servlethelper.java

CRM源码This file describes some issues that should be implemented in future and how it should be imple

    public static long getParamAsLong( HttpServletRequest request, String paramName )
    throws IncorrectParameterException {
        String value = getParamAsString( request, paramName, false );
        try {
            return Long.parseLong( value );
        } catch( NumberFormatException nfe ) {
            throw new IncorrectParameterException( paramName, value );
        }
    }
    
    /**
     * Gets all values of the given parameter from HTTP request as long array.
     *
     * @param request HTTP request
     * @param paramName parameter name
     * @return parameter values
     * @throws IncorrectParameterException
     */
    public static long[] getAllParamValuesAsLong( HttpServletRequest request, String paramName )
    throws IncorrectParameterException {
        String[] paramValues = getAllParamValuesAsString( request, paramName );
        long[] values = new long[paramValues.length];
        for( int i = 0; i < paramValues.length; i++ ) {
            try {
                values[i] = Long.parseLong( paramValues[i] );
            } catch( NumberFormatException nfe ) {
                throw new IncorrectParameterException( paramName, paramValues[i] );
            }
        }
        return values;
    }
    
    /**
     * Gets the parameter value from HTTP request as integer.
     *
     * @param request HTTP request
     * @param paramName parameter name
     * @return parameter value
     * @throws IncorrectParameterException
     */
    public static int getParamAsInt( HttpServletRequest request, String paramName )
    throws IncorrectParameterException {
        String value = getParamAsString( request, paramName, false );
        try {
            return Integer.parseInt( value );
        } catch( NumberFormatException nfe ) {
            throw new IncorrectParameterException( paramName, value );
        }
    }
    
    /**
     * Gets the parameter value from HTTP request as boolean.
     *
     * @param request HTTP request
     * @param paramName parameter name
     * @return parameter value
     * @throws IncorrectParameterException
     */
    public static boolean getParamAsBoolean( HttpServletRequest request, String paramName )
    throws IncorrectParameterException {
        
        String value = getParamAsString( request, paramName, false );
        return( value == null ) ? false : ( value.equalsIgnoreCase( "1" ) || value.equalsIgnoreCase( "true" ) );
    }

    public static String getInitParamAsString(ServletConfig config, String paramName)
            throws IncorrectParameterException {
    
        String paramValue = config.getInitParameter(paramName);
        if(paramValue == null)
            throw new IncorrectParameterException(paramName);
        
        return paramValue;
    }
    
    public static long getInitParamAsLong(ServletConfig config, String paramName)
            throws IncorrectParameterException {
    
        String paramValue = config.getInitParameter(paramName);
        if(paramValue == null)
            throw new IncorrectParameterException(paramName);
        
        return Long.parseLong(paramValue);
    }
    
    public static int getInitParamAsInt(ServletConfig config, String paramName)
            throws IncorrectParameterException {
    
        return Integer.parseInt(getInitParamAsString(config, paramName));
    }

    /**
     * Gets compound record ID.
     *
     * @param req HTTP request
     * @return CompoundKey object
     * @throws ServletException
     */
    public static CompoundKey getCompoundRecordId( HttpServletRequest req )
    throws ServletException {
        
        CompoundKey compoundPkey = new CompoundKey();
        compoundPkey.addKey( getParamAsString( req, "recordId", true ) );
        
        String recordId2 = getParamAsString( req, "recordId2", false );
        if( !StringHelper.isEmpty( recordId2 ) ) {
            compoundPkey.addKey( recordId2 );
        }
        String recordId3 = getParamAsString( req, "recordId3", false );
        if( !StringHelper.isEmpty( recordId3 ) ) {
            compoundPkey.addKey( recordId3 );
        }
        String recordId4 = getParamAsString( req, "recordId4", false );
        if( !StringHelper.isEmpty( recordId4 ) ) {
            compoundPkey.addKey( recordId4 );
        }
        
        return compoundPkey;
        
    }
    
    /**
     * Gets EJB reference.
     *
     * @param ctx ServletContext
     * @param jndiName JNDI name
     * @param homeClass home class
     * @return remote object
     */
    public static Object getRemoteObject( ServletContext ctx, String jndiName, Class homeClass ) {
        return getCacheObjectManager( ctx ).getRemoteObject( jndiName, homeClass );
    }
    
    /**
     * Gets EJB local reference.
     *
     * @param ctx ServletContext
     * @param jndiName JNDI name
     * @param homeClass home class
     * @return local object
     */
    public static Object getLocalObject( ServletContext ctx, String jndiName, Class homeClass ) {
        return getCacheObjectManager( ctx ).getLocalObject( jndiName, homeClass );
    }
    
    /**
     * Gets EJB remote home object.
     *
     * @param ctx ServletContext
     * @param jndiName JNDI name
     * @param homeClass home class
     * @return remote home object
     */
    public static Object getRemoteHome( ServletContext ctx, String jndiName, Class homeClass ) {
        return getCacheObjectManager( ctx ).getRemoteHome( jndiName, homeClass );
    }
    
    /**
     * Gets EJB local home interface.
     *
     * @param ctx ServletContext
     * @param jndiName JNDI name
     * @param homeClass home class
     * @return local home object
     */
    public static Object getLocalHome( ServletContext ctx, String jndiName, Class homeClass ) {
        return getCacheObjectManager( ctx ).getLocalHome( jndiName, homeClass );
    }
    
    /**
     * Gets Cache manager EJB reference.
     *
     * @param ctx ServletContext
     * @return CacheObjectManager object
     */
    private static CacheObjectManager getCacheObjectManager( ServletContext ctx ) {
        CacheObjectManager com = null;
        if( ( com = ( CacheObjectManager ) ctx.getAttribute( ATTR_CACHE_OBJECT ) ) == null ) {
            synchronized( ctx ) {
                if( ( com = ( CacheObjectManager ) ctx.getAttribute( ATTR_CACHE_OBJECT ) ) == null ) {
                    com = new CacheObjectManager();
                    ctx.setAttribute( ATTR_CACHE_OBJECT, com );
                }
            }
        }
        return com;
    }
    
    public static String getPopupMenuCaption(ServletContext ctx, String langID, String captionID) {
        String key = langID + captionID;
        String strCaption = popupMenuCaptions.getProperty(key);
        if (strCaption == null) {
            CaptionManagerLocal cm = ( CaptionManagerLocal )
            getLocalObject( ctx, JNDINames.CaptionManager, CaptionManagerLocalHome.class );
            
            strCaption = cm.getPopupMenuCaption( langID, captionID );
            popupMenuCaptions.setProperty(key, strCaption);
        }
        return strCaption;
    }
    
    public static String getServerMessage(ServletContext ctx, String langID, String captionID) {
        String key = langID + captionID;
        String strCaption = serverMessages.getProperty(key);
        if (strCaption == null) {
            CaptionManagerLocal cm = ( CaptionManagerLocal )
            getLocalObject( ctx, JNDINames.CaptionManager, CaptionManagerLocalHome.class );
            
            strCaption = cm.getServerMessage( langID, captionID );
            serverMessages.setProperty(key, strCaption);
        }
        return strCaption;
    }
    
    public static String getFocusCaption(ServletContext ctx, String langID, String captionID) {
        String key = langID + captionID;
        String strCaption = focusCaptions.getProperty(key);
        if (strCaption == null) {
            CaptionManagerLocal cm = ( CaptionManagerLocal )
            getLocalObject( ctx, JNDINames.CaptionManager, CaptionManagerLocalHome.class );
            
            strCaption = cm.getServerMessage( langID, captionID );
            focusCaptions.setProperty(key, strCaption);
        }
        return strCaption;
    }
}