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Diffstat (limited to 'gnu/xml/transform/Template.java')
| -rw-r--r-- | gnu/xml/transform/Template.java | 254 |
1 files changed, 254 insertions, 0 deletions
diff --git a/gnu/xml/transform/Template.java b/gnu/xml/transform/Template.java new file mode 100644 index 000000000..6aaa4c1c6 --- /dev/null +++ b/gnu/xml/transform/Template.java @@ -0,0 +1,254 @@ +/* Template.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., 59 Temple Place, Suite 330, Boston, MA +02111-1307 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.transform; + +import java.io.PrintStream; +import javax.xml.namespace.QName; +import javax.xml.transform.TransformerConfigurationException; +import javax.xml.transform.TransformerException; +import javax.xml.xpath.XPathExpressionException; +import org.w3c.dom.Node; +import gnu.xml.xpath.Expr; +import gnu.xml.xpath.NameTest; +import gnu.xml.xpath.NodeTypeTest; +import gnu.xml.xpath.Pattern; +import gnu.xml.xpath.Selector; +import gnu.xml.xpath.Test; + +/** + * A template in an XSL stylesheet. + * + * @author <a href='mailto:dog@gnu.org'>Chris Burdess</a> + */ +class Template + implements Comparable +{ + + static final double DEFAULT_PRIORITY = 0.5d; + + final Stylesheet stylesheet; + final QName name; + final Pattern match; + final TemplateNode node; + final double priority; + final int precedence; + final QName mode; + + Template(Stylesheet stylesheet, + QName name, Pattern match, TemplateNode node, + int precedence, double priority, QName mode) + { + this.stylesheet = stylesheet; + this.name = name; + this.match = match; + this.node = node; + // adjust priority if necessary + // see XSLT section 5.5 + Test test = getNodeTest(match); + if (test != null) + { + if (test instanceof NameTest) + { + NameTest nameTest = (NameTest) test; + if (nameTest.matchesAny() || + nameTest.matchesAnyLocalName()) + { + priority = -0.25d; + } + else + { + priority = 0.0d; + } + } + else + { + NodeTypeTest nodeTypeTest = (NodeTypeTest) test; + if (nodeTypeTest.getNodeType() == + Node.PROCESSING_INSTRUCTION_NODE && + nodeTypeTest.getData() != null) + { + priority = 0.0d; + } + else + { + priority = -0.5d; + } + } + } + this.precedence = precedence; + this.priority = priority; + this.mode = mode; + } + + Template clone(Stylesheet stylesheet) + { + // FIXME by cloning we lose the imports() functionality, so + // apply-imports will be broken. + return new Template(stylesheet, + name, + (match == null) ? null : + (Pattern) match.clone(stylesheet), + (node == null) ? null : node.clone(stylesheet), + precedence, + priority, + mode); + } + + public int compareTo(Object other) + { + if (other instanceof Template) + { + Template t = (Template) other; + int d = t.precedence - precedence; + if (d != 0) + { + return d; + } + double d2 = t.priority - priority; + if (d2 != 0.0d) + { + return (int) Math.round(d2 * 1000.0d); + } + } + return 0; + } + + Test getNodeTest(Expr expr) + { + if (expr instanceof Selector) + { + Selector selector = (Selector) expr; + Test[] tests = selector.getTests(); + if (tests.length > 0) + { + return tests[0]; + } + } + return null; + } + + boolean matches(QName mode, Node node) + { + if ((mode == null && this.mode != null) || + (mode != null && !mode.equals(this.mode))) + { + return false; + } + if (match == null) + { + return false; + } + return match.matches(node); + } + + boolean matches(QName name) + { + return name.equals(this.name); + } + + boolean imports(Template other) + { + for (Stylesheet ctx = other.stylesheet.parent; + ctx != null; + ctx = ctx.parent) + { + if (ctx == stylesheet) + { + return true; + } + } + return false; + } + + /** + * @param stylesheet the stylesheet + * @param parent the parent of result nodes + * @param context the context node in the source document + * @param pos the context position + * @param len the context size + * @param nextSibling if non-null, add result nodes before this node + */ + void apply(Stylesheet stylesheet, QName mode, + Node context, int pos, int len, + Node parent, Node nextSibling) + throws TransformerException + { + //System.err.println("...applying " + toString() + " to " + context); + if (node != null) + { + node.apply(stylesheet, mode, + context, pos, len, + parent, nextSibling); + } + } + + public String toString() + { + StringBuffer buf = new StringBuffer(getClass().getName()); + buf.append('['); + if (name != null) + { + buf.append("name="); + buf.append(name); + } + else if (match != null) + { + buf.append("match="); + buf.append(match); + } + if (mode != null) + { + buf.append(",mode="); + buf.append(mode); + } + buf.append(']'); + return buf.toString(); + + //return (name != null) ? name.toString() : match.toString(); + } + + void list(PrintStream out) + { + out.println(toString()); + if (node != null) + { + node.list(1, out, true); + } + } + +} |