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The PDS3 Product Tools Library project supports design/generation, validation and submission of archival products to the PDS. This project consists of a library of software classes to support the development of tools to perform these functions and is designed to be utilized by developers from the Engineering Node, Discipline Nodes and the PDS community.

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// Copyright 2019, California Institute of Technology ("Caltech").
// U.S. Government sponsorship acknowledged.
//
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// • Redistributions of source code must retain the above copyright notice,
// this list of conditions and the following disclaimer.
// • Redistributions must reproduce the above copyright notice, this list of
// conditions and the following disclaimer in the documentation and/or other
// materials provided with the distribution.
// • Neither the name of Caltech nor its operating division, the Jet Propulsion
// Laboratory, nor the names of its contributors may be used to endorse or
// promote products derived from this software without specific prior written
// permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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package gov.nasa.pds.tools.label;

import gov.nasa.pds.tools.dict.DictIdentifier;
import gov.nasa.pds.tools.dict.parser.DictIDFactory;

/**
 * This class hides the construction of pointers. It helps determine the exact
 * type of pointer and constructs it. If modifications need to be made to this
 * behavior it will be hidden here.
 * 
 * @author pramirez
 * @author jagander
 * @version $Revision$
 * 
 */
public class PointerStatementFactory {

    public static PointerStatement newInstance(final Label sourceLabel,
            final int line, final String identifier, final Value value) {
        DictIdentifier pointerId = DictIDFactory.createPointerDefId(identifier);
        if (matchesIdentifier(pointerId, SpecialPointer.DESCRIPTION_KEY)) {
            return new DescriptionPointer(sourceLabel, line, pointerId, value);
        } else if (matchesIdentifier(pointerId, SpecialPointer.STRUCTURE_KEY)) {
            return new StructurePointer(sourceLabel, line, pointerId, value);
        } else if (matchesIdentifier(pointerId, SpecialPointer.INDEX_KEY)) {
            return new IndexPointer(sourceLabel, line, pointerId, value);
        } else if (matchesIdentifier(pointerId, SpecialPointer.CATALOG_KEY)) {
            return new CatalogPointer(sourceLabel, line, pointerId, value);
        }
        return new PointerStatement(sourceLabel, line, pointerId, value);
    }

    @SuppressWarnings("nls")
    // comparing to strings since statements are always AttributeStatements at
    // this stage
    private static boolean matchesIdentifier(final DictIdentifier id,
            final String[] testIds) {
        for (final String testId : testIds) {
            final String idString = id.toString();
            if (idString.equals(testId) || idString.endsWith("_" + testId)) {
                return true;
            }
        }
        return false;
    }
}