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Diffstat (limited to 'bundles/org.eclipse.wst.sse.core/src-encoding/org/eclipse/wst/sse/core/internal/encoding/CommonCharsetNames.java')
| -rw-r--r-- | bundles/org.eclipse.wst.sse.core/src-encoding/org/eclipse/wst/sse/core/internal/encoding/CommonCharsetNames.java | 258 |
1 files changed, 0 insertions, 258 deletions
diff --git a/bundles/org.eclipse.wst.sse.core/src-encoding/org/eclipse/wst/sse/core/internal/encoding/CommonCharsetNames.java b/bundles/org.eclipse.wst.sse.core/src-encoding/org/eclipse/wst/sse/core/internal/encoding/CommonCharsetNames.java deleted file mode 100644 index 10e08f95cc..0000000000 --- a/bundles/org.eclipse.wst.sse.core/src-encoding/org/eclipse/wst/sse/core/internal/encoding/CommonCharsetNames.java +++ /dev/null @@ -1,258 +0,0 @@ -/******************************************************************************* - * Copyright (c) 2001, 2004 IBM 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: - * IBM Corporation - initial API and implementation - * Jens Lukowski/Innoopract - initial renaming/restructuring - * - *******************************************************************************/ -package org.eclipse.wst.sse.core.internal.encoding; - -import java.io.IOException; -import java.io.InputStream; -import java.net.URL; -import java.nio.charset.Charset; -import java.nio.charset.IllegalCharsetNameException; -import java.nio.charset.UnsupportedCharsetException; -import java.util.ArrayList; -import java.util.Hashtable; -import java.util.Properties; -import java.util.PropertyResourceBundle; -import java.util.ResourceBundle; - -import org.eclipse.core.runtime.IPath; -import org.eclipse.core.runtime.Path; -import org.eclipse.core.runtime.Platform; -import org.eclipse.wst.sse.core.internal.encoding.util.Logger; -import org.osgi.framework.Bundle; - -/** - * CommonCharsets is a utility class to provide a central place to map some - * IANA charset name to a Java charset name. In 1.4 JRE's this mostly is a - * thin wrapper of existing Charset functionality. It does, however, allow - * some "overriding" of the built in JRE mappings in the event they are - * necessary. See CodedIO.checkMappingOverrides. - * <p> - * This class also provides some convenient human readable description for the - * charset names which can be used in user interfaces. The description is NL - * aware based on locale. The data is populated via the charset.properties - * file only once, based on static initialization of the hashtables. - * <p> - * The IANA tags are based on reference information found at the - * http://www.iana.org site. Specifically see - * http://www.iana.org/assignments/character-sets - */ -public final class CommonCharsetNames { - - private static Properties defaultIANAmappings = null; - - private static ArrayList encodings = null; - - private static Hashtable supportedEncodingDisplayNames = null; - - /** - * Returns list of commonly available encoding names. Suitable for - * populating a UI dialog or drop down. This list would be a subset of all - * possible charsets the VM supports (which can get into the hundreds). - * For the VM supported charsets, use - * <code>Charset.availableCharsets()</code> - * - * @return String[] - */ - public static String[] getCommonCharsetNames() { - String[] enc = new String[getEncodings().size()]; - getEncodings().toArray(enc); - return enc; - } - - /** - * @return Returns the defaultIANAmappings. - */ - private static Properties getDefaultIANAMappings() { - if (defaultIANAmappings == null) { - defaultIANAmappings = new Properties(); - Bundle keyBundle = Platform.getBundle(ICodedResourcePlugin.ID); - IPath keyPath = new Path("config/defaultIANA.properties"); //$NON-NLS-1$ - URL location = Platform.find(keyBundle, keyPath); - InputStream propertiesInputStream = null; - try { - propertiesInputStream = location.openStream(); - defaultIANAmappings.load(propertiesInputStream); - } - catch (IOException e) { - // if can't read, just assume there's no - // default IANA mappings - // and repeated attempts will not occur, - // since they - // will be represented by an empty - // Properties object - } - } - return defaultIANAmappings; - } - - /** - * Returns display (translated) string for encoding name. If there is no - * "custom" translated version available, it defers to ther VM's Charset - * support. It will return null if no display name is available. - * - * @param String - * charset name - * @return Human friendly display name - */ - public static String getDisplayString(String charsetName) { - if (charsetName == null) - return null; - String result = (String) getSupportedEncodingDisplayNames().get(charsetName); - if (result == null) { - // if we don't have a special one, just return - // what's provided by Charset - - try { - Charset charset = Charset.forName(charsetName); - result = charset.displayName(); - } - catch (UnsupportedCharsetException e) { - // if not supported, the display name is - // the least of clients concerns :) - } - } - return result; - } - - /** - * @return Returns the javaEncodings. - */ - private static ArrayList getEncodings() { - if (encodings == null) { - initHashTables(); - } - return encodings; - } - - public static String getIanaPreferredCharsetName(String charsetName) { - String preferredName = charsetName; - - try { - Charset charset = Charset.forName(charsetName); - if (charset.name() != null) { - preferredName = charset.name(); - } - } - catch (IllegalCharsetNameException e) { - // just return input if illegal - } - catch (UnsupportedCharsetException e) { - // just return input if illegal - } - return preferredName; - } - - /** - * Returns a default IANA name that is listed in CommonCharsetNames. Here - * is how it checks: 1. check to see if charsetName is in the - * CommonCharsetNames list and if so, just return it. 2. check to see if - * charsetName is listed in defaultIANAmappings which contains a mapping - * of more common encodings and the default IANA name they should map to. - * 3. return defaultIanaName if all else fails - */ - public static String getPreferredDefaultIanaName(String charsetName, String defaultIanaName) { - String preferredName = defaultIanaName; - String guessedName = charsetName; - try { - guessedName = CodedIO.getAppropriateJavaCharset(charsetName); - } - catch (IllegalCharsetNameException e) { - // just ignore if illegal - } - catch (UnsupportedCharsetException e) { - // just ignore if illegal - } - if (getEncodings().contains(guessedName)) - preferredName = guessedName; - else { - preferredName = getDefaultIANAMappings().getProperty(guessedName, preferredName); - } - - return preferredName; - } - - /** - * @return - */ - private static Hashtable getSupportedEncodingDisplayNames() { - if (supportedEncodingDisplayNames == null) { - initHashTables(); - } - return supportedEncodingDisplayNames; - } - - private static void initHashTables() { - if (supportedEncodingDisplayNames == null) { - // Initialize hash table for encoding table - supportedEncodingDisplayNames = new Hashtable(); - encodings = new ArrayList(); - - ResourceBundle bundle = null; - InputStream bundleStream = null; - try { - URL bundleURL = Platform.find(Platform.getBundle(ICodedResourcePlugin.ID), Path.fromOSString("$nl$/config/charset.properties")); //$NON-NLS-1$ - if (bundleURL != null) { - bundleStream = bundleURL.openStream(); - bundle = new PropertyResourceBundle(bundleStream); - } - - String totalNumString = bundle.getString("totalnumber");//$NON-NLS-1$ - int totalNum = 0; - if (totalNumString.length() != 0) { - try { - totalNum = Integer.valueOf(totalNumString).intValue(); - } - catch (NumberFormatException e) { - totalNum = 0; - } - } - - for (int i = 0; i < totalNum; i++) { - String iana = bundle.getString("codeset." + i + ".iana");//$NON-NLS-2$//$NON-NLS-1$ - String displayName = bundle.getString("codeset." + i + ".label");//$NON-NLS-2$//$NON-NLS-1$ - - encodings.add(iana); - supportedEncodingDisplayNames.put(iana, displayName); - } - } - catch (IOException e) { - Logger.logException("invalid install or configuration", e); //$NON-NLS-1$ - } - finally { - try { - if (bundleStream != null) - bundleStream.close(); - } - catch (IOException x) { - } - } - } - } - - public static void main(String[] args) { - // unit test only - String test = "Cp1252"; //$NON-NLS-1$ - String result = CommonCharsetNames.getIanaPreferredCharsetName(test); - System.out.println(test + " --> " + result); //$NON-NLS-1$ - - test = "MS932"; //$NON-NLS-1$ - result = CommonCharsetNames.getIanaPreferredCharsetName(test); - System.out.println(test + " --> " + result); //$NON-NLS-1$ - - } - - public CommonCharsetNames() { - super(); - initHashTables(); - } -} |