com.frank.search.solr.core.query.AbstractQuery.java Source code

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Here is the source code for com.frank.search.solr.core.query.AbstractQuery.java

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/*
 * Copyright 2012 - 2014 the original author or authors.
 *
 * 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.frank.search.solr.core.query;

import org.springframework.util.Assert;

/**
 * Base QueryImplementation <br />
 * Construct Query by adding {@link Criteria}.
 * 
 * @author Christoph Strobl
 */
class AbstractQuery {

    private Criteria criteria;
    private Join join;
    private String requestHandler;

    AbstractQuery() {
    }

    AbstractQuery(Criteria criteria) {
        this.addCriteria(criteria);
    }

    /**
     * Add an criteria to the query. The criteria will be connected using 'AND'.
     * 
     * @param criteria
     * @return
     */
    @SuppressWarnings("unchecked")
    public final <T extends SolrDataQuery> T addCriteria(Criteria criteria) {
        Assert.notNull(criteria, "Cannot add null criteria.");

        if (this.criteria == null) {
            this.criteria = criteria;
        } else {
            if (this.criteria instanceof Crotch) {
                ((Crotch) this.criteria).add(criteria);
            } else {
                Crotch tree = new Crotch();
                tree.add(this.criteria);
                tree.add(criteria);
                this.criteria = tree;
            }
        }
        return (T) this;
    }

    /**
     * @return null if not set
     */
    public Criteria getCriteria() {
        return this.criteria;
    }

    /**
     * Set values for join {@code !join from=inner_id to=outer_id}
     * 
     * @param from
     * @param to
     */
    public void setJoin(Join join) {
        this.join = join;
    }

    /**
     * @return null if not set
     */
    public Join getJoin() {
        return join;
    }

    public String getRequestHandler() {
        return requestHandler;
    }

    public void setRequestHandler(String requestHandler) {
        this.requestHandler = requestHandler;
    }

}