Criteria.java

/*
 * #%L
 * Service Activity Monitoring :: Server
 * %%
 * Copyright (C) 2011 - 2012 Talend Inc.
 * %%
 * 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.
 * #L%
 */
package org.talend.esb.sam.server.persistence.criterias;

/**
 * Criterias used for searching and filtering.
 *
 * @author zubairov
 */
public abstract class Criteria {

    protected final String name;

    protected final String columnName;

    /**
     * Instantiates a new criteria.
     *
     * @param name the name
     * @param colunmName the colunm name
     */
    public Criteria(String name, String colunmName) {
        this.name = name;
        this.columnName = colunmName;
    }

    /**
     * Gets the name.
     *
     * @return the name
     */
    public String getName() {
        return name;
    }

    /* (non-Javadoc)
     * @see java.lang.Object#equals(java.lang.Object)
     */
    @Override
    public boolean equals(Object obj) {
        if (obj instanceof Criteria) {
            return name.equals(((Criteria)obj).name);
        }
        return super.equals(obj);
    }

    /* (non-Javadoc)
     * @see java.lang.Object#hashCode()
     */
    @Override
    public int hashCode() {
        return name.hashCode();
    }

    /**
     * Creates a copy of the given {@link Criteria} populated
     * with the parsed value or throws an exception.
     *
     * @param attribute the attribute
     * @return the criteria[]
     */
    public abstract Criteria[] parseValue(String attribute);

    /**
     * Returns a value of the Criteria that in suitable SQL type.
     *
     * @return the value
     */
    public abstract Object getValue();

    /**
     * Returns something like (COLUMN = :name).
     *
     * @return the filter clause
     */
    public abstract StringBuilder getFilterClause();

}