eqlobject.java

CRM源码This file describes some issues that should be implemented in future and how it should be imple

/*
 * Copyright 2006-2007 Queplix Corp.
 *
 * Licensed under the Queplix Public License, Version 1.1.1 (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.queplix.com/solutions/commercial-open-source/queplix-public-license/
 *
 * 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.queplix.core.modules.eql;

import com.queplix.core.error.GenericSystemException;

import java.util.Date;

/**
 * <p>EQL object abstract class</p>
 * @author Baranov Andrey [ALB]
 * @version $Revision: 1.2 $ $Date: 2006/01/20 15:19:10 $
 */

public abstract class EQLObject
    implements EQLReqSubOpMember, java.io.Serializable {

    public abstract Object getObject();

    public abstract int getSqlType();

    /**
     * Get instance of EQLObject
     * @param value EQLObject constructor parameter
     * @return instance of EQLObject
     */
    public static EQLObject getInstance( Object value ) {

        if( value == null )
            return EQLNullObject.getInstance();
        else if( value instanceof Number )
            return new EQLNumberObject( ( Number ) value );
        else if( value instanceof String )
            return new EQLStringObject( ( String ) value );
        else if( value instanceof java.sql.Time )
            return new EQLTimeObject( ( java.sql.Time ) value );
        else if( value instanceof Date )
            return new EQLDateObject( ( Date ) value );
        else if( value instanceof char[] )
            return new EQLMemoObject( ( char[] ) value );
        else if( value instanceof byte[] )
            return new EQLBinaryObject( ( byte[] ) value );
        else
            throw new GenericSystemException( "Can't get EQL object for '" + value.getClass() + "'" );
    }

    public int hashCode() {
        return getObject().hashCode();
    }

    public boolean equals( Object o ) {
        if( o == null || ! ( o instanceof EQLObject ) )
            return false;

        if( o == this )
            return true;

        EQLObject obj = ( EQLObject ) o;
        return( getObject() == null && obj.getObject() == null ) ||
            ( getObject() != null && obj.getObject() != null && getObject().equals( obj.getObject() ) );
    }

    /**
     * Builds special short string.
     * It can be used for logging...
     * @return String
     */
    public String toShortString() {
        String s = toString();
        if( s != null && s.length() > 100 ) {
            s = s.substring( 0, 100 ) + "...";
        }
        return s;
    }
}