com.wpl.db.query.jpa.Limit.java Source code

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Here is the source code for com.wpl.db.query.jpa.Limit.java

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/*
 * Copyright 2011 Kenny Chong (wongpeiling.com)
 *
 * 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.wpl.db.query.jpa;

import javax.persistence.Query;

import org.apache.commons.lang.StringUtils;

import com.wpl.db.query.AbstractQueryBuilder;
import com.wpl.db.query.IQuery;

/**
 * Limit the query result.
 */
public final class Limit extends AbstractQueryBuilder {

    private final Integer mFirst;
    private final Integer mMax;

    public Limit(final Integer first, final Integer max) {
        super(null);
        mFirst = first;
        mMax = max;
    }

    public void setParameter(final IQuery query) {

        final Query q = (Query) query.getQuery();

        if (mFirst != null) {
            q.setFirstResult(mFirst);
        }

        if (mMax != null) {
            q.setMaxResults(mMax);
        }
    }

    public String toQuery() {
        return StringUtils.EMPTY;
    }
}