gvsig-tools / org.gvsig.tools / library / trunk / org.gvsig.tools / org.gvsig.tools.lib / src / main / java / org / gvsig / tools / dataTypes / impl / coercion / CoerceToDouble.java @ 989
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/**
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* gvSIG. Desktop Geographic Information System.
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*
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* Copyright (C) 2007-2013 gvSIG Association.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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* MA 02110-1301, USA.
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*
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* For any additional information, do not hesitate to contact us
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* at info AT gvsig.com, or visit our website www.gvsig.com.
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*/
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package org.gvsig.tools.dataTypes.impl.coercion; |
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import java.text.NumberFormat; |
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import java.text.ParsePosition; |
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import java.util.Locale; |
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import org.gvsig.tools.dataTypes.CoercionException; |
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import org.gvsig.tools.dataTypes.DataTypesManager.CoercionWithLocale; |
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public class CoerceToDouble implements CoercionWithLocale { |
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public Object coerce(Object value) throws CoercionException { |
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if( value == null ) { |
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return null; |
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} |
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try {
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if (!(value instanceof Double)) { |
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if (value instanceof Number) { |
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value = new Double(((Number) value).doubleValue()); |
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} else {
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String s = value.toString().trim().toLowerCase();
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if( s.startsWith("0x")) { |
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value = new Double(Long.parseLong(s.substring(2), 16)); |
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} else {
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value = Double.valueOf(s);
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} |
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} |
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} |
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return value;
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} catch (Exception e) { |
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throw new CoercionException(e); |
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} |
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} |
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public Object coerce(Object value, Locale locale) throws CoercionException { |
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if( value == null ) { |
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return null; |
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} |
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try {
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if (!(value instanceof Double)) { |
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if (value instanceof Number) { |
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value = new Double(((Number) value).doubleValue()); |
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} else {
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String s = value.toString().trim().toLowerCase();
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if( s.startsWith("0x")) { |
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value = new Double(Long.parseLong(s.substring(2), 16)); |
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} else {
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ParsePosition p = new ParsePosition(0); |
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NumberFormat nf = NumberFormat.getInstance(locale); |
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Number num = nf.parse(s,p);
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if( p.getErrorIndex()>0 || p.getIndex()<s.length() ) { |
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throw new CoercionException("can't coerce to double with locale "+locale.getLanguage()); |
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} |
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value = new Double(num.doubleValue()); |
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} |
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} |
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} |
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return value;
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} catch (CoercionException e) {
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throw e;
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} catch (Exception e) { |
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throw new CoercionException(e); |
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} |
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} |
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} |