reflection and JDI.
/** * This class represents the generic type information for a constructor. * The code is not dependent on a particular reflective implementation. * It is designed to be used unchanged by at least core reflection and JDI. */
public class ConstructorRepository extends GenericDeclRepository<MethodTypeSignature> {
The generic parameter types. Lazily initialized.
/** The generic parameter types. Lazily initialized. */
private volatile Type[] parameterTypes;
The generic exception types. Lazily initialized.
/** The generic exception types. Lazily initialized. */
private volatile Type[] exceptionTypes; // protected, to enforce use of static factory yet allow subclassing protected ConstructorRepository(String rawSig, GenericsFactory f) { super(rawSig, f); } protected MethodTypeSignature parse(String s) { return SignatureParser.make().parseMethodSig(s); }
Static factory method.
Params:
  • rawSig – - the generic signature of the reflective object that this repository is servicing
  • f – - a factory that will provide instances of reflective objects when this repository converts its AST
Returns:a ConstructorRepository that manages the generic type information represented in the signature rawSig
/** * Static factory method. * @param rawSig - the generic signature of the reflective object * that this repository is servicing * @param f - a factory that will provide instances of reflective * objects when this repository converts its AST * @return a {@code ConstructorRepository} that manages the generic type * information represented in the signature {@code rawSig} */
public static ConstructorRepository make(String rawSig, GenericsFactory f) { return new ConstructorRepository(rawSig, f); } /* * When queried for a particular piece of type information, the * general pattern is to consult the corresponding cached value. * If the corresponding field is non-null, it is returned. * If not, it is created lazily. This is done by selecting the appropriate * part of the tree and transforming it into a reflective object * using a visitor, which is created by feeding it the factory * with which the repository was created. */ public Type[] getParameterTypes() { Type[] value = parameterTypes; if (value == null) { value = computeParameterTypes(); parameterTypes = value; } return value.clone(); } public Type[] getExceptionTypes() { Type[] value = exceptionTypes; if (value == null) { value = computeExceptionTypes(); exceptionTypes = value; } return value.clone(); } private Type[] computeParameterTypes() { // first, extract parameter type subtree(s) from AST TypeSignature[] pts = getTree().getParameterTypes(); // create array to store reified subtree(s) int length = pts.length; Type[] parameterTypes = new Type[length]; // reify all subtrees for (int i = 0; i < length; i++) { Reifier r = getReifier(); // obtain visitor pts[i].accept(r); // reify subtree // extract result from visitor and store it parameterTypes[i] = r.getResult(); } return parameterTypes; } private Type[] computeExceptionTypes() { // first, extract exception type subtree(s) from AST FieldTypeSignature[] ets = getTree().getExceptionTypes(); // create array to store reified subtree(s) int length = ets.length; Type[] exceptionTypes = new Type[length]; // reify all subtrees for (int i = 0; i < length; i++) { Reifier r = getReifier(); // obtain visitor ets[i].accept(r); // reify subtree // extract result from visitor and store it exceptionTypes[i] = r.getResult(); } return exceptionTypes; } }