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An XProc 1.0 processor
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/*
 * Variable.java
 *
 * Copyright 2008 Mark Logic Corporation.
 * All rights reserved.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see .
 */

package com.xmlcalabash.model;

import java.util.Vector;

import net.sf.saxon.s9api.QName;
import net.sf.saxon.s9api.XdmNode;
import com.xmlcalabash.core.XProcException;
import com.xmlcalabash.core.XProcRuntime;
import com.xmlcalabash.core.XProcConstants;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 *
 * @author ndw
 */
public class Variable extends EndPoint implements ComputableValue {
    private QName name = null;
    private String select = null;
    private SequenceType sequenceType = null;
    private Vector nsBindings = new Vector ();

    /* Creates a new instance of Variable */
    public Variable(XProcRuntime xproc, XdmNode node) {
        super(xproc,node);
    }

    public void setName(QName name) {
        this.name = name;
    }

    public QName getName() {
        return name;
    }

    public String getType() {
        return null;
    }

    public QName getTypeAsQName() {
        return null;
    }

    public void setSequenceType(SequenceType sequenceType) {
        this.sequenceType = sequenceType;
    }

    public SequenceType getSequenceType() {
        return sequenceType;
    }

    public void setSelect(String select) {
        this.select = select;
    }

    public String getSelect() {
        return select;
    }

    public void addNamespaceBinding(NamespaceBinding binding) {
        nsBindings.add(binding);
    }

    public Vector getNamespaceBindings() {
        return nsBindings;
    }

    public boolean valid(Environment env) {
        boolean valid = true;

        if (bindings.size() > 1) {
            error(XProcException.dynamicError(8, "Variables can have at most one binding."));
            valid = false;
        }

        if (select == null) {
            error(XProcException.staticError(16, "You must specify select on variable."));
        }
        
        return valid;
    }

    public String toString() {
        return "variable " + name;
    }

    protected void dump(int depth) {
        String indent = "";
        for (int count = 0; count < depth; count++) {
            indent += " ";
        }

        logger.trace(indent + "variable " + getName());
        if (getBinding().size() == 0) {
            logger.trace(indent + "  no binding");
        }
        for (Binding binding : getBinding()) {
            binding.dump(depth+2);
        }
    }
}