org.trancecode.xml.saxon.SaxonNamespaces.java Source code

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Here is the source code for org.trancecode.xml.saxon.SaxonNamespaces.java

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/*
 * Copyright (C) 2010 Herve Quiroz
 *
 * This library is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Lesser General Public License as published by the Free
 * Software Foundation; either version 2.1 of the License, or (at your option)
 * any later version.
 * 
 * This library 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 Lesser General Public License for more
 * details.
 * 
 * You should have received a copy of the GNU Lesser General Public License
 * along with this library; if not, write to the Free Software Foundation, Inc.,
 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 
 */
package org.trancecode.xml.saxon;

import com.google.common.base.Function;
import com.google.common.collect.Iterables;
import com.google.common.collect.Maps;

import java.util.Iterator;
import java.util.Map;
import java.util.Map.Entry;

import net.sf.saxon.om.InscopeNamespaceResolver;
import net.sf.saxon.s9api.XdmNode;
import org.trancecode.collection.TcMaps;

/**
 * Utility methods realted to namespaces for Saxon.
 * 
 * @author Herve Quiroz
 */
public final class SaxonNamespaces {
    public static Iterable<String> prefixes(final XdmNode node) {
        return () -> {
            final InscopeNamespaceResolver namespaceResolver = new InscopeNamespaceResolver(
                    node.getUnderlyingNode());
            @SuppressWarnings("unchecked")
            final Iterator<String> prefixes = namespaceResolver.iteratePrefixes();
            return prefixes;
        };
    }

    public static Iterable<Entry<String, String>> namespaceSequence(final XdmNode node) {
        final InscopeNamespaceResolver namespaceResolver = new InscopeNamespaceResolver(node.getUnderlyingNode());
        return Iterables.transform(prefixes(node),
                prefix -> Maps.immutableEntry(prefix, namespaceResolver.getURIForPrefix(prefix, true)));
    }

    public static Map<String, String> namespaceMap(final XdmNode node) {
        return TcMaps.fromEntries(namespaceSequence(node));
    }

    private SaxonNamespaces() {
        // No instantiation
    }
}