gw.util.GosuClassUtil Maven / Gradle / Ivy
/*
* Copyright 2014 Guidewire Software, Inc.
*/
package gw.util;
import java.io.File;
import java.util.Set;
import java.util.HashSet;
/**
* This class is in part derived from org.apache.commons.lang.ClassUtils and is intended
* to break a dependency on that project.
*/
public class GosuClassUtil
{
public static String getNameNoPackage( String className )
{
if( className == null )
{
return null;
}
int packageIndex = className.lastIndexOf( '.' ) + 1;
int innerClassIndex = className.lastIndexOf( '$' ) + 1;
int index = packageIndex >= innerClassIndex
? packageIndex
: innerClassIndex;
return className.substring( index );
}
/**
*/
public static String getPackage( String className )
{
if( className == null || !className.contains(".") )
{
return "";
}
int packageIndex = className.lastIndexOf( '.' );
if (packageIndex < 0) {
return "";
}
return className.substring( 0, packageIndex );
}
public static String getFileExtension( String name )
{
int iIndex = name.lastIndexOf( '.' );
if( iIndex >= 0 )
{
return name.substring( iIndex );
}
return null;
}
public static String getFileExtension( File file )
{
String name = file.getName();
return getFileExtension( name );
}
/**
* Gets the class name minus the package name from a Class.
*
* @param cls the class to get the short name for.
*
* @return the class name without the package name or an empty string
*/
public static String getShortClassName( Class cls )
{
if( cls == null )
{
return "";
}
return getShortClassName( cls.getName() );
}
/**
* Gets the class name minus the package name from a String.
*
* The string passed in is assumed to be a class name - it is not checked.
*
* @param className the className to get the short name for
*
* @return the class name of the class without the package name or an empty string
*/
public static String getShortClassName( String className )
{
if( className == null )
{
return "";
}
if( className.length() == 0 )
{
return "";
}
int lastDotIdx = className.lastIndexOf( "." );
int innerIdx = className.indexOf(
"$", lastDotIdx == -1 ? 0 : lastDotIdx + 1 );
String out = className.substring( lastDotIdx + 1 );
if( innerIdx != -1 )
{
out = out.replace( "$", "." );
}
return out;
}
public static Set getAllInterfaces( Class c )
{
return getAllInterfacesImpl( c, new HashSet() );
}
private static Set getAllInterfacesImpl( Class c, HashSet hashSet )
{
if( c == null || hashSet.contains( c ) )
{
return hashSet;
}
else
{
if( c.isInterface() )
{
hashSet.add( c );
}
getAllInterfacesImpl( c.getSuperclass(), hashSet );
for( Class iface : c.getInterfaces() )
{
getAllInterfacesImpl( iface, hashSet );
}
}
return hashSet;
}
}