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package org.apache.commons.jexl.util; |
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public class Coercion |
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{ |
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public static Boolean coerceBoolean(Object val) { |
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if (val == null) |
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{ |
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return Boolean.FALSE; |
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} |
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else if (val instanceof Boolean) |
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{ |
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return (Boolean) val; |
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} |
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else if (val instanceof String) |
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{ |
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return Boolean.valueOf((String) val); |
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} |
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return null; |
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} |
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public static Integer coerceInteger(Object val) |
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throws Exception |
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{ |
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if (val == null) |
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{ |
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return new Integer(0); |
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} |
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else if (val instanceof String) |
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{ |
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if("".equals((String) val)) |
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return new Integer(0); |
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return Integer.valueOf((String)val); |
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} |
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else if(val instanceof Character) |
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{ |
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return new Integer((int)((Character)val).charValue()); |
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} |
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else if(val instanceof Boolean) |
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{ |
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throw new Exception("Boolean->Integer coercion exception"); |
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} |
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else if(val instanceof Number) |
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{ |
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return new Integer(((Number)val).intValue()); |
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} |
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throw new Exception("Integer coercion exception"); |
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} |
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public static Long coerceLong(Object val) |
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throws Exception |
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{ |
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if (val == null) |
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return new Long(0); |
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} |
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else if (val instanceof String) |
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{ |
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if("".equals((String) val)) |
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return new Long(0); |
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return Long.valueOf((String)val); |
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} |
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else if(val instanceof Character) |
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{ |
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return new Long((long)((Character)val).charValue()); |
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} |
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else if(val instanceof Boolean) |
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{ |
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throw new Exception("Boolean->Integer coercion exception"); |
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} |
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else if(val instanceof Number) |
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{ |
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return new Long(((Number)val).longValue()); |
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} |
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throw new Exception("Long coercion exception"); |
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} |
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public static Double coerceDouble(Object val) |
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throws Exception |
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{ |
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if (val == null) |
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return new Double(0); |
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} |
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else if (val instanceof String) |
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{ |
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if("".equals((String) val)) |
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return new Double(0); |
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return new Double((String) val); |
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} |
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else if(val instanceof Character) |
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{ |
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int i = ((Character)val).charValue(); |
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return new Double(Double.parseDouble(String.valueOf(i))); |
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} |
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else if(val instanceof Boolean) |
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{ |
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throw new Exception("Boolean->Integer coercion exception"); |
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} |
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else if(val instanceof Double) |
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{ |
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return (Double) val; |
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} |
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else if (val instanceof Number) |
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{ |
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return new Double(Double.parseDouble(String.valueOf(val))); |
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} |
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throw new Exception("Double coercion exception"); |
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} |
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public static boolean isFloatingPoint( final Object o ) |
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{ |
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return o instanceof Float || o instanceof Double; |
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} |
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public static boolean isNumberable( final Object o ) |
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{ |
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return o instanceof Integer |
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|| o instanceof Long |
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|| o instanceof Byte |
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|| o instanceof Short |
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|| o instanceof Character; |
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} |
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} |