org.apache.xmlgraphics.io.TempResourceURIGenerator Maven / Gradle / Ivy
/*
* 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.xmlgraphics.io;
import java.net.URI;
import java.util.concurrent.atomic.AtomicLong;
/**
* Creates a URI for any temporary resource used within XGC.
*/
public final class TempResourceURIGenerator {
public static final String TMP_SCHEME = "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_SCHEME + ":///" + 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_SCHEME.equals(uri.getScheme());
}
}