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

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

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/*
 * Copyright 2012 - 2013 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;

import java.util.Arrays;

/**
 * Implementation of {@code not(field|function)}
 * 
 * @author Christoph Strobl
 * @since 1.1
 */
public class NotFunction extends AbstractFunction {

    private static final String OPERATION = "not";

    private NotFunction(Object condition) {
        super(Arrays.asList(condition));
    }

    /**
     * @param field must not be null
     * @return
     */
    public static NotFunction not(Field field) {
        Assert.notNull(field, "Field for not function must not be 'null'");

        return not(field.getName());
    }

    /**
     * @param fieldname must not be empty
     * @return
     */
    public static NotFunction not(String fieldname) {
        Assert.hasText(fieldname, "Fieldname for not function must not be 'empty'.");

        return new NotFunction(fieldname);
    }

    /**
     * @param condition must not be null
     * @return
     */
    public static NotFunction not(Function condition) {
        Assert.notNull(condition, "Condition for not function must not be 'null'");

        return new NotFunction(condition);
    }

    @Override
    public String getOperation() {
        return OPERATION;
    }
}