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 package org.apache.fontbox.cff;
18
19 import java.util.List;
20
21 /**
22 * A Handler for CharStringCommands.
23 *
24 * @author Villu Ruusmann
25 * @version $Revision$
26 */
27 public abstract class CharStringHandler
28 {
29
30 /**
31 * Handler for a sequence of CharStringCommands.
32 *
33 * @param sequence of CharStringCommands
34 */
35 @SuppressWarnings(value = { "unchecked" })
36 public void handleSequence(List<Object> sequence)
37 {
38 int offset = 0;
39 for (int i = 0; i < sequence.size(); i++)
40 {
41 Object object = sequence.get(i);
42 if (object instanceof CharStringCommand)
43 {
44 List<Integer> numbers = (List) sequence.subList(offset, i);
45 CharStringCommand command = (CharStringCommand) object;
46 handleCommand(numbers, command);
47 offset = i + 1;
48 }
49 }
50 }
51 /**
52 * Handler for CharStringCommands.
53 *
54 * @param numbers a list of numbers
55 * @param command the CharStringCommand
56 */
57 public abstract void handleCommand(List<Integer> numbers, CharStringCommand command);
58 }