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/*
 * FindBugs - Find Bugs in Java programs
 * Copyright (C) 2006, University of Maryland
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

package edu.umd.cs.findbugs.classfile;

/**
 * Exception to indicate that a resource was not found.
 *
 * @author David Hovemeyer
 */
public class ResourceNotFoundException extends CheckedAnalysisException {
    private final String resourceName;

    public static final String MESSAGE_PREFIX = "Resource not found: ";

    /**
     * Constructor.
     *
     * @param resourceName
     *            name of the missing resource
     */
    public ResourceNotFoundException(String resourceName) {
        super(MESSAGE_PREFIX + resourceName);
        this.resourceName = resourceName;
    }

    /**
     * Constructor.
     *
     * @param resourceName
     *            name of the missing resource
     * @param cause
     *            underlying cause of the exception
     */
    public ResourceNotFoundException(String resourceName, Throwable cause) {
        super(MESSAGE_PREFIX + resourceName, cause);
        this.resourceName = resourceName;
    }

    /**
     * Get the name of the resource that was not found.
     *
     * @return the name of the resource that was not found
     */
    public String getResourceName() {
        return resourceName;
    }

    /**
     * Convert this exception to a ClassNotFoundException. This method should
     * only be called if the ResourceNotFoundException occurs while looking for
     * a class. The message format is parseable by ClassNotFoundExceptionParser.
     */
    public ClassNotFoundException toClassNotFoundException() {
        ClassDescriptor classDescriptor = DescriptorFactory.createClassDescriptorFromResourceName(resourceName);
        return new ClassNotFoundException("ResourceNotFoundException while looking for class "
                + classDescriptor.toDottedClassName() + ": " + getMessage());
    }
}