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The Open Source version of the IBM Toolbox for Java
///////////////////////////////////////////////////////////////////////////////
//
// JTOpen (IBM Toolbox for Java - OSS version)
//
// Filename: ResourceLoader.java
//
// The source code contained herein is licensed under the IBM Public License
// Version 1.0, which has been approved by the Open Source Initiative.
// Copyright (C) 1997-2000 International Business Machines Corporation and
// others. All rights reserved.
//
///////////////////////////////////////////////////////////////////////////////
package com.ibm.as400.vaccess;
import com.ibm.as400.access.Trace;
import javax.swing.Icon;
import javax.swing.ImageIcon;
import java.io.File;
import java.net.URL;
import java.util.MissingResourceException;
import java.util.ResourceBundle;
/**
The ResourceLoader class is used to load the MRI resources.
**/
class ResourceLoader
{
private static final String copyright = "Copyright (C) 1997-2000 International Business Machines Corporation and others.";
// Debug flag. This can be helpful in debugging
// ExceptionInInitializerError exceptions, which are ususally
// caused by a resource not being found. Set this to
// true and recompile.
private static final boolean DEBUG_ = false;
// Private data.
private static String genericDescription_ = null;
private static ResourceBundle resources_ = null;
private static ResourceBundle printResources_ = null;
private static ResourceBundle queryResources_ = null;
/**
Returns an icon.
@param fileName The icon file name.
@return The icon.
**/
static final Icon getIcon (String fileName)
{
return getIcon (fileName, null);
}
/**
Returns an icon.
@param fileName The icon file name.
@param description The icon description.
@return The icon.
**/
static final Icon getIcon (String fileName, String description)
{
Icon icon = null;
if (DEBUG_)
System.out.println ("ResourceLoader: Loading icon " + fileName + ".");
try {
// The generic description is for loading icons. Aparantly, the
// description is used in cases like presenting an icon to blind
// users, etc. In some cases, we just don't have a description,
// so we will put up a canned description.
if (description == null) {
if (genericDescription_ == null)
genericDescription_ = getText ("PRODUCT_TITLE");
description = genericDescription_;
}
URL url = ResourceLoader.class.getResource (fileName);
if (url == null)
{
fileName = "com" + File.separator + "ibm" + File.separator +
"as400" + File.separator + "vaccess" + File.separator +
fileName;
icon = new ImageIcon (fileName, description);
}
else
{
icon = new ImageIcon (url, description);
}
}
catch (Exception e) {
if (DEBUG_)
System.out.println ("ResourceLoader: Error: " + e + ".");
Trace.log (Trace.ERROR, "Icon " + fileName + " not loaded: " + e.getMessage() + ".");
}
return icon;
}
/**
Returns a resource string.
@param key The key in the MRI resource bundle.
@return The translatable text.
**/
static final String getPrintText (String key)
{
if (DEBUG_)
System.out.println ("ResourceLoader: Loading text " + key + ".");
try {
// Load the resource bundle the first time.
if (printResources_ == null)
printResources_ = ResourceBundle.getBundle ("com.ibm.as400.vaccess.VNPMRI");
// Load the resource.
return printResources_.getString (key);
}
catch (MissingResourceException e) {
if (DEBUG_)
System.out.println ("ResourceLoader: Error: " + e + ".");
Trace.log (Trace.ERROR, "Error while loading print MRI resource: " + key + ".");
throw e;
}
}
/**
Returns a resource string from the VQRYMRI properties file.
@param key The key in the MRI resource bundle.
@return The translatable text.
**/
static final String getQueryText (String key)
{
if (DEBUG_)
System.out.println ("ResourceLoader: Loading text " + key + ".");
try {
// Load the resource bundle the first time.
if (queryResources_ == null)
queryResources_ = ResourceBundle.getBundle ("com.ibm.as400.vaccess.VQRYMRI");
// Load the resource.
return queryResources_.getString (key);
}
catch (MissingResourceException e) {
if (DEBUG_)
System.out.println ("ResourceLoader: Error: " + e + ".");
Trace.log (Trace.ERROR, "Error while loading query MRI resource: " + key + ".");
throw e;
}
}
/**
Returns a resource string.
@param key The key in the MRI resource bundle.
@return The translatable text.
**/
static final String getText (String key)
{
if (DEBUG_)
System.out.println ("ResourceLoader: Loading text " + key + ".");
try {
// Load the resource bundle the first time.
if (resources_ == null)
resources_ = ResourceBundle.getBundle ("com.ibm.as400.vaccess.VMRI");
// Load the resource.
return resources_.getString (key);
}
catch (MissingResourceException e) {
if (DEBUG_)
System.out.println ("ResourceLoader: Error: " + e + ".");
Trace.log (Trace.ERROR, "Error while loading MRI resource: " + key + ".");
throw e;
}
}
// @A1A
/**
Replaces a single substitution variable in a string.
@param text The text string, with a single substitution variable
(e.g. "Error &0 has occurred.");
@param value The replacement value.
@return The text string with the substitution variable
replaced.
**/
static String substitute (String text, String value)
{
return substitute (text, new String[] { value });
}
// @A1A
/**
Replaces substitution variables in a string.
@param text The text string, with substitution variables
(e.g. "Error &0 in table &1.");
@param values The replacement values.
@return The text string with all substitution variables
replaced.
**/
static String substitute (String text, String[] values)
{
String result = text;
for (int i = 0; i < values.length; ++i) {
String variable = "&" + i;
int j = result.indexOf (variable);
if (j >= 0) {
StringBuffer buffer = new StringBuffer ();
buffer.append (result.substring (0, j));
buffer.append (values[i]);
buffer.append (result.substring (j + variable.length ()));
result = buffer.toString ();
}
}
return result;
}
}