| /* |
| * 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 org.apache.fop.apps.io; |
| |
| import java.net.URI; |
| import java.util.concurrent.atomic.AtomicLong; |
| |
| /** |
| * Creates a URI for any temporary resource used within FOP. |
| */ |
| public final class TempResourceURIGenerator { |
| |
| public static final String TMP_SCHEMA = "tmp"; |
| |
| private final String tempURIPrefix; |
| |
| private final AtomicLong counter; |
| |
| /** |
| * @param uriPrefix a prefix used to name the unique URI |
| */ |
| public TempResourceURIGenerator(String uriPrefix) { |
| counter = new AtomicLong(); |
| tempURIPrefix = URI.create(TMP_SCHEMA + ":///" + uriPrefix).toASCIIString(); |
| } |
| |
| /** |
| * Generate a unique URI for a temporary resource |
| * @return the URI |
| */ |
| public URI generate() { |
| return URI.create(tempURIPrefix + getUniqueId()); |
| } |
| |
| private String getUniqueId() { |
| return Long.toHexString(counter.getAndIncrement()); |
| } |
| |
| public static boolean isTempUri(URI uri) { |
| return TMP_SCHEMA.equals(uri.getScheme()); |
| } |
| } |