package client.net.sf.saxon.ce.pattern;
import client.net.sf.saxon.ce.om.Axis;
import client.net.sf.saxon.ce.tree.iter.AxisIterator;
import client.net.sf.saxon.ce.om.NodeInfo;
import client.net.sf.saxon.ce.om.NamePool;
import client.net.sf.saxon.ce.type.Type;
/**
* A DocumentNodeTest implements the test document-node(element(~,~))
*/
// This is messy because the standard interface for a NodeTest does not allow
// any navigation from the node in question - it only tests for the node kind,
// node name, and type annotation of the node.
public class DocumentNodeTest extends NodeTest {
private NodeTest elementTest;
public DocumentNodeTest(NodeTest elementTest) {
this.elementTest = elementTest;
}
/**
* Test whether this node test is satisfied by a given node
* @param nodeKind The type of node to be matched
* @param fingerprint identifies the expanded name of the node to be matched
*/
public boolean matches(int nodeKind, int fingerprint, int annotation) {
throw new UnsupportedOperationException("DocumentNodeTest doesn't support this method");
}
/**
* Determine whether this Pattern matches the given Node.
* @param node The NodeInfo representing the Element or other node to be tested against the Pattern
* uses variables, or contains calls on functions such as document() or key().
* @return true if the node matches the Pattern, false otherwise
*/
public boolean matches(NodeInfo node) {
if (node.getNodeKind() != Type.DOCUMENT) {
return false;
}
AxisIterator iter = node.iterateAxis(Axis.CHILD);
// The match is true if there is exactly one element node child, no text node
// children, and the element node matches the element test.
boolean found = false;
while (true) {
NodeInfo n = (NodeInfo)iter.next();
if (n==null) {
return found;
}
int kind = n.getNodeKind();
if (kind==Type.TEXT) {
return false;
} else if (kind==Type.ELEMENT) {
if (found) {
return false;
}
if (elementTest.matches(n)) {
found = true;
} else {
return false;
}
}
}
}
/**
* Determine the default priority of this node test when used on its own as a Pattern
*/
public final double getDefaultPriority() {
return elementTest.getDefaultPriority();
}
/**
* Determine the types of nodes to which this pattern applies. Used for optimisation.
* @return the type of node matched by this pattern. e.g. Type.ELEMENT or Type.TEXT
*/
public int getPrimitiveType() {
return Type.DOCUMENT;
}
/**
* Get a mask indicating which kinds of nodes this NodeTest can match. This is a combination
* of bits: 1<<Type.ELEMENT for element nodes, 1<<Type.TEXT for text nodes, and so on.
*/
public int getNodeKindMask() {
return 1<<Type.DOCUMENT;
}
/**
* Get the element test contained within this document test
* @return the contained element test
*/
public NodeTest getElementTest() {
return elementTest;
}
public String toString(NamePool pool) {
return "document-node(" + elementTest.toString(pool) + ')';
}
public String toString() {
return "document-node(" + elementTest.toString() + ')';
}
/**
* Returns a hash code value for the object.
*/
public int hashCode() {
return elementTest.hashCode()^12345;
}
public boolean equals(Object other) {
return other instanceof DocumentNodeTest &&
((DocumentNodeTest)other).elementTest.equals(elementTest);
}
}
// 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.