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• CloneCache.java

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/*
 * @(#)CloneCache.java        6.0.0    2024-05-19
 *
 * MathParser.org-mXparser DUAL LICENSE AGREEMENT as of date 2024-05-19
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 * NON-COMMERCIAL LICENSE
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 * Redistribution and use of the PRODUCT in source and/or binary forms,
 * with or without modification, are permitted provided that the following
 * conditions are met:
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 * 1. Redistributions of source code must retain the unmodified content of
 *    the entire MathParser.org-mXparser DUAL LICENSE AGREEMENT, including
 *    the definition of NON-COMMERCIAL USE, the definition of COMMERCIAL USE,
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 * 2. Redistributions in binary form must reproduce the entire content of
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 */
package org.mariuszgromada.math.mxparser;

import java.util.*;

/**
 * A class containing method used while thread safe cloning.
 *
 * @author         Mariusz Gromada

 *                 MathParser.org - mXparser project page

 *                 mXparser on GitHub

 *                 INFIMA place to purchase a commercial MathParser.org-mXparser software license

 *                 [email protected]

 *                 ScalarMath.org - a powerful math engine and math scripting language

 *                 Scalar Lite

 *                 Scalar Pro

 *                 MathSpace.pl

 *
 * @version        5.2.0
 */

class CloneCache {
    private final HashMap argumentClones;
    private final HashMap functionClones;
    private final HashMap constantClones;
    private final HashMap expressionClones;
    private final Set cloneInProgress;

    private final List> argumentsToAddCloneAtTheEnd;
    private final List> functionsToAddCloneAtTheEnd;
    private final List> constantsToAddCloneAtTheEnd;

    CloneCache() {
        argumentClones = new HashMap();
        functionClones = new HashMap();
        constantClones = new HashMap();
        expressionClones = new HashMap();
        cloneInProgress = new HashSet();
        argumentsToAddCloneAtTheEnd = new ArrayList>();
        functionsToAddCloneAtTheEnd = new ArrayList>();
        constantsToAddCloneAtTheEnd = new ArrayList>();
    }

    void clearCache() {
        argumentClones.clear();
        functionClones.clear();
        constantClones.clear();
        expressionClones.clear();
        cloneInProgress.clear();
        argumentsToAddCloneAtTheEnd.clear();
        functionsToAddCloneAtTheEnd.clear();
        constantsToAddCloneAtTheEnd.clear();
    }
    void cacheArgumentToAddCloneAtTheEnd(List argumentsList, Argument argumentBeingCloned, int addAtIndex) {
        argumentsToAddCloneAtTheEnd.add(new ElementAtTheEnd(argumentsList, argumentBeingCloned, addAtIndex));
    }
    void cacheFunctionToAddCloneAtTheEnd(List functionsList, Function functionBeingCloned, int addAtIndex) {
        functionsToAddCloneAtTheEnd.add(new ElementAtTheEnd(functionsList, functionBeingCloned, addAtIndex));
    }
    void cacheConstantToAddCloneAtTheEnd(List constantsList, Constant constantBeingCloned, int addAtIndex) {
        constantsToAddCloneAtTheEnd.add(new ElementAtTheEnd(constantsList, constantBeingCloned, addAtIndex));
    }
    void addAllAtTheEndElements() {
        for (ElementAtTheEnd elementAtTheEnd : argumentsToAddCloneAtTheEnd) {
            Argument argumentClone = getArgumentClone(elementAtTheEnd.elementBeingCloned);
            elementAtTheEnd.targetElementsList.set(elementAtTheEnd.addAtIndex, argumentClone);
        }
        for (ElementAtTheEnd elementAtTheEnd : functionsToAddCloneAtTheEnd) {
            Function functionClone = getFunctionClone(elementAtTheEnd.elementBeingCloned);
            elementAtTheEnd.targetElementsList.set(elementAtTheEnd.addAtIndex, functionClone);
        }
        for (ElementAtTheEnd elementAtTheEnd : constantsToAddCloneAtTheEnd) {
            Constant constantClone = getConstantClone(elementAtTheEnd.elementBeingCloned);
            elementAtTheEnd.targetElementsList.set(elementAtTheEnd.addAtIndex, constantClone);
        }
    }
    void cacheCloneInProgress(PrimitiveElement elementBeingCloned) {
        cloneInProgress.add(elementBeingCloned);
    }
    boolean isCloneInProgress(PrimitiveElement element) {
        return cloneInProgress.contains(element);
    }
    void clearCloneInProgress(PrimitiveElement elementBeingCloned) {
        cloneInProgress.remove(elementBeingCloned);
    }
    void cacheArgumentClone(Argument arg, Argument argClone) {
        argumentClones.put(arg, argClone);
    }
    void cacheFunctionClone(Function fun, Function funClone) {
        functionClones.put(fun, funClone);
    }
    void cacheConstantClone(Constant con, Constant conClone) {
        constantClones.put(con, conClone);
    }
    void cacheExpressionClone(Expression expr, Expression exprClone) {
        expressionClones.put(expr, exprClone);
    }
    Argument getArgumentClone(Argument arg) {
        return argumentClones.get(arg);
    }
    Function getFunctionClone(Function fun) {
        return functionClones.get(fun);
    }
    Constant getConstantClone(Constant con) {
        return constantClones.get(con);
    }
    Expression getExpressionClone(Expression expr) {
        return expressionClones.get(expr);
    }
}

class ElementAtTheEnd {
    final List targetElementsList;
    final T elementBeingCloned;
    final int addAtIndex;
    ElementAtTheEnd(List targetElementsList, T elementBeingCloned, int addAtIndex) {
        this.targetElementsList = targetElementsList;
        this.elementBeingCloned = elementBeingCloned;
        this.addAtIndex = addAtIndex;
    }
}