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- /*
- * 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());
- }
- }
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