Copyright (c) 2000, 2013 IBM Corporation and others.
 This program and the accompanying materials
 are made available under the terms of the Eclipse Public License 2.0
 which accompanies this distribution, and is available at
 https://www.eclipse.org/legal/epl-2.0/
 SPDX-License-Identifier: EPL-2.0
 Contributors:
    IBM Corporation - initial API and implementation
/*******************************************************************************
 *  Copyright (c) 2000, 2013 IBM Corporation and others.
 *
 *  This program and the accompanying materials
 *  are made available under the terms of the Eclipse Public License 2.0
 *  which accompanies this distribution, and is available at
 *  https://www.eclipse.org/legal/epl-2.0/
 *
 *  SPDX-License-Identifier: EPL-2.0
 * 
 *  Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.ant.internal.core.ant;

import java.text.MessageFormat; // can't use ICU in ant

import org.apache.tools.ant.BuildException;
import org.apache.tools.ant.Project;
import org.apache.tools.ant.input.DefaultInputHandler;
import org.apache.tools.ant.input.InputHandler;

This class exists so that the Ant integration has backwards compatibility with Ant releases previous to 1.5. InputHandlers are a new feature of Ant
1.5.
/**
 * This class exists so that the Ant integration has backwards compatibility with Ant releases previous to 1.5. InputHandlers are a new feature of Ant
 * 1.5.
 */
class InputHandlerSetter {

	protected void setInputHandler(Project project, String inputHandlerClassname) {
		InputHandler handler = null;
		if (inputHandlerClassname == null) {
			handler = new DefaultInputHandler();
		} else {
			try {
				handler = (InputHandler) (Class.forName(inputHandlerClassname).newInstance());
			}
			catch (ClassCastException e) {
				String msg = MessageFormat.format(InternalAntMessages.InternalAntRunner_handler_does_not_implement_InputHandler5, new Object[] { inputHandlerClassname });
				throw new BuildException(msg, e);
			}
			catch (Exception e) {
				String msg = MessageFormat.format(InternalAntMessages.InternalAntRunner_Unable_to_instantiate_input_handler_class, new Object[] {
						inputHandlerClassname, e.getClass().getName() });
				throw new BuildException(msg, e);
			}
		}
		project.setInputHandler(handler);
		project.setProjectReference(handler);
	}
}