baseimportentry.java

drools 一个开放源码的规则引擎

package org.drools.semantics.base;

/*
 * $Id: BaseImportEntry.java,v 1.2 2005/05/04 16:58:39 memelet Exp $
 *
 * Copyright 2002 (C) The Werken Company. All Rights Reserved.
 *
 * Redistribution and use of this software and associated documentation
 * ("Software"), with or without modification, are permitted provided that the
 * following conditions are met:
 *
 * 1. Redistributions of source code must retain copyright statements and
 * notices. Redistributions must also contain a copy of this document.
 *
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer in the documentation
 * and/or other materials provided with the distribution.
 *
 * 3. The name "drools" must not be used to endorse or promote products derived
 * from this Software without prior written permission of The Werken Company.
 * For written permission, please contact [e-mail].
 *
 * 4. Products derived from this Software may not be called "drools" nor may
 * "drools" appear in their names without prior written permission of The Werken
 * Company. "drools" is a registered trademark of The Werken Company.
 *
 * 5. Due credit should be given to The Werken Company.
 * (http://drools.werken.com/).
 *
 * THIS SOFTWARE IS PROVIDED BY THE WERKEN COMPANY AND CONTRIBUTORS ``AS IS''
 * AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE WERKEN COMPANY OR ITS CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 *
 */

import org.drools.spi.ImportEntry;

public class BaseImportEntry implements ImportEntry
{

    private String importEntry;

    public BaseImportEntry(String importEntry)
    {
        if ( importEntry.startsWith( "from " ) )
        {
            importEntry = convertFromPythonImport( importEntry );
        }
        this.importEntry = importEntry;
    }

    /* (non-Javadoc)
     * @see org.drools.spi.ImportEntry#getImportEntry()
     */
    public String getImportEntry()
    {
        return this.importEntry;
    }

    public String toString()
    {
        return "[Import Entry: " + this.importEntry + "]";
    }
    
    private String convertFromPythonImport(String packageText)
    {
        String fromString = "from ";
        String importString = "import ";
        int fromIndex = packageText.indexOf( fromString );
        int importIndex = packageText.indexOf( importString );
        return packageText.substring( fromIndex + fromString.length( ),
                                      importIndex ).trim( ) + "." + packageText.substring( importIndex + importString.length( ) ).trim( );
    }     

    public int hashCode()
    {
        return this.importEntry.hashCode();
    }

    public boolean equals(Object object)
    {
        if ( this == object )
        {
            return true;
        }

        if ( object == null || getClass( ) != object.getClass( ) )
        {
            return false;
        }

        return this.importEntry.equals( ( ( ImportEntry ) object ).getImportEntry( ) );
    }
    
}