jodd.introspector.Ctors Maven / Gradle / Ivy
// Copyright (c) 2003-present, Jodd Team (http://jodd.org)
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice,
// this list of conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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package jodd.introspector;
import java.lang.reflect.Constructor;
/**
* Constructors collection.
*/
public class Ctors {
protected final ClassDescriptor classDescriptor;
protected final CtorDescriptor[] allCtors;
protected CtorDescriptor defaultCtor;
public Ctors(final ClassDescriptor classDescriptor) {
this.classDescriptor = classDescriptor;
this.allCtors = inspectConstructors();
}
/**
* Inspects all declared constructors of a target type.
*/
protected CtorDescriptor[] inspectConstructors() {
Class type = classDescriptor.getType();
Constructor[] ctors = type.getDeclaredConstructors();
CtorDescriptor[] allCtors = new CtorDescriptor[ctors.length];
for (int i = 0; i < ctors.length; i++) {
Constructor ctor = ctors[i];
CtorDescriptor ctorDescriptor = createCtorDescriptor(ctor);
allCtors[i] = ctorDescriptor;
if (ctorDescriptor.isDefault()) {
defaultCtor = ctorDescriptor;
}
}
return allCtors;
}
/**
* Creates new {@link CtorDescriptor}.
*/
protected CtorDescriptor createCtorDescriptor(final Constructor ctor) {
return new CtorDescriptor(classDescriptor, ctor);
}
// ---------------------------------------------------------------- get
/**
* Returns default (no-args) constructor descriptor.
*/
public CtorDescriptor getDefaultCtor() {
return defaultCtor;
}
/**
* Finds constructor description that matches given argument types.
*/
public CtorDescriptor getCtorDescriptor(final Class... args) {
ctors:
for (CtorDescriptor ctorDescriptor : allCtors) {
Class[] arg = ctorDescriptor.getParameters();
if (arg.length != args.length) {
continue;
}
for (int j = 0; j < arg.length; j++) {
if (arg[j] != args[j]) {
continue ctors;
}
}
return ctorDescriptor;
}
return null;
}
/**
* Returns all constructor descriptors.
*/
CtorDescriptor[] getAllCtorDescriptors() {
return allCtors;
}
}