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Provides a basic XSLT 2.0 and XQuery 1.0 processor (W3C Recommendations, January 2007). Command line interfaces and implementations of several Java APIs (DOM, XPath, s9api) are also included.

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package net.sf.saxon.expr;

import net.sf.saxon.Controller;
import net.sf.saxon.trace.ExpressionPresenter;
import net.sf.saxon.value.Value;
import net.sf.saxon.event.SequenceOutputter;
import net.sf.saxon.event.PipelineConfiguration;
import net.sf.saxon.om.*;
import net.sf.saxon.trans.XPathException;
import net.sf.saxon.type.ItemType;
import net.sf.saxon.type.Type;
import net.sf.saxon.type.TypeHierarchy;

import java.util.Arrays;
import java.util.Iterator;


/**
 * An abstract implementation of Expression designed to make it easy to implement new expressions,
 * in particular, expressions to support extension instructions.
 */

public abstract class SimpleExpression extends Expression {

    public static final Expression[] NO_ARGUMENTS = new Expression[0];

    protected Expression[] arguments = NO_ARGUMENTS;

    /**
     * Constructor
     */

    public SimpleExpression() {
    }

    /**
     * Set the immediate sub-expressions of this expression.
     * @param sub an array containing the sub-expressions of this expression
     */

    public void setArguments(Expression[] sub) {
        arguments = sub;
        for (int i=0; i