/*license*\
XBN-Java: Copyright (C) 2014, Jeff Epstein (aliteralmind __DASH__ github __AT__ yahoo __DOT__ com)
This software is dual-licensed under the:
- Lesser General Public License (LGPL) version 3.0 or, at your option, any later version;
- Apache Software License (ASL) version 2.0.
Either license may be applied at your discretion. More information may be found at
- http://en.wikipedia.org/wiki/Multi-licensing.
The text of both licenses is available in the root directory of this project, under the names "LICENSE_lgpl-3.0.txt" and "LICENSE_asl-2.0.txt". The latest copies may be downloaded at:
- LGPL 3.0: https://www.gnu.org/licenses/lgpl-3.0.txt
- ASL 2.0: http://www.apache.org/licenses/LICENSE-2.0.txt
\*license*/
package com.github.xbn.lang.reflect;
import java.util.Objects;
import com.github.xbn.text.CrashIfString;
import java.lang.reflect.Method;
/**
<p>Builder for obtaining a method, with runtime errors only (the original exception is accessible with {@code getCause()})</p>
* @since 0.1.0
* @author Copyright (C) 2014, Jeff Epstein ({@code aliteralmind __DASH__ github __AT__ yahoo __DOT__ com}), dual-licensed under the LGPL (version 3.0 or later) or the ASL (version 2.0). See source code for details. <a href="http://xbnjava.aliteralmind.com">{@code http://xbnjava.aliteralmind.com}</a>, <a href="https://github.com/aliteralmind/xbnjava">{@code https://github.com/aliteralmind/xbnjava}</a>
**/
public class GetMethodWithRtx {
//state
private Class<?> clsWMthd = null ;
private Class<?>[] aClsPrmTyps = null ;
private String sMthdNm = null ;
private boolean bParamsSet = false;
private final Declared declared;
public static final Class<?>[] EMPTY_CLASS_ARRAY = new Class<?>[]{};
//public
public GetMethodWithRtx(Declared declared) {
resetGDMR();
Objects.requireNonNull(declared, "declared");
this.declared = declared;
}
public GetMethodWithRtx reset() {
resetGDMR();
return this;
}
protected final void resetGDMR() {
sMthdNm = null;
clsWMthd = null;
aClsPrmTyps = null;
bParamsSet = false;
}
public GetMethodWithRtx containingClass(String fq_className) {
return containingClass(ReflectRtxUtil.getClassForName(fq_className, "fq_className"));
}
public GetMethodWithRtx containingClass(Object object) {
return containingClass(ReflectRtxUtil.getClass(object, null));
}
public GetMethodWithRtx containingClass(Class<?> cls) {
if(cls == null) {
throw new NullPointerException("cls");
}
clsWMthd = cls;
return this;
}
public GetMethodWithRtx mainMethod() {
name("main");
return paramTypes(new Class<?>[]{String[].class});
}
public GetMethodWithRtx name(String method_name) {
CrashIfString.nullEmpty(method_name, "method_name", null);
sMthdNm = method_name;
return this;
}
public GetMethodWithRtx noParams() {
return paramTypes(EMPTY_CLASS_ARRAY);
}
public GetMethodWithRtx paramTypes(Class<?>[] class_paramTypes) {
if(bParamsSet) {
throw new IllegalStateException("Param types already set.");
}
bParamsSet = true;
aClsPrmTyps = class_paramTypes;
return this;
}
public Method get() {
return getWithExtraInfo(null);
}
public Method getWithExtraInfo(Object xtra_errInfo) {
if(sMthdNm == null) {
throw new IllegalStateException("Method name not declared. Must call name(s).");
}
if(!bParamsSet) {
throw new IllegalStateException("Parameters not declared. Must call paramTypes(cls...).");
}
return ReflectRtxUtil.getMethod(clsWMthd, sMthdNm, declared, xtra_errInfo, aClsPrmTyps);
}
}