Example usage for javax.persistence.criteria Fetch getAttribute

Introduction

In this page you can find the example usage for javax.persistence.criteria Fetch getAttribute.

Prototype

Attribute<? super Z, ?> getAttribute();

Source Link

Document

Return the metamodel attribute corresponding to the fetch join.

Usage

From source file:org.querybyexample.jpa.JpaUtil.java

/**
 * Convert the passed propertyPath into a JPA path.
 * <p>//from w ww  . j a va 2 s  .c  o m
 * Note: JPA will do joins if the property is in an associated entity.
 */
@SuppressWarnings("unchecked")
public static <E, F> Path<F> getPath(Root<E> root, List<Attribute<?, ?>> attributes) {
    Path<?> path = root;
    for (Attribute<?, ?> attribute : attributes) {
        boolean found = false;
        // handle case when order on already fetched attribute
        for (Fetch<E, ?> fetch : root.getFetches()) {
            if (attribute.getName().equals(fetch.getAttribute().getName()) && (fetch instanceof Join<?, ?>)) {
                path = (Join<E, ?>) fetch;
                found = true;
                break;
            }
        }
        for (Join<E, ?> join : root.getJoins()) {
            if (attribute.getName().equals(join.getAttribute().getName())) {
                path = join;
                found = true;
                break;
            }
        }
        if (!found) {
            path = path.get(attribute.getName());
        }
    }
    return (Path<F>) path;
}

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From source file:org.jdal.dao.jpa.JpaUtils.java

/**
 * Copy Fetches/*from   w ww  .ja  v a2s  . co  m*/
 * @param from source Fetch
 * @param to dest Fetch
 */
public static void copyFetches(Fetch<?, ?> from, Fetch<?, ?> to) {
    for (Fetch<?, ?> f : from.getFetches()) {
        Fetch<?, ?> toFetch = to.fetch(f.getAttribute().getName());
        // recursively copy fetches
        copyFetches(f, toFetch);
    }
}

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From source file:org.jdal.dao.jpa.JpaUtils.java

/**
 * Copy Joins/*from  w  w  w  .j  a v  a2  s. c  o m*/
 * @param from source Join
 * @param to destination Join
 */
public static void copyJoins(From<?, ?> from, From<?, ?> to) {
    for (Join<?, ?> j : from.getJoins()) {
        Join<?, ?> toJoin = to.join(j.getAttribute().getName(), j.getJoinType());
        toJoin.alias(getOrCreateAlias(j));

        copyJoins(j, toJoin);
    }

    for (Fetch<?, ?> f : from.getFetches()) {
        Fetch<?, ?> toFetch = to.fetch(f.getAttribute().getName());
        copyFetches(f, toFetch);

    }
}

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From source file:com.ocs.dynamo.dao.query.JpaQueryBuilder.java

private static boolean isCollectionFetch(FetchParent<?, ?> parent) {
    boolean result = false;

    for (Fetch<?, ?> fetch : parent.getFetches()) {
        Attribute<?, ?> attribute = fetch.getAttribute();

        boolean nested = isCollectionFetch(fetch);
        result = result || attribute.isCollection() || nested;
    }//from   w w  w  . j  av  a  2 s .  co  m
    return result;
}

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From source file:com.dbs.sdwt.jpa.JpaUtil.java

@SuppressWarnings("unchecked")
public <E, F> Path<F> getPath(Root<E> root, List<Attribute<?, ?>> attributes) {
    Path<?> path = root;/*ww  w  .  j  a  v  a2s.  c o  m*/
    for (Attribute<?, ?> attribute : attributes) {
        boolean found = false;
        if (path instanceof FetchParent) {
            for (Fetch<E, ?> fetch : ((FetchParent<?, E>) path).getFetches()) {
                if (attribute.getName().equals(fetch.getAttribute().getName())
                        && (fetch instanceof Join<?, ?>)) {
                    path = (Join<E, ?>) fetch;
                    found = true;
                    break;
                }
            }
        }
        if (!found) {
            if (attribute instanceof PluralAttribute) {
                path = ((From<?, ?>) path).join(attribute.getName(), JoinType.LEFT);
            } else {
                path = path.get(attribute.getName());
            }
        }
    }
    return (Path<F>) path;
}

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From source file:com.zero.dao.impl.BaseDaoImpl.java

private void copyFetches(Fetch<?, ?> from, Fetch<?, ?> to) {
    for (Fetch<?, ?> fetch : from.getFetches()) {
        Fetch<?, ?> toFetch = to.fetch(fetch.getAttribute().getName());
        copyFetches(fetch, toFetch);//w w w.j  a  va2s  .  c  om
    }
}

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From source file:com.zero.dao.impl.BaseDaoImpl.java

private void copyJoins(From<?, ?> from, From<?, ?> to) {
    for (Join<?, ?> join : from.getJoins()) {
        Join<?, ?> toJoin = to.join(join.getAttribute().getName(), join.getJoinType());
        toJoin.alias(getAlias(join));/*  w w  w.  j av  a2  s.  c  o m*/
        copyJoins(join, toJoin);
    }
    for (Fetch<?, ?> fetch : from.getFetches()) {
        Fetch<?, ?> toFetch = to.fetch(fetch.getAttribute().getName());
        copyFetches(fetch, toFetch);
    }
}

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