flash.localization.LocalizationManager Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of swfutils Show documentation
The Apache Royale Compiler SWF Utility classes
The newest version!
/*
 *
 *  Licensed to the Apache Software Foundation (ASF) under one or more
 *  contributor license agreements.  See the NOTICE file distributed with
 *  this work for additional information regarding copyright ownership.
 *  The ASF licenses this file to You under the Apache License, Version 2.0
 *  (the "License"); you may not use this file except in compliance with
 *  the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 *
 */

package flash.localization;

import java.util.*;
import java.lang.reflect.Field;
import java.lang.reflect.Modifier;

/**
 * A utility class for looking up localized text.
 */
public class LocalizationManager
{
    private Locale locale = Locale.getDefault();
    private List localizers = new LinkedList();

    public LocalizationManager()
    {
    }

    public void addLocalizer( ILocalizer localizer )
    {
        localizers.add( localizer );
    }

    private ILocalizedText getLocalizedTextInner( Locale locale, String id )
    {
        for (Iterator it = localizers.iterator(); it.hasNext(); )
        {
            ILocalizer localizer = it.next();

            ILocalizedText text = localizer.getLocalizedText( locale, id );

            if (text != null)
            {
                return text;
            }
        }

        return null;
    }

    private ILocalizedText getLocalizedText( Locale locale, String id )
    {
        ILocalizedText t = getLocalizedTextInner( locale, id );

        if ((t == null) && (locale.getCountry().length() > 0) && (locale.getVariant().length() > 0))
        {
            t = getLocalizedTextInner( new Locale( locale.getLanguage(), locale.getCountry() ), id );
        }

        if ((t == null) && (locale.getCountry().length() > 0))
        {
            t = getLocalizedTextInner( new Locale( locale.getLanguage() ), id );
        }

        return t;
    }

    protected static String replaceInlineReferences( String text, Map parameters )
    {
        if (parameters == null)
            return text;

        int depth = 100;
        while (depth-- > 0)
        {
            int o = text.indexOf( "${" );
            if (o == -1)
                break;
            if ((o >= 1) && (text.charAt( o-1 ) == '$'))
            {
                o = text.indexOf( "${", o+2 );
                if (o == -1)
                    break;
            }

            int c = text.indexOf( "}", o );

            if (c == -1)
            {
                return null; // FIXME
            }
            String name = text.substring( o + 2, c );
            String value = null;
            if (parameters.containsKey( name ) && (parameters.get( name ) != null))
            {
                value = parameters.get( name ).toString();
            }

            if (value == null)
            {
                value = "";
            }
            text = text.substring( 0, o ) + value + text.substring( c + 1 );
        }
        return text.replaceAll( "[$][$][{]", "\\${" );
    }

	public String getLocalizedTextString( String id )
	{
		return getLocalizedTextString( id, Collections.EMPTY_MAP );
	}

	public String getLocalizedTextString( String id, Map parameters )
	{
		return getLocalizedTextString(locale, id, parameters );
	}

    public String getLocalizedTextString( Locale locale, String id, Map parameters )
    {
        ILocalizedText t = getLocalizedText( locale, id );

        if ((t == null) && !locale.equals(locale))
        {
            t = getLocalizedText(locale, id );
        }
        if ((t == null) && !locale.getLanguage().equals( "en" ))
        {
            t = getLocalizedText( new Locale( "en" ), id );
        }

        return (t == null)? null : t.format( parameters );
    }

	public String getLocalizedTextString( Object object )
	{
		String s = getLocalizedTextString(locale, object );

        return s;
    }

    // todo - this is a pretty specialized helper function, hoist up to client code?
    public String getLocalizedTextString( Locale locale, Object object )
    {
        String id = object.getClass().getName().replaceAll( "\\$", "." );

        Map parameters = new HashMap();
        Class c = object.getClass();

        while (c != Object.class)
        {
            Field[] fields = c.getDeclaredFields();

            for (int i = 0; i < fields.length; ++i)
            {
                Field f = fields[i];

                if (!Modifier.isPublic( f.getModifiers() ))
                {
                    continue;
                }
                if (Modifier.isStatic( f.getModifiers() ))
                {
                    continue;
                }

                try
                {
                    parameters.put( f.getName(), f.get( object ) );
                }
                catch (Exception e)
                {
                }
            }
            c = c.getSuperclass();
        }

        String s = null;
        if ((parameters.containsKey( "id" ) && parameters.get( "id" ) != null ))
        {
            String subid = parameters.get( "id" ).toString();
            if (subid.length() > 0)
            {
                // fixme - Formalize?
                s = getLocalizedTextString( locale, id + "." + subid, parameters );
            }
        }
        if (s == null)
        {
            s = getLocalizedTextString( locale, id, parameters );
        }

        if (s == null)
        {
            s = id;

            if (parameters != null)
            {
                s += "[";
                for (Iterator> it = parameters.entrySet().iterator(); it.hasNext(); )
                {
                    Map.Entry e = it.next();
                    s += e.getKey();
                    if (e.getValue() != null)
                        s += "='" + e.getValue() + "'";
                    if (it.hasNext())
                        s += ", ";
                }
                s += "]";
            }
            return s;
        }

        return s;
    }

    public Locale getLocale()
    {
    	return this.locale;
    }

    public void setLocale(Locale locale)
    {
        this.locale = locale;
    }
}