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package com.fasterxml.jackson.databind.introspect;
import java.lang.reflect.Constructor;
import java.lang.reflect.Member;
import java.lang.reflect.Type;
import java.util.Objects;
import com.fasterxml.jackson.databind.JavaType;
import com.fasterxml.jackson.databind.util.ClassUtil;
public final class AnnotatedConstructor
extends AnnotatedWithParams
{
private static final long serialVersionUID = 1L;
protected final Constructor _constructor;
/**
* Field that is used to make JDK serialization work with this
* object.
*
* @since 2.1
*/
protected Serialization _serialization;
/*
/**********************************************************
/* Life-cycle
/**********************************************************
*/
public AnnotatedConstructor(TypeResolutionContext ctxt, Constructor constructor,
AnnotationMap classAnn, AnnotationMap[] paramAnn)
{
super(ctxt, classAnn, paramAnn);
_constructor = Objects.requireNonNull(constructor);
}
/**
* Method used for JDK serialization support
* @since 2.1
*/
protected AnnotatedConstructor(Serialization ser)
{
super(null, null, null);
_constructor = null;
_serialization = ser;
}
@Override
public AnnotatedConstructor withAnnotations(AnnotationMap ann) {
return new AnnotatedConstructor(_typeContext, _constructor, ann, _paramAnnotations);
}
/*
/**********************************************************
/* Annotated impl
/**********************************************************
*/
@Override
public Constructor getAnnotated() { return _constructor; }
@Override
public int getModifiers() { return _constructor.getModifiers(); }
@Override
public String getName() { return _constructor.getName(); }
@Override
public JavaType getType() {
return _typeContext.resolveType(getRawType());
}
@Override
public Class getRawType() {
return _constructor.getDeclaringClass();
}
/*
/**********************************************************
/* Extended API
/**********************************************************
*/
@Override
public int getParameterCount() {
return _constructor.getParameterCount();
}
@Override
public Class getRawParameterType(int index)
{
Class[] types = _constructor.getParameterTypes();
return (index >= types.length) ? null : types[index];
}
@Override
public JavaType getParameterType(int index) {
Type[] types = _constructor.getGenericParameterTypes();
if (index >= types.length) {
return null;
}
return _typeContext.resolveType(types[index]);
}
@Override
@Deprecated // since 2.7
public Type getGenericParameterType(int index) {
Type[] types = _constructor.getGenericParameterTypes();
if (index >= types.length) {
return null;
}
return types[index];
}
@Override
public final Object call() throws Exception {
// 31-Mar-2021, tatu: Note! This is faster than calling without arguments
// because JDK in its wisdom would otherwise allocate `new Object[0]` to pass
return _constructor.newInstance((Object[]) null);
}
@Override
public final Object call(Object[] args) throws Exception {
return _constructor.newInstance(args);
}
@Override
public final Object call1(Object arg) throws Exception {
return _constructor.newInstance(arg);
}
/*
/**********************************************************
/* AnnotatedMember impl
/**********************************************************
*/
@Override
public Class getDeclaringClass() { return _constructor.getDeclaringClass(); }
@Override
public Member getMember() { return _constructor; }
@Override
public void setValue(Object pojo, Object value)
throws UnsupportedOperationException
{
throw new UnsupportedOperationException("Cannot call setValue() on constructor of "
+getDeclaringClass().getName());
}
@Override
public Object getValue(Object pojo)
throws UnsupportedOperationException
{
throw new UnsupportedOperationException("Cannot call getValue() on constructor of "
+getDeclaringClass().getName());
}
/*
/**********************************************************
/* Extended API, specific annotations
/**********************************************************
*/
@Override
public String toString() {
final int argCount = _constructor.getParameterCount();
return String.format("[constructor for %s (%d arg%s), annotations: %s",
ClassUtil.nameOf(_constructor.getDeclaringClass()), argCount,
(argCount == 1) ? "" : "s", _annotations);
}
@Override
public int hashCode() {
// _constructor can be null for special case of JDK serialization so:
return Objects.hashCode(_constructor);
}
@Override
public boolean equals(Object o) {
if (o == this) return true;
if (!ClassUtil.hasClass(o, getClass())) {
return false;
}
AnnotatedConstructor other = (AnnotatedConstructor) o;
return Objects.equals(_constructor, other._constructor);
}
/*
/**********************************************************
/* JDK serialization handling
/**********************************************************
*/
Object writeReplace() {
return new AnnotatedConstructor(new Serialization(_constructor));
}
Object readResolve() {
Class clazz = _serialization.clazz;
try {
Constructor ctor = clazz.getDeclaredConstructor(_serialization.args);
// 06-Oct-2012, tatu: Has "lost" its security override, must force back
if (!ctor.isAccessible()) {
ClassUtil.checkAndFixAccess(ctor, false);
}
return new AnnotatedConstructor(null, ctor, null, null);
} catch (Exception e) {
throw new IllegalArgumentException("Could not find constructor with "
+_serialization.args.length+" args from Class '"+clazz.getName());
}
}
/**
* Helper class that is used as the workaround to persist
* Field references. It basically just stores declaring class
* and field name.
*/
private final static class Serialization
implements java.io.Serializable
{
private static final long serialVersionUID = 1L;
protected Class clazz;
protected Class[] args;
public Serialization(Constructor ctor) {
clazz = ctor.getDeclaringClass();
args = ctor.getParameterTypes();
}
}
}