FontResolver


1   /*
2    * Licensed to the Apache Software Foundation (ASF) under one or more
3    * contributor license agreements.  See the NOTICE file distributed with
4    * this work for additional information regarding copyright ownership.
5    * The ASF licenses this file to You under the Apache License, Version 2.0
6    * (the "License"); you may not use this file except in compliance with
7    * the License.  You may obtain a copy of the License at
8    *
9    *      http://www.apache.org/licenses/LICENSE-2.0
10   *
11   * Unless required by applicable law or agreed to in writing, software
12   * distributed under the License is distributed on an "AS IS" BASIS,
13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14   * See the License for the specific language governing permissions and
15   * limitations under the License.
16   */
17  
18  /* $Id$ */
19  
20  package org.apache.fop.fonts;
21  
22  import javax.xml.transform.Source  ;
23  
24  /**
25   * This interface is used to resolve absolute and relative font URIs.
26   */
27  public interface FontResolver {
28  
29      /**
30       * Called to resolve an URI to a Source instance. The base URI needed by the URIResolver's
31       * resolve() method is defined to be implicitely available in this case. If the URI cannot
32       * be resolved, null is returned and it is assumed that the FontResolver implementation
33       * already warned the user about the problem.
34       * @param href An href attribute, which may be relative or absolute.
35       * @return A Source object, or null if the href could not resolved.
36       */
37      Source   resolve(String   href);
38      
39  }
40

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