org.javers.core.metamodel.type.ListType Maven / Gradle / Ivy

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JaVers - object auditing and diff framework for Java

There is a newer version: 7.6.1

package org.javers.core.metamodel.type;

import org.javers.common.collections.EnumerableFunction;
import org.javers.common.collections.Lists;
import org.javers.common.validation.Validate;
import org.javers.core.metamodel.object.EnumerationAwareOwnerContext;
import org.javers.core.metamodel.object.OwnerContext;

import java.lang.reflect.Type;
import java.util.ArrayList;
import java.util.List;
import java.util.function.Function;

import static java.util.Collections.unmodifiableList;
import static java.util.stream.Collectors.toList;

public class ListType extends CollectionType{

    public ListType(Type baseJavaType) {
        super(baseJavaType);
    }

    /**
     * @return immutable List
     */
    @Override
    public Object map(Object sourceEnumerable, EnumerableFunction mapFunction, OwnerContext owner) {
        Validate.argumentsAreNotNull(mapFunction, owner);
        List sourceList = Lists.wrapNull(sourceEnumerable);
        List targetList = new ArrayList(sourceList.size());

        EnumerationAwareOwnerContext enumerationContext = new IndexableEnumerationOwnerContext(owner);
        for (Object sourceVal : sourceList){
            targetList.add(sourceVal == null ? null : mapFunction.apply(sourceVal, enumerationContext));
        }
        return unmodifiableList(targetList);
    }

    @Override
    public Object map(Object sourceEnumerable, Function mapFunction, boolean filterNulls) {
        List sourceCol = Lists.wrapNull(sourceEnumerable);
        return unmodifiableList((List)sourceCol.stream()
            .map(sourceVal -> sourceVal == null ? null : mapFunction.apply(sourceVal))
            .filter(mappedVal -> !filterNulls || mappedVal != null)
            .collect(toList()));
    }

    @Override
    public Class getEnumerableInterface() {
        return List.class;
    }
}