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package com.enonic.xp.query.expr;

import java.util.Collection;

import com.google.common.collect.ImmutableList;

import com.enonic.xp.annotation.PublicApi;
import com.enonic.xp.support.AbstractImmutableEntityList;

@PublicApi
public class OrderExpressions
    extends AbstractImmutableEntityList
{
    private OrderExpressions( final ImmutableList list )
    {
        super( list );
    }

    public static OrderExpressions empty()
    {
        return new OrderExpressions( ImmutableList.of() );
    }

    public static OrderExpressions from( final OrderExpr... orderExprs )
    {
        return new OrderExpressions( ImmutableList.copyOf( orderExprs ) );
    }

    public static OrderExpressions from( final Collection orderExprs )
    {
        return new OrderExpressions( ImmutableList.copyOf( orderExprs ) );
    }

    public static Builder create()
    {
        return new Builder();
    }

    public static class Builder
    {
        final ImmutableList.Builder orderExprs = ImmutableList.builder();

        public Builder add( final OrderExpr orderExpr )
        {
            this.orderExprs.add( orderExpr );
            return this;
        }

        public OrderExpressions build()
        {
            return new OrderExpressions( this.orderExprs.build() );
        }

    }

}