Inefficient EhCache Performance

Question

Using thoses JPA properties

props.put( \"hibernate.cache.use_query_cache\", \"true\" );
props.put( \"hibernate.cache.use_second_level_cache\", \"true\" );
p         


        

Answer 1

Recursive version Full working

Class org.hibernate.type.AbstractType

public int getHashCode(Object x) {      
        if (x instanceof Object[]){
            int result = 1;
            for (Object element : (Object[]) x)
                result = 31 * result + (element == null ? 0 : getHashCode(element));
            return result;
        }
        return x.hashCode();
    }

AND

public static boolean arraysEquals(Object[] a, Object[] a2) {
            if (a==a2)
                return true;
            if (a==null || a2==null)
                return false;

            int length = a.length;
            if (a2.length != length)
                return false;

            for (int i=0; i<length; i++) {
                Object o1 = a[i];
                Object o2 = a2[i];
                if (o1==null){
                    if (o2!=null)                   
                        return false;
                }else{
                    if (o2==null)
                        return false;
                    if (o1 instanceof Object[]){
                        if (!(o2 instanceof Object[]))
                            return false;
                        else
                            if (!arraysEquals( (Object[]) o1, (Object[]) o2))
                                return false;
                    }else
                        if (!o1.equals(o2))
                            return false;
                }                           
            }
            return true;
    }
    public static boolean equals(final Object x, final Object y) {
        if (x!=null && x instanceof Object[] && y!=null && y instanceof Object[] )
            return arraysEquals((Object[])x, (Object[])y);
        return x == y || ( x != null && y != null && x.equals( y ) );
    }