/*******************************************************************************
* Copyright (c) 2006 Oracle Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Oracle Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.bpel.validator.model;
/**
* Only JDK dependencies here please ...
*/
import java.io.IOException;
import java.net.URL;
import java.util.HashMap;
import java.util.ListResourceBundle;
import java.util.Map;
import java.util.MissingResourceException;
import java.util.PropertyResourceBundle;
import java.util.ResourceBundle;
/**
* Messages loads and caches possibly several resource bundles
* that contain the validator messages.
*
* @author Michal Chmielewski (michal.chmielewski@oracle.com)
* @date Sep 18, 2006
*
*/
@SuppressWarnings("nls")
public class Messages {
static private String DOT = "."; //$NON-NLS-1$
static final Map<String,Messages> BUNDLES = new HashMap<String,Messages> ();
/** The empty resource bundle */
static final ResourceBundle EMPTY_BUNDLE = new ListResourceBundle() {
@Override
protected Object[][] getContents() {
return new Object[][] {
{"empty", "empty"}
};
}
};
String fBundleName;
/** By default assume we have not successfully loaded the bundle */
ResourceBundle fBundle = EMPTY_BUNDLE;
/**
* Temporary for monkey scripts ..
*/
static public void clear () {
synchronized ( BUNDLES ) {
BUNDLES.clear();
}
}
/**
* Return the messages for the bundle name.
*
* @param bundleName
* @return the messages for that bundle name.
*/
static final public Messages getMessages ( String bundleName ) {
Messages msg = BUNDLES.get( bundleName );
if (msg == null) {
msg = new Messages ( bundleName );
synchronized ( BUNDLES ) {
BUNDLES.put( bundleName, msg ) ;
}
}
return msg;
}
static String keyFor ( Class<?> clazz, String name ) {
String pName = clazz.getPackage().getName();
return pName + DOT + name;
}
/**
*
* Get the messages from the specific bundle. We read and cache
* the messages on the first access.
*
* @param bundleName
*
*/
public Messages ( String bundleName ) {
fBundleName = bundleName;
String resourceName = fBundleName.replace('.','/') + ".properties";
URL resourceURL = getClass().getClassLoader().getResource( resourceName );
if (resourceURL == null) {
return ;
}
try {
fBundle = new PropertyResourceBundle ( resourceURL.openStream() );
} catch (IOException ioe) {
ioe.printStackTrace();
}
}
/**
* Return true of the message bundle contains the key
* indicated.
*
* @param key
* @return return true of the message bundle has the key indicated.
*/
public boolean containsKey ( final String key ) {
try {
return fBundle.getString(key) != null;
} catch (MissingResourceException mre) {
return false;
}
}
/**
* Get the message stored under the key.
*
* @param key
* @return the value stored, or some default
*/
public String get ( final String key ) {
return get(key,16);
}
private String get (final String key, final int level) {
String value;
try {
value = fBundle.getString(key).trim();
String newKey = aliasFrom (value);
if (newKey != null) {
if (level > 0) {
return get ( newKey , level-1);
}
return missingKey ( newKey );
}
} catch (MissingResourceException e) {
return missingKey(key);
}
return value;
}
/**
*
* @param key
* @return the missing key format string
*/
static public final String missingKey (String key) {
StringBuilder sb = new StringBuilder(64);
sb.append("!!").append(key).append("! [0={0},1={1},2={2},3={3},4={4},5={5}]");
return sb.toString();
}
/**
* Get the message stored under the key. If not found, then return the default
* value passed.
*
* @param key the key to find in the bundle.
* @param def the default value is the resource is missing in the bundle
* @return the value stored, or some default
*/
public String get ( final String key , String def ) {
return get(key,def,16);
}
String get ( final String key, String def, int level) {
String value;
try {
value = fBundle.getString(key);
String newKey = aliasFrom(value);
if (newKey != null) {
if (level > 0) {
return get(newKey,def,level-1);
}
return def;
}
} catch (MissingResourceException e) {
return def;
}
return value;
}
String aliasFrom ( final String value ) {
int len = value.length();
if (len < 5) {
return null;
}
char ch1 = value.charAt(0);
char ch2 = value.charAt(1);
char chL = value.charAt( len - 1) ;
// ${xxxx}
if (ch1 == '$' && ch2 == '{' && chL == '}') {
return value.substring(2,len-1);
}
return null;
}
}