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author | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
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committer | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
commit | 554fd8c5195424bdbcabf5de30fdc183aba391bd (patch) | |
tree | 976dc5ab7fddf506dadce60ae936f43f58787092 /libjava/classpath/gnu/xml/dom/ImplementationSource.java | |
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Diffstat (limited to 'libjava/classpath/gnu/xml/dom/ImplementationSource.java')
-rw-r--r-- | libjava/classpath/gnu/xml/dom/ImplementationSource.java | 167 |
1 files changed, 167 insertions, 0 deletions
diff --git a/libjava/classpath/gnu/xml/dom/ImplementationSource.java b/libjava/classpath/gnu/xml/dom/ImplementationSource.java new file mode 100644 index 000000000..5f404423a --- /dev/null +++ b/libjava/classpath/gnu/xml/dom/ImplementationSource.java @@ -0,0 +1,167 @@ +/* ImplementationSource.java -- + Copyright (C) 2004 Free Software Foundation, Inc.. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ +package gnu.xml.dom; + +import java.util.ArrayList; +import java.util.Arrays; +import java.util.Iterator; +import java.util.List; + +import org.w3c.dom.DOMImplementation; +import org.w3c.dom.DOMImplementationList; +import org.w3c.dom.DOMImplementationSource; + +/** + * Implementation source for GNU JAXP. + * + * @author <a href='mailto:dog@gnu.org'>Chris Burdess</a> + */ +public class ImplementationSource + implements DOMImplementationSource +{ + + private static final String DIGITS = "1234567890"; + + /* + * GNU DOM implementations. + */ + private static final DOMImplementation[] implementations; + + static + { + List acc = new ArrayList(); + acc.add(new gnu.xml.dom.DomImpl()); + try + { + Class t = Class.forName("gnu.xml.libxmlj.dom.GnomeDocumentBuilder"); + acc.add(t.newInstance()); + } + catch (Exception e) + { + // libxmlj not available + } + catch (UnsatisfiedLinkError e) + { + // libxmlj not available + } + implementations = new DOMImplementation[acc.size()]; + acc.toArray(implementations); + } + + public DOMImplementation getDOMImplementation(String features) + { + List available = getImplementations(features); + if (available.isEmpty()) + { + return null; + } + return (DOMImplementation) available.get(0); + } + + public DOMImplementationList getDOMImplementationList(String features) + { + List available = getImplementations(features); + return new ImplementationList(available); + } + + /** + * Returns a list of the implementations that support the specified + * features. + */ + private final List getImplementations(String features) + { + List available = new ArrayList(Arrays.asList(implementations)); + for (Iterator i = parseFeatures(features).iterator(); i.hasNext(); ) + { + String feature = (String) i.next(); + String version = null; + int si = feature.indexOf(' '); + if (si != -1) + { + version = feature.substring(si + 1); + feature = feature.substring(0, si); + } + for (Iterator j = available.iterator(); j.hasNext(); ) + { + DOMImplementation impl = (DOMImplementation) j.next(); + if (!impl.hasFeature(feature, version)) + { + j.remove(); + } + } + } + return available; + } + + /** + * Parses the feature list into feature tokens. + */ + final List parseFeatures(String features) + { + List list = new ArrayList(); + int pos = 0, start = 0; + int len = features.length(); + for (; pos < len; pos++) + { + char c = features.charAt(pos); + if (c == ' ') + { + if (pos + 1 < len && + DIGITS.indexOf(features.charAt(pos + 1)) == -1) + { + list.add(getFeature(features, start, pos)); + start = pos + 1; + } + } + } + if (pos > start) + { + list.add(getFeature(features, start, len)); + } + return list; + } + + final String getFeature(String features, int start, int end) + { + if (features.length() > 0 && features.charAt(start) == '+') + { + return features.substring(start + 1, end); + } + return features.substring(start, end); + } + +} |