| Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||||||
| NamespacePrefixMapper |
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| 1.6666666666666667;1.667 |
| 1 | /* |
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| 2 | * Copyright 2004 The Apache Software Foundation. |
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| 3 | * |
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| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
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| 5 | * you may not use this file except in compliance with the License. |
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| 6 | * You may obtain a copy of the License at |
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| 7 | * |
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| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
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| 9 | * |
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| 10 | * Unless required by applicable law or agreed to in writing, software |
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| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
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| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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| 13 | * See the License for the specific language governing permissions and |
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| 14 | * limitations under the License. |
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| 15 | */ |
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| 16 | ||
| 17 | ||
| 18 | package org.apache.commons.betwixt.strategy; |
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| 19 | ||
| 20 | import java.util.HashMap; |
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| 21 | ||
| 22 | /** |
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| 23 | * <p>Maps namespace <code>URI</code>'s to prefixes. |
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| 24 | * </p><p> |
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| 25 | * When validating xml documents including namespaces, |
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| 26 | * the issue of prefixes (the short expression before the colon in a universal name) |
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| 27 | * becomes important. |
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| 28 | * DTDs are not namespace aware and so a fixed prefixed must be chosen |
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| 29 | * and used consistently. |
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| 30 | * This class is used to supply consistent, user specified prefixes. |
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| 31 | * </p> |
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| 32 | * @author <a href='http://jakarta.apache.org/'>Apache Commons Team</a> |
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| 33 | * @version $Revision: 155402 $ |
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| 34 | */ |
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| 35 | 9682 | public class NamespacePrefixMapper { |
| 36 | ||
| 37 | 4841 | private int count = 0; |
| 38 | 4841 | private HashMap prefixesByUri = new HashMap(); |
| 39 | ||
| 40 | /** |
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| 41 | * Gets the prefix to be used with the given namespace URI |
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| 42 | * @param namespaceUri |
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| 43 | * @return prefix, not null |
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| 44 | */ |
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| 45 | public String getPrefix(String namespaceUri) { |
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| 46 | 2379 | String prefix = (String) prefixesByUri.get(namespaceUri); |
| 47 | 2379 | if (prefix == null) { |
| 48 | 104 | prefix = generatePrefix(namespaceUri); |
| 49 | 104 | setPrefix(namespaceUri, prefix); |
| 50 | } |
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| 51 | 2379 | return prefix; |
| 52 | } |
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| 53 | ||
| 54 | /** |
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| 55 | * Sets the prefix to be used for the given namespace URI. |
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| 56 | * This method does not check for clashes amongst the namespaces. |
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| 57 | * Possibly it should. |
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| 58 | * @param namespaceUri |
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| 59 | * @param prefix |
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| 60 | */ |
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| 61 | public void setPrefix(String namespaceUri, String prefix) { |
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| 62 | 546 | prefixesByUri.put(namespaceUri, prefix); |
| 63 | 546 | } |
| 64 | ||
| 65 | /** |
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| 66 | * Generates a prefix for the given namespace Uri. |
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| 67 | * Used to assign prefixes for unassigned namespaces. |
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| 68 | * Subclass may wish to override this method to provide more |
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| 69 | * sophisticated implementations. |
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| 70 | * @param namespaceUri URI, not null |
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| 71 | * @return prefix, not null |
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| 72 | */ |
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| 73 | protected String generatePrefix(String namespaceUri) { |
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| 74 | 117 | String prefix = "bt" + ++count; |
| 75 | 117 | if (prefixesByUri.values().contains(prefix)) { |
| 76 | 13 | prefix = generatePrefix(namespaceUri); |
| 77 | } |
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| 78 | 117 | return prefix; |
| 79 | } |
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| 80 | ||
| 81 | } |