1 /*
2 * Copyright (c) 2005, 2015, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
121
122 /**
123 * Returns a <code>TransformService</code> that supports the specified
124 * algorithm URI (ex: {@link Transform#XPATH2}) and mechanism type
125 * (ex: DOM).
126 *
127 * <p>This method uses the standard JCA provider lookup mechanism to
128 * locate and instantiate a <code>TransformService</code> implementation
129 * of the desired algorithm and <code>MechanismType</code> service
130 * attribute. It traverses the list of registered security
131 * <code>Provider</code>s, starting with the most preferred
132 * <code>Provider</code>. A new <code>TransformService</code> object
133 * from the first <code>Provider</code> that supports the specified
134 * algorithm and mechanism type is returned.
135 *
136 * <p> Note that the list of registered providers may be retrieved via
137 * the {@link Security#getProviders() Security.getProviders()} method.
138 *
139 * @implNote
140 * The JDK Reference Implementation additionally uses the
141 * {@code jdk.security.provider.preferred} property to determine
142 * the preferred provider order for the specified algorithm. This
143 * may be different than the order of providers returned by
144 * {@link Security#getProviders() Security.getProviders()}.
145 *
146 * @param algorithm the URI of the algorithm
147 * @param mechanismType the type of the XML processing mechanism and
148 * representation
149 * @return a new <code>TransformService</code>
150 * @throws NullPointerException if <code>algorithm</code> or
151 * <code>mechanismType</code> is <code>null</code>
152 * @throws NoSuchAlgorithmException if no <code>Provider</code> supports a
153 * <code>TransformService</code> implementation for the specified
154 * algorithm and mechanism type
155 * @see Provider
156 */
157 public static TransformService getInstance
158 (String algorithm, String mechanismType)
159 throws NoSuchAlgorithmException {
160 if (mechanismType == null || algorithm == null) {
161 throw new NullPointerException();
|
1 /*
2 * Copyright (c) 2005, 2016, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
121
122 /**
123 * Returns a <code>TransformService</code> that supports the specified
124 * algorithm URI (ex: {@link Transform#XPATH2}) and mechanism type
125 * (ex: DOM).
126 *
127 * <p>This method uses the standard JCA provider lookup mechanism to
128 * locate and instantiate a <code>TransformService</code> implementation
129 * of the desired algorithm and <code>MechanismType</code> service
130 * attribute. It traverses the list of registered security
131 * <code>Provider</code>s, starting with the most preferred
132 * <code>Provider</code>. A new <code>TransformService</code> object
133 * from the first <code>Provider</code> that supports the specified
134 * algorithm and mechanism type is returned.
135 *
136 * <p> Note that the list of registered providers may be retrieved via
137 * the {@link Security#getProviders() Security.getProviders()} method.
138 *
139 * @implNote
140 * The JDK Reference Implementation additionally uses the
141 * {@code jdk.security.provider.preferred}
142 * {@link Security#getProperty(String) Security} property to determine
143 * the preferred provider order for the specified algorithm. This
144 * may be different than the order of providers returned by
145 * {@link Security#getProviders() Security.getProviders()}.
146 *
147 * @param algorithm the URI of the algorithm
148 * @param mechanismType the type of the XML processing mechanism and
149 * representation
150 * @return a new <code>TransformService</code>
151 * @throws NullPointerException if <code>algorithm</code> or
152 * <code>mechanismType</code> is <code>null</code>
153 * @throws NoSuchAlgorithmException if no <code>Provider</code> supports a
154 * <code>TransformService</code> implementation for the specified
155 * algorithm and mechanism type
156 * @see Provider
157 */
158 public static TransformService getInstance
159 (String algorithm, String mechanismType)
160 throws NoSuchAlgorithmException {
161 if (mechanismType == null || algorithm == null) {
162 throw new NullPointerException();
|