package client.net.sf.saxon.ce.sxpath;

import client.net.sf.saxon.ce.expr.Container;
import client.net.sf.saxon.ce.expr.instruct.Executable;
import client.net.sf.saxon.ce.tree.util.SourceLocator;

/**
 * A simple container for standalone XPath expressions
 */
public class SimpleContainer implements Container, SourceLocator {

    private Executable executable;

    public SimpleContainer(Executable exec) {
        this.executable = exec;
    }

    /**
     * Get the Executable (representing a complete stylesheet or query) of which this Container forms part
     *
     * @return the executable
     */
    public Executable getExecutable() {
        return executable;
    }

    /**
     * Get the LocationProvider allowing location identifiers to be resolved.
     *
     * @return the location provider
     */
    public SourceLocator getSourceLocator() {
        return this;
    }

    /**
     * Get the granularity of the container. During successive phases of compilation, growing
     * expression trees are rooted in containers of increasing granularity. The granularity
     * of the container is used to avoid "repotting" a tree more frequently than is required,
     * as this requires a complete traversal of the tree which can take a measurable time.
     *
     * @return 0 for a temporary container created during parsing; 1 for a container
     *         that operates at the level of an XPath expression; 2 for a container at the level
     *         of a global function or template
     */
    public int getContainerGranularity() {
        return 1;
    }

     /**
     * Return the system identifier for the current document event.
     * <p/>
     * <p>The return value is the system identifier of the document
     * entity or of the external parsed entity in which the markup that
     * triggered the event appears.</p>
     * <p/>
     * <p>If the system identifier is a URL, the parser must resolve it
     * fully before passing it to the application.</p>
     *
     * @return A string containing the system identifier, or null
     *         if none is available.
     */
    public String getSystemId() {
        return null;
    }

    public String getLocation() {
        return null;
    }

}

// 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.