Java example source code file (InterOperableNamingImpl.java)
The InterOperableNamingImpl.java Java example source code/*
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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* 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,
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*
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package com.sun.corba.se.impl.naming.cosnaming;
import org.omg.CosNaming.NamingContextExtPackage.*;
import java.io.StringWriter;
// Import general CORBA classes
import org.omg.CORBA.SystemException;
import org.omg.CORBA.Object;
// Import org.omg.CosNaming types
import org.omg.CosNaming.NameComponent;
import org.omg.CosNaming.NamingContext;
/**
* Class InteroperableNamingImpl implements the methods defined
* for NamingContextExt which is part of Interoperable Naming
* Service specifications. This class is added for doing more
* of Parsing and Building of Stringified names according to INS
* Spec.
*/
public class InterOperableNamingImpl
{
/**
* Method which stringifies the Name Components given as the input
* parameter.
*
* @param n Array of Name Components (Simple or Compound Names)
* @return string which is the stringified reference.
*/
public String convertToString( org.omg.CosNaming.NameComponent[]
theNameComponents )
{
String theConvertedString =
convertNameComponentToString( theNameComponents[0] );
String temp;
for( int i = 1; i < theNameComponents.length; i++ ) {
temp = convertNameComponentToString( theNameComponents[i] );
if( temp != null ) {
theConvertedString =
theConvertedString + "/" + convertNameComponentToString(
theNameComponents[i] );
}
}
return theConvertedString;
}
/** This method converts a single Namecomponent to String, By adding Escapes
* If neccessary.
*/
private String convertNameComponentToString(
org.omg.CosNaming.NameComponent theNameComponent )
{
if( ( ( theNameComponent.id == null )
||( theNameComponent.id.length() == 0 ) )
&&( ( theNameComponent.kind == null )
||( theNameComponent.kind.length() == 0 ) ) )
{
return ".";
}
else if( ( theNameComponent.id == null )
||( theNameComponent.id.length() == 0 ) )
{
String kind = addEscape( theNameComponent.kind );
return "." + kind;
}
else if( ( theNameComponent.kind == null )
||( theNameComponent.kind.length() == 0 ) )
{
String id = addEscape( theNameComponent.id );
return id;
}
else {
String id = addEscape( theNameComponent.id );
String kind = addEscape( theNameComponent.kind );
return (id + "." + kind);
}
}
/** This method adds escape '\' for the Namecomponent if neccessary
*/
private String addEscape( String value )
{
StringBuffer theNewValue;
if( (value != null) && ( (value.indexOf('.') != -1 ) ||
(value.indexOf('/') != -1)))
{
char c;
theNewValue = new StringBuffer( );
for( int i = 0; i < value.length( ); i++ ) {
c = value.charAt( i );
if( ( c != '.' ) && (c != '/' ) )
{
theNewValue.append( c );
}
else {
// Adding escape for the "."
theNewValue.append( '\\' );
theNewValue.append( c );
}
}
}
else {
return value;
}
return new String( theNewValue );
}
/**
* Method which converts the Stringified name into Array of Name Components.
*
* @param string which is the stringified name.
* @return Array of Name Components (Simple or Compound Names)
*/
public org.omg.CosNaming.NameComponent[] convertToNameComponent(
String theStringifiedName )
throws org.omg.CosNaming.NamingContextPackage.InvalidName
{
String[] theStringifiedNameComponents =
breakStringToNameComponents( theStringifiedName );
if( ( theStringifiedNameComponents == null )
|| (theStringifiedNameComponents.length == 0 ) )
{
return null;
}
NameComponent[] theNameComponents =
new NameComponent[theStringifiedNameComponents.length];
for( int i = 0; i < theStringifiedNameComponents.length; i++ ) {
theNameComponents[i] = createNameComponentFromString(
theStringifiedNameComponents[i] );
}
return theNameComponents;
}
/** Step1 in converting Stringified name into array of Name Component
* is breaking the String into multiple name components
*/
private String[] breakStringToNameComponents( String theStringifiedName ) {
int[] theIndices = new int[100];
int theIndicesIndex = 0;
for(int index = 0; index <= theStringifiedName.length(); ) {
theIndices[theIndicesIndex] = theStringifiedName.indexOf( '/',
index );
if( theIndices[theIndicesIndex] == -1 ) {
// This is the end of all the occurence of '/' and hence come
// out of the loop
index = theStringifiedName.length()+1;
}
else {
// If the '/' is found, first check whether it is
// preceded by escape '\'
// If not then set theIndices and increment theIndicesIndex
// and also set the index else just ignore the '/'
if( (theIndices[theIndicesIndex] > 0 )
&& (theStringifiedName.charAt(
theIndices[theIndicesIndex]-1) == '\\') )
{
index = theIndices[theIndicesIndex] + 1;
theIndices[theIndicesIndex] = -1;
}
else {
index = theIndices[theIndicesIndex] + 1;
theIndicesIndex++;
}
}
}
if( theIndicesIndex == 0 ) {
String[] tempString = new String[1];
tempString[0] = theStringifiedName;
return tempString;
}
if( theIndicesIndex != 0 ) {
theIndicesIndex++;
}
return StringComponentsFromIndices( theIndices, theIndicesIndex,
theStringifiedName );
}
/** This method breaks one big String into multiple substrings based
* on the array of index passed in.
*/
private String[] StringComponentsFromIndices( int[] theIndices,
int indicesCount, String theStringifiedName )
{
String[] theStringComponents = new String[indicesCount];
int firstIndex = 0;
int lastIndex = theIndices[0];
for( int i = 0; i < indicesCount; i++ ) {
theStringComponents[i] = theStringifiedName.substring( firstIndex,
lastIndex );
if( ( theIndices[i] < theStringifiedName.length() - 1 )
&&( theIndices[i] != -1 ) )
{
firstIndex = theIndices[i]+1;
}
else {
firstIndex = 0;
i = indicesCount;
}
if( (i+1 < theIndices.length)
&& (theIndices[i+1] < (theStringifiedName.length() - 1))
&& (theIndices[i+1] != -1) )
{
lastIndex = theIndices[i+1];
}
else {
i = indicesCount;
}
// This is done for the last component
if( firstIndex != 0 && i == indicesCount ) {
theStringComponents[indicesCount-1] =
theStringifiedName.substring( firstIndex );
}
}
return theStringComponents;
}
/** Step 2: After Breaking the Stringified name into set of NameComponent
* Strings, The next step is to create Namecomponents from the substring
* by removing the escapes if there are any.
*/
private NameComponent createNameComponentFromString(
String theStringifiedNameComponent )
throws org.omg.CosNaming.NamingContextPackage.InvalidName
{
String id = null;
String kind = null;
if( ( theStringifiedNameComponent == null )
|| ( theStringifiedNameComponent.length( ) == 0)
|| ( theStringifiedNameComponent.endsWith(".") ) )
{
// If any of the above is true, then we create an invalid Name
// Component to indicate that it is an invalid name.
throw new org.omg.CosNaming.NamingContextPackage.InvalidName( );
}
int index = theStringifiedNameComponent.indexOf( '.', 0 );
// The format could be XYZ (Without kind)
if( index == -1 ) {
id = theStringifiedNameComponent;
}
// The format is .XYZ (Without ID)
else if( index == 0 ) {
// This check is for the Namecomponent which is just "." meaning Id
// and Kinds are null
if( theStringifiedNameComponent.length( ) != 1 ) {
kind = theStringifiedNameComponent.substring(1);
}
}
else
{
if( theStringifiedNameComponent.charAt(index-1) != '\\' ) {
id = theStringifiedNameComponent.substring( 0, index);
kind = theStringifiedNameComponent.substring( index + 1 );
}
else {
boolean kindfound = false;
while( (index < theStringifiedNameComponent.length() )
&&( kindfound != true ) )
{
index = theStringifiedNameComponent.indexOf( '.',index + 1);
if( index > 0 ) {
if( theStringifiedNameComponent.charAt(
index - 1 ) != '\\' )
{
kindfound = true;
}
}
else
{
// No more '.', which means there is no Kind
index = theStringifiedNameComponent.length();
}
}
if( kindfound == true ) {
id = theStringifiedNameComponent.substring( 0, index);
kind = theStringifiedNameComponent.substring(index + 1 );
}
else {
id = theStringifiedNameComponent;
}
}
}
id = cleanEscapeCharacter( id );
kind = cleanEscapeCharacter( kind );
if( id == null ) {
id = "";
}
if( kind == null ) {
kind = "";
}
return new NameComponent( id, kind );
}
/** This method cleans the escapes in the Stringified name and returns the
* correct String
*/
private String cleanEscapeCharacter( String theString )
{
if( ( theString == null ) || (theString.length() == 0 ) ) {
return theString;
}
int index = theString.indexOf( '\\' );
if( index == 0 ) {
return theString;
}
else {
StringBuffer src = new StringBuffer( theString );
StringBuffer dest = new StringBuffer( );
char c;
for( int i = 0; i < theString.length( ); i++ ) {
c = src.charAt( i );
if( c != '\\' ) {
dest.append( c );
} else {
if( i+1 < theString.length() ) {
char d = src.charAt( i + 1 );
// If there is a AlphaNumeric character after a \
// then include slash, as it is not intended as an
// escape character.
if( Character.isLetterOrDigit(d) ) {
dest.append( c );
}
}
}
}
return new String(dest);
}
}
/**
* Method which converts the Stringified name and Host Name Address into
* a URL based Name
*
* @param address which is ip based host name
* @param name which is the stringified name.
* @return url based Name.
*/
public String createURLBasedAddress( String address, String name )
throws InvalidAddress
{
String theurl = null;
if( ( address == null )
||( address.length() == 0 ) ) {
throw new InvalidAddress();
}
else {
theurl = "corbaname:" + address + "#" + encode( name );
}
return theurl;
}
/** Encodes the string according to RFC 2396 IETF spec required by INS.
*/
private String encode( String stringToEncode ) {
StringWriter theStringAfterEscape = new StringWriter();
int byteCount = 0;
for( int i = 0; i < stringToEncode.length(); i++ )
{
char c = stringToEncode.charAt( i ) ;
if( Character.isLetterOrDigit( c ) ) {
theStringAfterEscape.write( c );
}
// Do no Escape for characters in this list
// RFC 2396
else if((c == ';') || (c == '/') || (c == '?')
|| (c == ':') || (c == '@') || (c == '&') || (c == '=')
|| (c == '+') || (c == '$') || (c == ';') || (c == '-')
|| (c == '_') || (c == '.') || (c == '!') || (c == '~')
|| (c == '*') || (c == ' ') || (c == '(') || (c == ')') )
{
theStringAfterEscape.write( c );
}
else {
// Add escape
theStringAfterEscape.write( '%' );
String hexString = Integer.toHexString( (int) c );
theStringAfterEscape.write( hexString );
}
}
return theStringAfterEscape.toString();
}
}
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