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////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// Copyright (c) 2018-2022 Saxonica Limited
// This Source Code Form is subject to the terms of the Mozilla Public License, v. 2.0.
// If a copy of the MPL was not distributed with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
// This Source Code Form is "Incompatible With Secondary Licenses", as defined by the Mozilla Public License, v. 2.0.
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
package net.sf.saxon.dom;
import net.sf.saxon.type.BuiltInAtomicType;
import net.sf.saxon.type.SchemaType;
import net.sf.saxon.type.Type;
import org.w3c.dom.*;
import java.util.ArrayList;
import java.util.List;
/**
* This class is an implementation of the DOM Attr class that wraps a Saxon NodeInfo
* representation of an attribute or namespace node.
*/
public class AttrOverNodeInfo extends NodeOverNodeInfo implements Attr {
/**
* Get the name of an attribute node (the lexical QName) (DOM method)
*/
@Override
public String getName() {
if (node.getNodeKind() == Type.NAMESPACE) {
String local = node.getLocalPart();
if (local.equals("")) {
return "xmlns";
} else {
return "xmlns:" + local;
}
}
return node.getDisplayName();
}
/**
* Return the character value of an attribute node (DOM method)
*
* @return the attribute value
*/
@Override
public String getValue() {
return node.getStringValue();
}
/**
* Determine whether the node has any children.
*
* @return true: a DOM Attribute has a text node as a child.
*/
@Override
public boolean hasChildNodes() {
return true;
}
/**
* Get first child
*
* @return the first child node of this node. In this model an attribute node always has a single text
* node as its child.
*/
@Override
public Node getFirstChild() {
return new TextOverAttrInfo(this);
}
/**
* Get last child
*
* @return last child of this node, or null if it has no children
*/
@Override
public Node getLastChild() {
return getFirstChild();
}
/**
* Return a NodeList that contains all children of this node. If
* there are no children, this is a NodeList containing no
* nodes.
*/
@Override
public NodeList getChildNodes() {
List list = new ArrayList<>(1);
list.add(getFirstChild());
return new DOMNodeList(list);
}
/**
* If this attribute was explicitly given a value in the original
* document, this is true ; otherwise, it is
* false. (DOM method)
*
* @return Always true in this implementation.
*/
@Override
public boolean getSpecified() {
return true;
}
/**
* Set the value of an attribute node. (DOM method).
* Always fails (because tree is readonly)
* @throws org.w3c.dom.DOMException always, to indicate that update is not supported in this DOM implementation
*/
@Override
public void setValue(String value) throws DOMException {
disallowUpdate();
}
/**
* Determine whether this (attribute) node is an ID. This method is introduced
* in DOM Level 3.
*/
@Override
public boolean isId() {
return node.isId();
}
/**
* The Element node this attribute is attached to or
* null if this attribute is not in use.
*
* @since DOM Level 2
*/
@Override
public Element getOwnerElement() {
if (node.getNodeKind() == Type.ATTRIBUTE || node.getNodeKind() == Type.NAMESPACE) {
return (Element) wrap(node.getParent());
} else {
throw new UnsupportedOperationException(
"This method is defined only on attribute and namespace nodes");
}
}
/**
* Get the schema type information for this node. Returns null for an untyped node.
*/
/*@Nullable*/
@Override
public TypeInfo getSchemaTypeInfo() {
SchemaType type = node.getSchemaType();
if (type == null || BuiltInAtomicType.UNTYPED_ATOMIC.equals(type)) {
return null;
}
return new TypeInfoImpl(node.getConfiguration(), type);
}
}