com.jogamp.gluegen.cgram.types.TypeComparator Maven / Gradle / Ivy

/**
 * Copyright 2015 JogAmp Community. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification, are
 * permitted provided that the following conditions are met:
 *
 *    1. Redistributions of source code must retain the above copyright notice, this list of
 *       conditions and the following disclaimer.
 *
 *    2. Redistributions in binary form 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.
 *
 * THIS SOFTWARE IS PROVIDED BY JogAmp Community ``AS IS'' AND ANY EXPRESS OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JogAmp Community OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * The views and conclusions contained in the software and documentation are those of the
 * authors and should not be interpreted as representing official policies, either expressed
 * or implied, of JogAmp Community.
 */
package com.jogamp.gluegen.cgram.types;

import java.util.List;

public class TypeComparator {
    /**
     * Supports semantic equality and hash functions for types.
     */
    public static interface SemanticEqualityOp {
        /**
         * Semantic hashcode for Types exclusive its given {@link #getName() name}.
         * @see #equalSemantics(SemanticEqualityOp)
         */
        int hashCodeSemantics();

        /**
         * Semantic equality test for Types exclusive its given {@link #getName() name}.
         * @see #hashCodeSemantics()
         */
        boolean equalSemantics(final SemanticEqualityOp arg);
    }
    /**
     * Supports common interface for {@link SemanticEqualityOp} and {@link AliasedSymbol}.
     */
    public static interface AliasedSemanticSymbol extends AliasedSymbol, SemanticEqualityOp { };

    /** Helper routine for list equality comparison*/
    static  boolean listsEqual(final List a, final List b) {
        if( a == null ) {
            if( null != b ) {
                return false;
            } else {
                return true; // elements equal, i.e. both null
            }
        }
        if( b != null && a.size() == b.size() ) {
            final int count = a.size();
            for(int i=0; i int listsHashCode(final List a) {
        if( a == null ) {
            return 0;
        } else {
            final int count = a.size();
            int hash = 31;
            for(int i=0; i boolean listsEqualSemantics(final List a, final List b) {
        if( a == null ) {
            if( null != b ) {
                return false;
            } else {
                return true; // elements equal, i.e. both null
            }
        }
        if( b != null && a.size() == b.size() ) {
            final int count = a.size();
            for(int i=0; i int listsHashCodeSemantics(final List a) {
        if( a == null ) {
            return 0;
        } else {
            final int count = a.size();
            int hash = 31;
            for(int i=0; i