/*
 
* Copyright (c) 1996, 2015, Oracle and/or its affiliates. All rights reserved.
 
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 
*
 
* This code is free software; you can redistribute it and/or modify it
 
* under the terms of the GNU General Public License version 2 only, as
 
* published by the Free Software Foundation.
  
Oracle designates this
 
* particular file as subject to the "Classpath" exception as provided
 
* by Oracle in the LICENSE file that accompanied this code.
 
*
 
* This code is distributed in the hope that it will be useful, but WITHOUT
 
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 
* FITNESS FOR A PARTICULAR PURPOSE.
  
See the GNU General Public License
 
* version 2 for more details (a copy is included in the LICENSE file that
 
* accompanied this code).
 
*
 
* You should have received a copy of the GNU General Public License version
 
* 2 along with this work; if not, write to the Free Software Foundation,
 
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 
*
 
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 
* or visit www.oracle.com if you need additional information or have any
 
* questions.
 
*/

package java.beans;

import java.lang.ref.Reference;
import java.lang.reflect.Method;
import java.lang.reflect.Constructor;
import sun.reflect.misc.ReflectUtil;

/**
 
* A PropertyDescriptor describes one property that a Java Bean
 
* exports via a pair of accessor methods.
 
*/

public class PropertyDescriptor extends FeatureDescriptor {

    
private Reference<? extends Class<?>> propertyTypeRef;
    
private final MethodRef readMethodRef = new MethodRef();
    
private final MethodRef writeMethodRef = new MethodRef();
    
private Reference<? extends Class<?>> propertyEditorClassRef;

    
private boolean bound;
    
private boolean constrained;

    
// The base name of the method name which will be prefixed with the
    
// read and write method. If name == "foo" then the baseName is "Foo"
    
private String baseName;

    
private String writeMethodName;
    
private String readMethodName;

    
/**
     
* Constructs a PropertyDescriptor for a property that follows
     
* the standard Java convention by having getFoo and setFoo
     
* accessor methods.
  
Thus if the argument name is "fred", it will
     
* assume that the writer method is "setFred" and the reader method
     
* is "getFred" (or "isFred" for a boolean property).
  
Note that the
     
* property name should start with a lower case character, which will
     
* be capitalized in the method names.
     
*
     
* @param propertyName The programmatic name of the property.
     
* @param beanClass The Class object for the target bean.
  
For
     
*
          
example sun.beans.OurButton.class.
     
* @exception IntrospectionException if an exception occurs during
     
*
              
introspection.
     
*/

    
public PropertyDescriptor(String propertyName, Class<?> beanClass)
                
throws IntrospectionException {
        
this(propertyName, beanClass,
                
Introspector.IS_PREFIX + NameGenerator.capitalize(propertyName),
                
Introspector.SET_PREFIX + NameGenerator.capitalize(propertyName));
    
}

    
/**
     
* This constructor takes the name of a simple property, and method
     
* names for reading and writing the property.
     
*
     
* @param propertyName The programmatic name of the property.
     
* @param beanClass The Class object for the target bean.
  
For
     
*
          
example sun.beans.OurButton.class.
     
* @param readMethodName The name of the method used for reading the property
     
*
           
value.
  
May be null if the property is write-only.
     
* @param writeMethodName The name of the method used for writing the property
     
*
           
value.
  
May be null if the property is read-only.
     
* @exception IntrospectionException if an exception occurs during
     
*
              
introspection.
     
*/

    
public PropertyDescriptor(String propertyName, Class<?> beanClass,
                
String readMethodName, String writeMethodName)
                
throws IntrospectionException {
        
if (beanClass == null) {
            
throw new IntrospectionException("Target Bean class is null");
        
}
        
if (propertyName == null || propertyName.length() == 0) {
            
throw new IntrospectionException("bad property name");
        
}
        
if ("".equals(readMethodName) || "".equals(writeMethodName)) {
            
throw new IntrospectionException("read or write method name should not be the empty string");
        
}
        
setName(propertyName);
        
setClass0(beanClass);

        
this.readMethodName = readMethodName;
        
if (readMethodName != null && getReadMethod() == null) {
            
throw new IntrospectionException("Method not found: " + readMethodName);
        
}
        
this.writeMethodName = writeMethodName;
        
if (writeMethodName != null && getWriteMethod() == null) {
            
throw new IntrospectionException("Method not found: " + writeMethodName);
        
}
        
// If this class or one of its base classes allow PropertyChangeListener,
        
// then we assume that any properties we discover are "bound".
        
// See Introspector.getTargetPropertyInfo() method.
        
Class[] args = { PropertyChangeListener.class };
        
this.bound = null != Introspector.findMethod(beanClass, "addPropertyChangeListener", args.length, args);
    
}

    
/**
     
* This constructor takes the name of a simple property, and Method
     
* objects for reading and writing the property.
     
*
     
* @param propertyName The programmatic name of the property.
     
* @param readMethod The method used for reading the property value.
     
*
          
May be null if the property is write-only.
     
* @param writeMethod The method used for writing the property value.
     
*
          
May be null if the property is read-only.
     
* @exception IntrospectionException if an exception occurs during
     
*
              
introspection.
     
*/

    
public PropertyDescriptor(String propertyName, Method readMethod, Method writeMethod)
                
throws IntrospectionException {
        
if (propertyName == null || propertyName.length() == 0) {
            
throw new IntrospectionException("bad property name");
        
}
        
setName(propertyName);
        
setReadMethod(readMethod);
        
setWriteMethod(writeMethod);
    
}

    
/**
     
* Creates <code>PropertyDescriptor</code> for the specified bean
     
* with the specified name and methods to read/write the property value.
     
*
     
* @param bean
   
the type of the target bean
     
* @param base
   
the base name of the property (the rest of the method name)
     
* @param read
   
the method used for reading the property value
     
* @param write
  
the method used for writing the property value
     
* @exception IntrospectionException if an exception occurs during introspection
     
*
     
* @since 1.7
     
*/

    
PropertyDescriptor(Class<?> bean, String base, Method read, Method write) throws IntrospectionException {
        
if (bean == null) {
            
throw new IntrospectionException("Target Bean class is null");
        
}
        
setClass0(bean);
        
setName(Introspector.decapitalize(base));
        
setReadMethod(read);
        
setWriteMethod(write);
        
this.baseName = base;
    
}

    
/**
     
* Returns the Java type info for the property.
     
* Note that the {@code Class} object may describe
     
* primitive Java types such as {@code int}.
     
* This type is returned by the read method
     
* or is used as the parameter type of the write method.
     
* Returns {@code null} if the type is an indexed property
     
* that does not support non-indexed access.
     
*
     
* @return the {@code Class} object that represents the Java type info,
     
*
         
or {@code null} if the type cannot be determined
     
*/

    
public synchronized Class<?> getPropertyType() {
        
Class<?> type = getPropertyType0();
        
if (type
  
== null) {
            
try {
                
type = findPropertyType(getReadMethod(), getWriteMethod());
                
setPropertyType(type);
            
} catch (IntrospectionException ex) {
                
// Fall
            
}
        
}
        
return type;
    
}

    
private void setPropertyType(Class<?> type) {
        
this.propertyTypeRef = getWeakReference(type);
    
}

    
private Class<?> getPropertyType0() {
        
return (this.propertyTypeRef != null)
                
? this.propertyTypeRef.get()
                
: null;
    
}

    
/**
     
* Gets the method that should be used to read the property value.
     
*
     
* @return The method that should be used to read the property value.
     
* May return null if the property can't be read.
     
*/

    
public synchronized Method getReadMethod() {
        
Method readMethod = this.readMethodRef.get();
        
if (readMethod == null) {
            
Class<?> cls = getClass0();
            
if (cls == null || (readMethodName == null && !this.readMethodRef.isSet())) {
                
// The read method was explicitly set to null.
                
return null;
            
}
            
String nextMethodName = Introspector.GET_PREFIX + getBaseName();
            
if (readMethodName == null) {
                
Class<?> type = getPropertyType0();
                
if (type == boolean.class || type == null) {
                    
readMethodName = Introspector.IS_PREFIX + getBaseName();
                
} else {
                    
readMethodName = nextMethodName;
                
}
            
}

            
// Since there can be multiple write methods but only one getter
            
// method, find the getter method first so that you know what the
            
// property type is.
  
For booleans, there can be "is" and "get"
            
// methods.
  
If an "is" method exists, this is the official
            
// reader method so look for this one first.
            
readMethod = Introspector.findMethod(cls, readMethodName, 0);
            
if ((readMethod == null) && !readMethodName.equals(nextMethodName)) {
                
readMethodName = nextMethodName;
                
readMethod = Introspector.findMethod(cls, readMethodName, 0);
            
}
            
try {
                
setReadMethod(readMethod);
            
} catch (IntrospectionException ex) {
                
// fall
            
}
        
}
        
return readMethod;
    
}

    
/**
     
* Sets the method that should be used to read the property value.
     
*
     
* @param readMethod The new read method.
     
* @throws IntrospectionException if the read method is invalid
     
*/

    
public synchronized void setReadMethod(Method readMethod)
                                
throws IntrospectionException {
        
this.readMethodRef.set(readMethod);
        
if (readMethod == null) {
            
readMethodName = null;
            
return;
        
}
        
// The property type is determined by the read method.
        
setPropertyType(findPropertyType(readMethod, this.writeMethodRef.get()));
        
setClass0(readMethod.getDeclaringClass());

        
readMethodName = readMethod.getName();
        
setTransient(readMethod.getAnnotation(Transient.class));
    
}

    
/**
     
* Gets the method that should be used to write the property value.
     
*
     
* @return The method that should be used to write the property value.
     
* May return null if the property can't be written.
     
*/

    
public synchronized Method getWriteMethod() {
        
Method writeMethod = this.writeMethodRef.get();
        
if (writeMethod == null) {
            
Class<?> cls = getClass0();
            
if (cls == null || (writeMethodName == null && !this.writeMethodRef.isSet())) {
                
// The write method was explicitly set to null.
                
return null;
            
}

            
// We need the type to fetch the correct method.
            
Class<?> type = getPropertyType0();
            
if (type == null) {
                
try {
                    
// Can't use getPropertyType since it will lead to recursive loop.
                    
type = findPropertyType(getReadMethod(), null);
                    
setPropertyType(type);
                
} catch (IntrospectionException ex) {
                    
// Without the correct property type we can't be guaranteed
                    
// to find the correct method.
                    
return null;
                
}
            
}

            
if (writeMethodName == null) {
                
writeMethodName = Introspector.SET_PREFIX + getBaseName();
            
}

            
Class<?>[] args = (type == null) ? null : new Class<?>[] { type };
            
writeMethod = Introspector.findMethod(cls, writeMethodName, 1, args);
            
if (writeMethod != null) {
                
if (!writeMethod.getReturnType().equals(void.class)) {
                    
writeMethod = null;
                
}
            
}
            
try {
                
setWriteMethod(writeMethod);
            
} catch (IntrospectionException ex) {
                
// fall through
            
}
        
}
        
return writeMethod;
    
}

    
/**
     
* Sets the method that should be used to write the property value.
     
*
     
* @param writeMethod The new write method.
     
* @throws IntrospectionException if the write method is invalid
     
*/

    
public synchronized void setWriteMethod(Method writeMethod)
                                
throws IntrospectionException {
        
this.writeMethodRef.set(writeMethod);
        
if (writeMethod == null) {
            
writeMethodName = null;
            
return;
        
}
        
// Set the property type - which validates the method
        
setPropertyType(findPropertyType(getReadMethod(), writeMethod));
        
setClass0(writeMethod.getDeclaringClass());

        
writeMethodName = writeMethod.getName();
        
setTransient(writeMethod.getAnnotation(Transient.class));
    
}

    
/**
     
* Overridden to ensure that a super class doesn't take precedent
     
*/

    
void setClass0(Class<?> clz) {
        
if (getClass0() != null && clz.isAssignableFrom(getClass0())) {
            
// don't replace a subclass with a superclass
            
return;
        
}
        
super.setClass0(clz);
    
}

    
/**
     
* Updates to "bound" properties will cause a "PropertyChange" event to
     
* get fired when the property is changed.
     
*
     
* @return True if this is a bound property.
     
*/

    
public boolean isBound() {
        
return bound;
    
}

    
/**
     
* Updates to "bound" properties will cause a "PropertyChange" event to
     
* get fired when the property is changed.
     
*
     
* @param bound True if this is a bound property.
     
*/

    
public void setBound(boolean bound) {
        
this.bound = bound;
    
}

    
/**
     
* Attempted updates to "Constrained" properties will cause a "VetoableChange"
     
* event to get fired when the property is changed.
     
*
     
* @return True if this is a constrained property.
     
*/

    
public boolean isConstrained() {
        
return constrained;
    
}

    
/**
     
* Attempted updates to "Constrained" properties will cause a "VetoableChange"
     
* event to get fired when the property is changed.
     
*
     
* @param constrained True if this is a constrained property.
     
*/

    
public void setConstrained(boolean constrained) {
        
this.constrained = constrained;
    
}


    
/**
     
* Normally PropertyEditors will be found using the PropertyEditorManager.
     
* However if for some reason you want to associate a particular
     
* PropertyEditor with a given property, then you can do it with
     
* this method.
     
*
     
* @param propertyEditorClass
  
The Class for the desired PropertyEditor.
     
*/

    
public void setPropertyEditorClass(Class<?> propertyEditorClass) {
        
this.propertyEditorClassRef = getWeakReference(propertyEditorClass);
    
}

    
/**
     
* Gets any explicit PropertyEditor Class that has been registered
     
* for this property.
     
*
     
* @return Any explicit PropertyEditor Class that has been registered
     
*
          
for this property.
  
Normally this will return "null",
     
*
          
indicating that no special editor has been registered,
     
*
          
so the PropertyEditorManager should be used to locate
     
*
          
a suitable PropertyEditor.
     
*/

    
public Class<?> getPropertyEditorClass() {
        
return (this.propertyEditorClassRef != null)
                
? this.propertyEditorClassRef.get()
                
: null;
    
}

    
/**
     
* Constructs an instance of a property editor using the current
     
* property editor class.
     
* <p>
     
* If the property editor class has a public constructor that takes an
     
* Object argument then it will be invoked using the bean parameter
     
* as the argument. Otherwise, the default constructor will be invoked.
     
*
     
* @param bean the source object
     
* @return a property editor instance or null if a property editor has
     
*
         
not been defined or cannot be created
     
* @since 1.5
     
*/

    
public PropertyEditor createPropertyEditor(Object bean) {
        
Object editor = null;

        
final Class<?> cls = getPropertyEditorClass();
        
if (cls != null && PropertyEditor.class.isAssignableFrom(cls)
                
&& ReflectUtil.isPackageAccessible(cls)) {
            
Constructor<?> ctor = null;
            
if (bean != null) {
                
try {
                    
ctor = cls.getConstructor(new Class<?>[] { Object.class });
                
} catch (Exception ex) {
                    
// Fall through
                
}
            
}
            
try {
                
if (ctor == null) {
                    
editor = cls.newInstance();
                
} else {
                    
editor = ctor.newInstance(new Object[] { bean });
                
}
            
} catch (Exception ex) {
                
// Fall through
            
}
        
}
        
return (PropertyEditor)editor;
    
}


    
/**
     
* Compares this <code>PropertyDescriptor</code> against the specified object.
     
* Returns true if the objects are the same. Two <code>PropertyDescriptor</code>s
     
* are the same if the read, write, property types, property editor and
     
* flags
  
are equivalent.
     
*
     
* @since 1.4
     
*/

    
public boolean equals(Object obj) {
        
if (this == obj) {
            
return true;
        
}
        
if (obj != null && obj instanceof PropertyDescriptor) {
            
PropertyDescriptor other = (PropertyDescriptor)obj;
            
Method otherReadMethod = other.getReadMethod();
            
Method otherWriteMethod = other.getWriteMethod();

            
if (!compareMethods(getReadMethod(), otherReadMethod)) {
                
return false;
            
}

            
if (!compareMethods(getWriteMethod(), otherWriteMethod)) {
                
return false;
            
}

            
if (getPropertyType() == other.getPropertyType() &&
                
getPropertyEditorClass() == other.getPropertyEditorClass() &&
                
bound == other.isBound() && constrained == other.isConstrained() &&
                
writeMethodName == other.writeMethodName &&
                
readMethodName == other.readMethodName) {
                
return true;
            
}
        
}
        
return false;
    
}

    
/**
     
* Package private helper method for Descriptor .equals methods.
     
*
     
* @param a first method to compare
     
* @param b second method to compare
     
* @return boolean to indicate that the methods are equivalent
     
*/

    
boolean compareMethods(Method a, Method b) {
        
// Note: perhaps this should be a protected method in FeatureDescriptor
        
if ((a == null) != (b == null)) {
            
return false;
        
}

        
if (a != null && b != null) {
            
if (!a.equals(b)) {
                
return false;
            
}
        
}
        
return true;
    
}

    
/**
     
* Package-private constructor.
     
* Merge two property descriptors.
  
Where they conflict, give the
     
* second argument (y) priority over the first argument (x).
     
*
     
* @param x
  
The first (lower priority) PropertyDescriptor
     
* @param y
  
The second (higher priority) PropertyDescriptor
     
*/

    
PropertyDescriptor(PropertyDescriptor x, PropertyDescriptor y) {
        
super(x,y);

        
if (y.baseName != null) {
            
baseName = y.baseName;
        
} else {
            
baseName = x.baseName;
        
}

        
if (y.readMethodName != null) {
            
readMethodName = y.readMethodName;
        
} else {
            
readMethodName = x.readMethodName;
        
}

        
if (y.writeMethodName != null) {
            
writeMethodName = y.writeMethodName;
        
} else {
            
writeMethodName = x.writeMethodName;
        
}

        
if (y.propertyTypeRef != null) {
            
propertyTypeRef = y.propertyTypeRef;
        
} else {
            
propertyTypeRef = x.propertyTypeRef;
        
}

        
// Figure out the merged read method.
        
Method xr = x.getReadMethod();
        
Method yr = y.getReadMethod();

        
// Normally give priority to y's readMethod.
        
try {
            
if (isAssignable(xr, yr)) {
                
setReadMethod(yr);
            
} else {
                
setReadMethod(xr);
            
}
        
} catch (IntrospectionException ex) {
            
// fall through
        
}

        
// However, if both x and y reference read methods in the same class,
        
// give priority to a boolean "is" method over a boolean "get" method.
        
if (xr != null && yr != null &&
                   
xr.getDeclaringClass() == yr.getDeclaringClass() &&
                   
getReturnType(getClass0(), xr) == boolean.class &&
                   
getReturnType(getClass0(), yr) == boolean.class &&
                   
xr.getName().indexOf(Introspector.IS_PREFIX) == 0 &&
                   
yr.getName().indexOf(Introspector.GET_PREFIX) == 0) {
            
try {
                
setReadMethod(xr);
            
} catch (IntrospectionException ex) {
                
// fall through
            
}
        
}

        
Method xw = x.getWriteMethod();
        
Method yw = y.getWriteMethod();

        
try {
            
if (yw != null) {
                
setWriteMethod(yw);
            
} else {
                
setWriteMethod(xw);
            
}
        
} catch (IntrospectionException ex) {
            
// Fall through
        
}

        
if (y.getPropertyEditorClass() != null) {
            
setPropertyEditorClass(y.getPropertyEditorClass());
        
} else {
            
setPropertyEditorClass(x.getPropertyEditorClass());
        
}


        
bound = x.bound | y.bound;
        
constrained = x.constrained | y.constrained;
    
}

    
/*
     
* Package-private dup constructor.
     
* This must isolate the new object from any changes to the old object.
     
*/

    
PropertyDescriptor(PropertyDescriptor old) {
        
super(old);
        
propertyTypeRef = old.propertyTypeRef;
        
this.readMethodRef.set(old.readMethodRef.get());
        
this.writeMethodRef.set(old.writeMethodRef.get());
        
propertyEditorClassRef = old.propertyEditorClassRef;

        
writeMethodName = old.writeMethodName;
        
readMethodName = old.readMethodName;
        
baseName = old.baseName;

        
bound = old.bound;
        
constrained = old.constrained;
    
}

    
void updateGenericsFor(Class<?> type) {
        
setClass0(type);
        
try {
            
setPropertyType(findPropertyType(this.readMethodRef.get(), this.writeMethodRef.get()));
        
}
        
catch (IntrospectionException exception) {
            
setPropertyType(null);
        
}
    
}

    
/**
     
* Returns the property type that corresponds to the read and write method.
     
* The type precedence is given to the readMethod.
     
*
     
* @return the type of the property descriptor or null if both
     
*
         
read and write methods are null.
     
* @throws IntrospectionException if the read or write method is invalid
     
*/

    
private Class<?> findPropertyType(Method readMethod, Method writeMethod)
        
throws IntrospectionException {
        
Class<?> propertyType = null;
        
try {
            
if (readMethod != null) {
                
Class<?>[] params = getParameterTypes(getClass0(), readMethod);
                
if (params.length != 0) {
                    
throw new IntrospectionException("bad read method arg count: "
                                                     
+ readMethod);
                
}
                
propertyType = getReturnType(getClass0(), readMethod);
                
if (propertyType == Void.TYPE) {
                    
throw new IntrospectionException("read method " +
                                        
readMethod.getName() + " returns void");
                
}
            
}
            
if (writeMethod != null) {
                
Class<?>[] params = getParameterTypes(getClass0(), writeMethod);
                
if (params.length != 1) {
                    
throw new IntrospectionException("bad write method arg count: "
                                                     
+ writeMethod);
                
}
                
if (propertyType != null && !params[0].isAssignableFrom(propertyType)) {
                    
throw new IntrospectionException("type mismatch between read and write methods");
                
}
                
propertyType = params[0];
            
}
        
} catch (IntrospectionException ex) {
            
throw ex;
        
}
        
return propertyType;
    
}


    
/**
     
* Returns a hash code value for the object.
     
* See {@link java.lang.Object#hashCode} for a complete description.
     
*
     
* @return a hash code value for this object.
     
* @since 1.5
     
*/

    
public int hashCode() {
        
int result = 7;

        
result = 37 * result + ((getPropertyType() == null) ? 0 :
                                
getPropertyType().hashCode());
        
result = 37 * result + ((getReadMethod() == null) ? 0 :
                                
getReadMethod().hashCode());
        
result = 37 * result + ((getWriteMethod() == null) ? 0 :
                                
getWriteMethod().hashCode());
        
result = 37 * result + ((getPropertyEditorClass() == null) ? 0 :
                                
getPropertyEditorClass().hashCode());
        
result = 37 * result + ((writeMethodName == null) ? 0 :
                                
writeMethodName.hashCode());
        
result = 37 * result + ((readMethodName == null) ? 0 :
                                
readMethodName.hashCode());
        
result = 37 * result + getName().hashCode();
        
result = 37 * result + ((bound == false) ? 0 : 1);
        
result = 37 * result + ((constrained == false) ? 0 : 1);

        
return result;
    
}

    
// Calculate once since capitalize() is expensive.
    
String getBaseName() {
        
if (baseName == null) {
            
baseName = NameGenerator.capitalize(getName());
        
}
        
return baseName;
    
}

    
void appendTo(StringBuilder sb) {
        
appendTo(sb, "bound", this.bound);
        
appendTo(sb, "constrained", this.constrained);
        
appendTo(sb, "propertyEditorClass", this.propertyEditorClassRef);
        
appendTo(sb, "propertyType", this.propertyTypeRef);
        
appendTo(sb, "readMethod", this.readMethodRef.get());
        
appendTo(sb, "writeMethod", this.writeMethodRef.get());
    
}

    
private boolean isAssignable(Method m1, Method m2) {
        
if (m1 == null) {
            
return true; // choose second method
        
}
        
if (m2 == null) {
            
return false; // choose first method
        
}
        
if (!m1.getName().equals(m2.getName())) {
            
return true; // choose second method by default
        
}
        
Class<?> type1 = m1.getDeclaringClass();
        
Class<?> type2 = m2.getDeclaringClass();
        
if (!type1.isAssignableFrom(type2)) {
            
return false; // choose first method: it declared later
        
}
        
type1 = getReturnType(getClass0(), m1);
        
type2 = getReturnType(getClass0(), m2);
        
if (!type1.isAssignableFrom(type2)) {
            
return false; // choose first method: it overrides return type
        
}
        
Class<?>[] args1 = getParameterTypes(getClass0(), m1);
        
Class<?>[] args2 = getParameterTypes(getClass0(), m2);
        
if (args1.length != args2.length) {
            
return true; // choose second method by default
        
}
        
for (int i = 0; i < args1.length; i++) {
            
if (!args1[i].isAssignableFrom(args2[i])) {
                
return false; // choose first method: it overrides parameter
            
}
        
}
        
return true; // choose second method
    
}
}