com.fasterxml.classmate.util.MethodKey Maven / Gradle / Ivy
package com.fasterxml.classmate.util;
import java.io.Serializable;
/**
* Helper class needed when storing methods in maps.
* Immutable.
*/
@SuppressWarnings("serial")
public class MethodKey implements Serializable
{
private static final Class[] NO_CLASSES = new Class[0];
private final String _name;
private final Class[] _argumentTypes;
private final int _hashCode;
public MethodKey(String name)
{
_name = name;
_argumentTypes = NO_CLASSES;
_hashCode = name.hashCode();
}
public MethodKey(String name, Class[] argTypes)
{
_name = name;
_argumentTypes = argTypes;
_hashCode = name.hashCode() + argTypes.length;
}
/*
/**********************************************************************
/* Standard methods
/**********************************************************************
*/
/**
* Equality means name is the same and argument type erasures as well.
*/
@Override public boolean equals(Object o)
{
if (o == this) return true;
if (o == null || o.getClass() != getClass()) return false;
MethodKey other = (MethodKey) o;
Class[] otherArgs = other._argumentTypes;
int len = _argumentTypes.length;
if (otherArgs.length != len) return false;
for (int i = 0; i < len; ++i) {
if (otherArgs[i] != _argumentTypes[i]) return false;
}
return _name.equals(other._name);
}
@Override public int hashCode() { return _hashCode; }
@Override public String toString()
{
StringBuilder sb = new StringBuilder();
sb.append(_name);
sb.append('(');
for (int i = 0, len = _argumentTypes.length; i < len; ++i) {
if (i > 0) sb.append(',');
sb.append(_argumentTypes[i].getName());
}
sb.append(')');
return sb.toString();
}
}