Comment.java

package client.net.sf.saxon.ce.expr.instruct;
import client.net.sf.saxon.ce.event.SequenceReceiver;
import client.net.sf.saxon.ce.expr.*;
import client.net.sf.saxon.ce.om.StandardNames;
import client.net.sf.saxon.ce.pattern.NodeKindTest;
import client.net.sf.saxon.ce.trans.XPathException;
import client.net.sf.saxon.ce.type.ItemType;
import client.net.sf.saxon.ce.type.TypeHierarchy;


/**
* An instruction representing an xsl:comment element in the stylesheet.
*/

public final class Comment extends SimpleNodeConstructor {

    /**
    * Construct the instruction
    */

    public Comment() {}

    /**
    * Get the instruction name, for diagnostics and tracing
    * return the string "xsl:comment"
    */

    public int getInstructionNameCode() {
        return StandardNames.XSL_COMMENT;
    }

    public ItemType getItemType(TypeHierarchy th) {
        return NodeKindTest.COMMENT;
    }

    public int getCardinality() {
        return StaticProperty.EXACTLY_ONE;
    }


    public void localTypeCheck(ExpressionVisitor visitor, ItemType contextItemType) throws XPathException {

    }


    /**
     * Process the value of the node, to create the new node.
     * @param value the string value of the new node
     * @param context the dynamic evaluation context
     * @throws XPathException
     */

    public void processValue(CharSequence value, XPathContext context) throws XPathException {
        //String comment = expandChildren(context).toString();
        String comment = checkContent(value.toString(), context);
        SequenceReceiver out = context.getReceiver();
        out.comment(comment);
    }

    /**
     * Check the content of the node, and adjust it if necessary
     *
     * @param comment    the supplied content
     * @param context the dynamic context
     * @return the original content, unless adjustments are needed
     * @throws XPathException if the content is invalid
     */

    protected String checkContent(String comment, XPathContext context) throws XPathException {
        while(true) {
            int hh = comment.indexOf("--");
            if (hh < 0) break;
            comment = comment.substring(0, hh+1) + ' ' + comment.substring(hh+1);
        }
        if (comment.length()>0 && comment.charAt(comment.length()-1)=='-') {
            comment = comment + ' ';
        }
        return comment;
    }


}
// 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.