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/*
 * Copyright (c) 1997, 2018 Oracle and/or its affiliates. All rights reserved.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Distribution License v. 1.0, which is available at
 * http://www.eclipse.org/org/documents/edl-v10.php.
 *
 * SPDX-License-Identifier: BSD-3-Clause
 */

package com.sun.xml.xsom.impl.scd;

/*-
 * #%L
 * XSOM
 * %%
 * Copyright (C) 2019 - 2020 Entur
 * %%
 * Licensed under the EUPL, Version 1.1 or – as soon they will be
 * approved by the European Commission - subsequent versions of the
 * EUPL (the "Licence");
 * 
 * You may not use this work except in compliance with the Licence.
 * You may obtain a copy of the Licence at:
 * 
 * http://ec.europa.eu/idabc/eupl5
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the Licence is distributed on an "AS IS" basis,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the Licence for the specific language governing permissions and
 * limitations under the Licence.
 * #L%
 */

import com.sun.xml.xsom.SCD;
import com.sun.xml.xsom.XSComponent;

import java.util.Iterator;

/**
 * Schema component designator.
 *
 * @author Kohsuke Kawaguchi
 */
public final class SCDImpl extends SCD {
    /**
     * SCD is fundamentally a list of steps.
     */
    private final Step[] steps;

    /**
     * The original textual SCD representation.
     */
    private final String text;

    public SCDImpl(String text, Step[] steps) {
        this.text = text;
        this.steps = steps;
    }

    public Iterator select(Iterator contextNode) {
        Iterator nodeSet = (Iterator)contextNode;

        int len = steps.length;
        for( int i=0; i(
                    new Iterators.Map(nodeSet) {
                        protected Iterator apply(XSComponent u) {
                            return new Iterators.Union(
                                Iterators.singleton(u),
                                Axis.INTERMEDIATE_SKIP.iterator(u) );
                        }
                    }
                );
            }
            nodeSet = steps[i].evaluate(nodeSet);
        }

        return nodeSet;
    }

    public String toString() {
        return text;
    }
}