com.epam.deltix.qsrv.hf.tickdb.schema.MetaDataChange Maven / Gradle / Ivy

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/*
 * Copyright 2024 EPAM Systems, Inc
 *
 * See the NOTICE file distributed with this work for additional information
 * regarding copyright ownership. 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.epam.deltix.qsrv.hf.tickdb.schema;

import com.epam.deltix.qsrv.hf.pub.md.*;

import javax.xml.bind.annotation.XmlElement;
import java.util.ArrayList;

public class MetaDataChange implements SchemaChange {

    protected MetaDataChange() { } // for jaxb

    protected ClassSet source;
    protected MetaData target;

    @XmlElement
    public EnumMapping enumMapping = new EnumMapping();

    @XmlElement
    public ContentType sourceType;
    @XmlElement
    public ContentType targetType;
    
    @XmlElement
    public SchemaMapping mapping; // predefined mappings

    @XmlElement
    public ArrayList changes = new ArrayList();

    public MetaDataChange(ClassSet source,
                          MetaData target,
                          SchemaMapping mapping) {
        this.source = source;
        this.target = target;
        this.mapping = mapping;
    }

    public ClassSet   getSource() {
        return source;
    }

    public Impact getChangeImpact() {
        if (sourceType != targetType)
            return Impact.DataLoss;

        Impact result = Impact.None;
        
        for (ClassDescriptorChange change : changes) {
            Impact imp = change.getChangeImpact(mapping);
            if (imp == Impact.DataLoss)
                return Impact.DataLoss;
            else if (imp == Impact.DataConvert)
                result = Impact.DataConvert;
        }

        return result;
    }   

    public ClassDescriptorChange getChange(ClassDescriptor source, ClassDescriptor target) {
        for (ClassDescriptorChange change : changes) {
            if (source != null && source.equals(change.getSource()))
                return change;
            if (target != null && target.equals(change.getTarget()))
                return change;
        }

        return null;
    }

    public void         add(ClassDescriptorChange change) {
        if (change != null)
            changes.add(change);
    }

    public void                 invalidate(
            ClassSet source,
            MetaData target)
    {
        this.source = source;
        this.target = target;
        
        for (ClassDescriptorChange change : changes) {
            if (change.getSource() == null && change.getSourceId() != null)
                change.source = getClassDescriptor(source, change.getSourceId());

            if (change.getTarget() == null && change.getTargetId() != null)
                change.target = getClassDescriptor(target, change.getTargetId());
        }
    }

    public static RecordClassDescriptor getClassDescriptor(ClassSet set, String guid) {
        
        ClassDescriptor[] classes = set.getClasses();

        for (int i = 0; i < classes.length; i++) {
            if (guid.equals(classes[i].getGuid()))
                return (RecordClassDescriptor) classes[i];
        }

//        Optional match = Stream.of(classes).filter(x -> guid.equals(x.getGuid())).findFirst();
//        return (RecordClassDescriptor) match.orElse(null);

        return null;
    }

    public MetaData getTarget() {
        return target;
    }

    /**
     * Indicates, that this change can be applied to metadata.
     */
    public boolean isAcceptable() {
        return getChangeImpact() != Impact.DataLoss;
    }

    public boolean hasChanges() {
        return (changes != null && !changes.isEmpty()) ||
            (sourceType != targetType);
    }

    public enum ContentType {
        Polymorphic, Fixed, Mixed
    }
}