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package com.jclark.xsl.expr;
import com.jclark.xsl.om.*;
class PrecedingSiblingAxisExpr extends ReverseAxisExpr {
public NodeIterator eval(Node node, ExprContext context) throws XSLException {
return precedingSiblings(node);
}
static NodeIterator precedingSiblings(Node node) throws XSLException {
if (node.getType() == Node.ATTRIBUTE)
return null;
Node tem = node.getParent();
if (tem == null)
return new SingleNodeIterator(null);
NodeIterator iter = tem.getChildren();
tem = iter.next();
if (tem.equals(node))
return new SingleNodeIterator(null);
Node[] nodes = new Node[1];
int off = nodes.length;
nodes[--off] = tem;
for (tem = iter.next(); !tem.equals(node); tem = iter.next()) {
if (off == 0) {
Node oldNodes[] = nodes;
nodes = new Node[oldNodes.length * 2];
System.arraycopy(oldNodes, 0, nodes, oldNodes.length, oldNodes.length);
off = oldNodes.length;
}
nodes[--off] = tem;
}
return new ArrayNodeIterator(nodes, off, nodes.length);
}
int getOptimizeFlags() {
return SINGLE_LEVEL;
}
}
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