package org.apache.commons.ognl;

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.
 */

/**
 * Exception thrown if a property is attempted to be extracted from an object that does not have such a property.
 */
public class NoSuchPropertyException
    extends OgnlException
{

    private static final long serialVersionUID = 2228428181127177178L;

    private Object target;

    private Object name;

    public NoSuchPropertyException( Object target, Object name )
    {
        super( getReason( target, name ) );
    }

    public NoSuchPropertyException( Object target, Object name, Throwable reason )
    {
        super( getReason( target, name ), reason );
        this.target = target;
        this.name = name;
    }

    static String getReason( Object target, Object name )
    {
        StringBuilder ret = new StringBuilder();

        if ( target == null )
        {
            ret.append( "null" );
        }
        else if ( target instanceof Class )
        {
            ret.append( ( (Class<?>) target ).getName() );
        }
        else
        {
            ret.append( target.getClass().getName() );
        }

        ret.append( "." ).append( name );

        return ret.toString();
    }

    public Object getTarget()
    {
        return target;
    }

    public Object getName()
    {
        return name;
    }
}