001    /*******************************************************************************
002     * Copyright (C) PicoContainer Organization. All rights reserved.
003     * ---------------------------------------------------------------------------
004     * The software in this package is published under the terms of the BSD style
005     * license a copy of which has been included with this distribution in the
006     * LICENSE.txt file.
007     ******************************************************************************/
008    package org.picocontainer.script;
009    
010    import org.picocontainer.PicoException;
011    
012    /**
013     * Thrown when a given script type extension has no corresponding builder. The
014     * message will also indicate all supported builders.
015     * 
016     * @author Michael Rimov
017     */
018    @SuppressWarnings("serial")
019    public class UnsupportedScriptTypeException extends PicoException {
020    
021        private final String specifiedFileExtension;
022    
023        private final String[] allSupportedFileExtensions;
024    
025        public UnsupportedScriptTypeException(String specifiedFileExtension, String[] allSupportedFileExtensions) {
026            super();
027            this.specifiedFileExtension = specifiedFileExtension;
028            this.allSupportedFileExtensions = allSupportedFileExtensions;
029        }
030    
031        /**
032         * Builds the exception message from the fields
033         * 
034         * @return The exception message
035         */
036        private String buildExceptionMessage() {
037            StringBuffer message = new StringBuffer(48);
038            message.append("Unsupported file extension '");
039            message.append(specifiedFileExtension);
040            message.append("'.  Supported extensions are: [");
041    
042            if (allSupportedFileExtensions != null) {
043                boolean needPipe = false;
044                for (String allSupportedFileExtension : allSupportedFileExtensions) {
045                    if (needPipe) {
046                        message.append("|");
047                    } else {
048                        needPipe = true;
049                    }
050    
051                    message.append(allSupportedFileExtension);
052                }
053    
054                message.append("].");
055            } else {
056                message.append(" null ");
057            }
058    
059            return message.toString();
060        }
061    
062        @Override
063        public String getMessage() {
064            return buildExceptionMessage();
065        }
066    
067        public String[] getSystemSupportedExtensions() {
068            return allSupportedFileExtensions;
069        }
070    
071        public String getRequestedExtension() {
072            return specifiedFileExtension;
073        }
074    
075    }