com.netflix.hollow.tools.diff.exact.mapper.DiffEqualityObjectMapper Maven / Gradle / Ivy

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/*
 *  Copyright 2016-2019 Netflix, Inc.
 *
 *     Licensed under the Apache License, Version 2.0 (the "License");
 *     you may not use this file except in compliance with the License.
 *     You may obtain a copy of the License at
 *
 *         http://www.apache.org/licenses/LICENSE-2.0
 *
 *     Unless required by applicable law or agreed to in writing, software
 *     distributed under the License is distributed on an "AS IS" BASIS,
 *     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *     See the License for the specific language governing permissions and
 *     limitations under the License.
 *
 */
package com.netflix.hollow.tools.diff.exact.mapper;

import com.netflix.hollow.core.memory.encoding.HashCodes;
import com.netflix.hollow.core.read.HollowReadFieldUtils;
import com.netflix.hollow.core.read.engine.object.HollowObjectTypeReadState;
import com.netflix.hollow.core.schema.HollowObjectSchema;
import com.netflix.hollow.core.schema.HollowObjectSchema.FieldType;
import com.netflix.hollow.tools.diff.exact.DiffEqualOrdinalMap;
import com.netflix.hollow.tools.diff.exact.DiffEqualityMapping;

/**
 * Not intended for external consumption.
 */
public class DiffEqualityObjectMapper extends DiffEqualityTypeMapper{

    private final HollowObjectSchema commonSchema;
    private final int[] toSchemaCommonFieldMapping;
    private final int[] fromSchemaCommonFieldMapping;
    private final boolean requiresTraversalForMissingFields;

    private final DiffEqualOrdinalMap[] commonReferenceFieldEqualOrdinalMaps;

    public DiffEqualityObjectMapper(DiffEqualityMapping mapping, HollowObjectTypeReadState fromState, HollowObjectTypeReadState toState, boolean oneToOne) {
        super(fromState, toState, oneToOne);
        this.commonSchema = fromState.getSchema().findCommonSchema(toState.getSchema());

        this.commonReferenceFieldEqualOrdinalMaps = new DiffEqualOrdinalMap[commonSchema.numFields()];

        for(int i=0;i