| /************************************************************** |
| * |
| * 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 com.sun.star.report.pentaho; |
| |
| import com.sun.star.report.OutputRepository; |
| |
| import java.io.IOException; |
| |
| |
| public class DefaultNameGenerator |
| { |
| |
| private final OutputRepository outputRepository; |
| |
| public DefaultNameGenerator(final OutputRepository outputRepository) |
| { |
| if (outputRepository == null) |
| { |
| throw new NullPointerException(); |
| } |
| this.outputRepository = outputRepository; |
| } |
| |
| public String generateName(final String namePrefix, final String mimeType) |
| throws IOException |
| { |
| return generateName(namePrefix, mimeType, true); |
| } |
| |
| public String generateStorageName(final String namePrefix, final String mimeType) |
| throws IOException |
| { |
| return generateName(namePrefix, mimeType, false); |
| } |
| |
| /** |
| * Generates a new, unique name for storing resources in the output repository. Assuming that proper synchronization |
| * has been applied, the generated name will be unique within that repository. |
| * |
| * @param namePrefix a user defined name for that resource. |
| * @param mimeType the mime type of the resource to be stored in the repository. |
| * @param isStream |
| * @return the generated, fully qualified name. |
| * @throws java.io.IOException |
| */ |
| private String generateName(final String namePrefix, final String mimeType, final boolean isStream) |
| throws IOException |
| { |
| final String name; |
| if (namePrefix != null) |
| { |
| name = namePrefix; |
| } |
| else |
| { |
| name = "file"; |
| } |
| |
| StringBuffer firstFileName = new StringBuffer(); |
| firstFileName.append(name); |
| final String suffix; |
| if (mimeType != null) |
| { |
| suffix = getSuffixForType(mimeType); |
| firstFileName.append('.'); |
| firstFileName.append(suffix); |
| } |
| else |
| { |
| suffix = null; |
| } |
| String newName = firstFileName.toString(); |
| boolean exists; |
| if (isStream) |
| { |
| exists = outputRepository.exists(newName); |
| } |
| else |
| { |
| exists = outputRepository.existsStorage(newName); |
| } |
| if (exists) |
| { |
| int counter = 0; |
| while (exists) |
| { |
| if (counter < 0) // wraparound should not happen.. |
| { |
| throw new IOException(); |
| } |
| firstFileName.delete(0, firstFileName.length()); |
| firstFileName.append(name); |
| firstFileName.append(counter); |
| if (suffix != null) |
| { |
| firstFileName.append('.'); |
| firstFileName.append(suffix); |
| } |
| newName = firstFileName.toString(); |
| if (isStream) |
| { |
| exists = outputRepository.exists(newName); |
| } |
| else |
| { |
| exists = outputRepository.existsStorage(newName); |
| } |
| counter++; |
| } |
| } |
| return newName; |
| } |
| |
| protected String getSuffixForType(final String mimeType) |
| { |
| if ("image/png".equals(mimeType)) |
| { |
| return "png"; |
| } |
| if ("image/jpeg".equals(mimeType)) |
| { |
| return "jpg"; |
| } |
| if ("image/gif".equals(mimeType)) |
| { |
| return "gif"; |
| } |
| |
| // todo ... use a flexible mapping ... |
| return "dat"; |
| } |
| } |