org.metawidget.util.simple.PathUtils Maven / Gradle / Ivy
// Metawidget (licensed under LGPL)
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
//
// This library 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
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
package org.metawidget.util.simple;
/**
* Utilities for working with type/name-formatted Strings
*
* @author Richard Kennard
*/
public class PathUtils {
//
// Public statics
//
public static TypeAndNames parsePath( String path ) {
return new TypeAndNames( path, StringUtils.SEPARATOR_FORWARD_SLASH_CHAR );
}
public static TypeAndNames parsePath( String path, char separator ) {
return new TypeAndNames( path, separator );
}
/**
* Tuple for returning a type and an array of names.
*
* Uses lazy initialization to save on regex calls.
*/
public static class TypeAndNames {
//
// Private methods
//
private String mPath;
private char mSeparator;
private String mParsedType;
private String mParsedNames;
private String[] mParsedNamesAsArray;
//
// Constructor
//
public TypeAndNames( String path, char separator ) {
mPath = path.trim();
mSeparator = separator;
}
//
// Public methods
//
public String getType() {
if ( mParsedType == null ) {
int indexOfTypeEnd = mPath.indexOf( mSeparator );
// Just type?
if ( indexOfTypeEnd == -1 ) {
mParsedType = mPath;
mParsedNames = "";
} else {
mParsedType = mPath.substring( 0, indexOfTypeEnd );
// Ends in separator?
if ( indexOfTypeEnd == mPath.length() - 1 ) {
mParsedNames = "";
} else {
mParsedNames = mPath.substring( indexOfTypeEnd + 1 );
}
}
}
return mParsedType;
}
public String getNames() {
if ( mParsedNames == null ) {
getType();
}
return mParsedNames;
}
public String[] getNamesAsArray() {
if ( mParsedNamesAsArray == null ) {
String names = getNames();
if ( "".equals( names ) ) {
mParsedNamesAsArray = EMPTY_STRING_ARRAY;
} else {
mParsedNamesAsArray = getNames().split( "\\" + mSeparator );
}
}
return mParsedNamesAsArray;
}
}
//
// Private statics
//
static final String[] EMPTY_STRING_ARRAY = new String[0];
//
// Private constructor
//
private PathUtils() {
// Can never be called
}
}