1 /*
2 * Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved.
3 * @LastModified: Sep 2017
4 */
5 /*
6 * Licensed to the Apache Software Foundation (ASF) under one or more
7 * contributor license agreements. See the NOTICE file distributed with
8 * this work for additional information regarding copyright ownership.
9 * The ASF licenses this file to You under the Apache License, Version 2.0
10 * (the "License"); you may not use this file except in compliance with
11 * the License. You may obtain a copy of the License at
12 *
13 * http://www.apache.org/licenses/LICENSE-2.0
14 *
15 * Unless required by applicable law or agreed to in writing, software
16 * distributed under the License is distributed on an "AS IS" BASIS,
17 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
18 * See the License for the specific language governing permissions and
19 * limitations under the License.
20 */
21
22 package com.sun.org.apache.xpath.internal.functions;
23
24 import com.sun.org.apache.xpath.internal.XPathContext;
25 import com.sun.org.apache.xpath.internal.objects.XObject;
26 import com.sun.org.apache.xpath.internal.objects.XString;
27 import com.sun.org.apache.xpath.internal.res.XPATHErrorResources;
28 import java.io.BufferedInputStream;
29 import java.io.InputStream;
30 import java.util.Properties;
31 import jdk.xml.internal.SecuritySupport;
32
33 /**
34 * Execute the SystemProperty() function.
35 * @xsl.usage advanced
36 */
37 public class FuncSystemProperty extends FunctionOneArg
38 {
39 static final long serialVersionUID = 3694874980992204867L;
40 /**
41 * The path/filename of the property file: XSLTInfo.properties
42 * Maintenance note: see also
43 * com.sun.org.apache.xalan.internal.processor.TransformerFactoryImpl.XSLT_PROPERTIES
44 */
45 static final String XSLT_PROPERTIES =
46 "com/sun/org/apache/xalan/internal/res/XSLTInfo.properties";
47
48 /**
49 * Execute the function. The function must return
50 * a valid object.
51 * @param xctxt The current execution context.
52 * @return A valid XObject.
53 *
54 * @throws javax.xml.transform.TransformerException
55 */
56 public XObject execute(XPathContext xctxt) throws javax.xml.transform.TransformerException
57 {
58
59 String fullName = m_arg0.execute(xctxt).str();
60 int indexOfNSSep = fullName.indexOf(':');
61 String result;
62 String propName = "";
63
64 // List of properties where the name of the
65 // property argument is to be looked for.
66 Properties xsltInfo = new Properties();
67
68 loadPropertyFile(xsltInfo);
69
70 if (indexOfNSSep > 0)
71 {
72 String prefix = (indexOfNSSep >= 0)
73 ? fullName.substring(0, indexOfNSSep) : "";
74 String namespace;
75
76 namespace = xctxt.getNamespaceContext().getNamespaceForPrefix(prefix);
77 propName = (indexOfNSSep < 0)
78 ? fullName : fullName.substring(indexOfNSSep + 1);
79
80 if (namespace.startsWith("http://www.w3.org/XSL/Transform")
81 || namespace.equals("http://www.w3.org/1999/XSL/Transform"))
82 {
83 result = xsltInfo.getProperty(propName);
84
85 if (null == result)
86 {
87 warn(xctxt, XPATHErrorResources.WG_PROPERTY_NOT_SUPPORTED,
88 new Object[]{ fullName }); //"XSL Property not supported: "+fullName);
89
90 return XString.EMPTYSTRING;
91 }
92 }
93 else
94 {
95 warn(xctxt, XPATHErrorResources.WG_DONT_DO_ANYTHING_WITH_NS,
96 new Object[]{ namespace,
97 fullName }); //"Don't currently do anything with namespace "+namespace+" in property: "+fullName);
98
99 try
100 {
101 result = SecuritySupport.getSystemProperty(propName);
102
103 if (null == result)
104 {
105
106 // result = System.getenv(propName);
107 return XString.EMPTYSTRING;
108 }
109 }
110 catch (SecurityException se)
111 {
112 warn(xctxt, XPATHErrorResources.WG_SECURITY_EXCEPTION,
113 new Object[]{ fullName }); //"SecurityException when trying to access XSL system property: "+fullName);
114
115 return XString.EMPTYSTRING;
116 }
117 }
118 }
119 else
120 {
121 try
122 {
123 result = SecuritySupport.getSystemProperty(fullName);
124
125 if (null == result)
126 {
127
128 // result = System.getenv(fullName);
129 return XString.EMPTYSTRING;
130 }
131 }
132 catch (SecurityException se)
133 {
134 warn(xctxt, XPATHErrorResources.WG_SECURITY_EXCEPTION,
135 new Object[]{ fullName }); //"SecurityException when trying to access XSL system property: "+fullName);
136
137 return XString.EMPTYSTRING;
138 }
139 }
140
141 if (propName.equals("version") && result.length() > 0)
142 {
143 try
144 {
145 // Needs to return the version number of the spec we conform to.
146 return new XString("1.0");
147 }
148 catch (Exception ex)
149 {
150 return new XString(result);
151 }
152 }
153 else
154 return new XString(result);
155 }
156
157 /**
158 * Retrieve a property bundle from XSLT_PROPERTIES
159 *
160 * @param target The target property bag the file will be placed into.
161 */
162 private void loadPropertyFile(Properties target)
163 {
164 try
165 {
166 // Use SecuritySupport class to provide privileged access to property file
167 InputStream is = SecuritySupport.getResourceAsStream(XSLT_PROPERTIES);
168
169 // get a buffered version
170 try (BufferedInputStream bis = new BufferedInputStream(is)) {
171 target.load(bis); // and load up the property bag from this
172 }
173 }
174 catch (Exception ex)
175 {
176 // ex.printStackTrace();
177 throw new com.sun.org.apache.xml.internal.utils.WrappedRuntimeException(ex);
178 }
179 }
180 }