r/org.eclipse.statet.r.ui/src/org/eclipse/statet/internal/r/ui/datafilterview/Text2NumConverter.java

/*=============================================================================#
 # Copyright (c) 2012, 2019 Stephan Wahlbrink and others.
 # 
 # This program and the accompanying materials are made available under the
 # terms of the Eclipse Public License 2.0 which is available at
 # https://www.eclipse.org/legal/epl-2.0, or the Apache License, Version 2.0
 # which is available at https://www.apache.org/licenses/LICENSE-2.0.
 # 
 # SPDX-License-Identifier: EPL-2.0 OR Apache-2.0
 # 
 # Contributors:
 #     Stephan Wahlbrink <sw@wahlbrink.eu> - initial API and implementation
 #=============================================================================*/

package org.eclipse.statet.internal.r.ui.datafilterview;

import org.eclipse.core.databinding.conversion.IConverter;


public class Text2NumConverter implements IConverter {
	
	
	public Text2NumConverter() {
	}
	
	
	@Override
	public Object getFromType() {
		return String.class;
	}
	
	@Override
	public Object getToType() {
		return Double.TYPE;
	}
	
	@Override
	public Object convert(final Object fromObject) {
		String s= (String) fromObject;
		if (s == null || (s= s.trim()).length() == 0) {
			throw new IllegalArgumentException();
		}
		if (s.charAt(s.length()-1) == 'f') {
			if (s.endsWith("Inf")) { //$NON-NLS-1$
				s= s.substring(0, s.length()-3) + "Infinity"; //$NON-NLS-1$
			}
			else {
				s= s.substring(0, s.length()-1);
			}
		}
		return Double.parseDouble(s);
	}
	
}