diff options
Diffstat (limited to 'libjava/classpath/gnu/xml/transform/AttributeNode.java')
| -rw-r--r-- | libjava/classpath/gnu/xml/transform/AttributeNode.java | 244 |
1 files changed, 244 insertions, 0 deletions
diff --git a/libjava/classpath/gnu/xml/transform/AttributeNode.java b/libjava/classpath/gnu/xml/transform/AttributeNode.java new file mode 100644 index 000000000..4c71f6a92 --- /dev/null +++ b/libjava/classpath/gnu/xml/transform/AttributeNode.java @@ -0,0 +1,244 @@ +/* AttributeNode.java -- + Copyright (C) 2004,2006 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.transform; + +import gnu.java.lang.CPStringBuilder; + +import javax.xml.XMLConstants; +import javax.xml.namespace.QName; +import javax.xml.transform.TransformerException; +import org.w3c.dom.Document; +import org.w3c.dom.DocumentFragment; +import org.w3c.dom.Attr; +import org.w3c.dom.NamedNodeMap; +import org.w3c.dom.Node; +import gnu.xml.xpath.Expr; + +/** + * A template node representing an XSL <code>attribute</code> instruction. + * + * @author <a href='mailto:dog@gnu.org'>Chris Burdess</a> + */ +final class AttributeNode + extends TemplateNode +{ + + final TemplateNode name; + final TemplateNode namespace; + final Node source; + + AttributeNode(TemplateNode name, + TemplateNode namespace, Node source) + { + this.name = name; + this.namespace = namespace; + this.source = source; + } + + TemplateNode clone(Stylesheet stylesheet) + { + TemplateNode ret = new AttributeNode(name.clone(stylesheet), + (namespace == null) ? null : + namespace.clone(stylesheet), + source); + if (children != null) + ret.children = children.clone(stylesheet); + if (next != null) + ret.next = next.clone(stylesheet); + return ret; + } + + void doApply(Stylesheet stylesheet, QName mode, + Node context, int pos, int len, + Node parent, Node nextSibling) + throws TransformerException + { + Document doc = (parent instanceof Document) ? (Document) parent : + parent.getOwnerDocument(); + // Create a document fragment to hold the name + DocumentFragment fragment = doc.createDocumentFragment(); + // Apply name to the fragment + name.apply(stylesheet, mode, + context, pos, len, + fragment, null); + // Use XPath string-value of fragment + String nameValue = Expr.stringValue(fragment); + + String namespaceValue = null; + if (namespace != null) + { + // Create a document fragment to hold the namespace + fragment = doc.createDocumentFragment(); + // Apply namespace to the fragment + namespace.apply(stylesheet, mode, + context, pos, len, + fragment, null); + // Use XPath string-value of fragment + namespaceValue = Expr.stringValue(fragment); + if (namespaceValue.length() == 0) + namespaceValue = null; + } + + String prefix = getPrefix(nameValue); + if (namespaceValue == null) + { + if (prefix != null) + { + if (XMLConstants.XML_NS_PREFIX.equals(prefix)) + namespaceValue = XMLConstants.XML_NS_URI; + else + { + // Resolve namespace for this prefix + namespaceValue = source.lookupNamespaceURI(prefix); + } + } + } + else + { + if (prefix != null) + { + String ns2 = source.lookupNamespaceURI(prefix); + if (ns2 != null && !ns2.equals(namespaceValue)) + { + // prefix clashes, reset it + prefix = null; + int ci = nameValue.indexOf(':'); + nameValue = nameValue.substring(ci + 1); + } + } + } + if (prefix == null) + { + // Resolve prefix for this namespace + prefix = source.lookupPrefix(namespaceValue); + if (prefix != null) + nameValue = prefix + ":" + nameValue; + else + { + if (namespaceValue != null) + { + // Must invent a prefix + prefix = inventPrefix(parent); + nameValue = prefix + ":" + nameValue; + } + } + } + NamedNodeMap attrs = parent.getAttributes(); + boolean insert = true; + if (XMLConstants.XMLNS_ATTRIBUTE_NS_URI.equals(namespaceValue) || + XMLConstants.XMLNS_ATTRIBUTE.equals(nameValue) || + nameValue.startsWith("xmlns:")) + { + // Namespace declaration, do not output + insert = false; + } + if (prefix != null && namespaceValue == null) + { + // Not a QName + insert = false; + } + if (parent.getNodeType() == Node.ELEMENT_NODE && + parent.getFirstChild() != null) + { + // XSLT 7.1.3 Adding an attribute to an element after children have + // been added to it is an error + insert = false; + } + if (insert) + { + // Insert attribute + Attr attr = (namespaceValue != null) ? + doc.createAttributeNS(namespaceValue, nameValue) : + doc.createAttribute(nameValue); + if (attrs != null) + { + if (namespace != null) + attrs.setNamedItemNS(attr); + else + attrs.setNamedItem(attr); + } + if (children != null) + children.apply(stylesheet, mode, + context, pos, len, + attr, null); + } + if (next != null) + next.apply(stylesheet, mode, + context, pos, len, + parent, nextSibling); + } + + final String getPrefix(String name) + { + int ci = name.indexOf(':'); + return (ci == -1) ? null : name.substring(0, ci); + } + + final String inventPrefix(Node parent) + { + String base = "ns"; + int count = 0; + String ret = base + Integer.toString(count); + while (parent.lookupNamespaceURI(ret) != null) + { + count++; + ret = base + Integer.toString(count); + } + return ret; + } + + public boolean references(QName var) + { + if (name != null && name.references(var)) + return true; + if (namespace != null && namespace.references(var)) + return true; + return super.references(var); + } + + public String toString() + { + CPStringBuilder buf = new CPStringBuilder("attribute"); + buf.append('['); + buf.append("name="); + buf.append(name); + buf.append(']'); + return buf.toString(); + } + +} |