mirror of git://gcc.gnu.org/git/gcc.git
103 lines
3.1 KiB
Java
103 lines
3.1 KiB
Java
/* VariableReference.java --
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Copyright (C) 2004 Free Software Foundation, Inc.
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This file is part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 USA.
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library. Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module. An independent module is a module which is not derived from
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or based on this library. If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so. If you do not wish to do so, delete this
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exception statement from your version. */
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package gnu.xml.xpath;
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import gnu.java.lang.CPStringBuilder;
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import javax.xml.namespace.QName;
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import javax.xml.xpath.XPathVariableResolver;
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import org.w3c.dom.Node;
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import gnu.xml.transform.Bindings;
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public class VariableReference
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extends Expr
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{
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final XPathVariableResolver resolver;
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final QName name;
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public VariableReference(XPathVariableResolver resolver, QName name)
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{
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this.resolver = resolver;
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this.name = name;
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}
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public Object evaluate(Node context, int pos, int len)
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{
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if (resolver != null)
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{
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if (resolver instanceof Bindings)
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{
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// Needs context to operate properly
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return ((Bindings) resolver).get(name, context, pos, len);
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}
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return resolver.resolveVariable(name);
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}
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throw new IllegalStateException("no variable resolver");
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}
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public Expr clone(Object context)
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{
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XPathVariableResolver r = resolver;
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if (context instanceof XPathVariableResolver)
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{
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r = (XPathVariableResolver) context;
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}
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return new VariableReference(r, name);
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}
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public boolean references(QName var)
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{
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return name.equals(var);
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}
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public String toString()
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{
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CPStringBuilder buf = new CPStringBuilder("$");
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String prefix = name.getPrefix();
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if (prefix != null && !"".equals(prefix))
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{
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buf.append(prefix);
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buf.append(':');
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}
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buf.append(name.getLocalPart());
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return buf.toString();
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}
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}
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