Package org.mvel2.conversion

Source Code of org.mvel2.conversion.FloatCH

/**
* MVEL 2.0
* Copyright (C) 2007 The Codehaus
* Mike Brock, Dhanji Prasanna, John Graham, Mark Proctor
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
*     http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
*  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/

package org.mvel2.conversion;

import org.mvel2.ConversionException;
import org.mvel2.ConversionHandler;

import java.math.BigDecimal;
import java.math.BigInteger;
import java.util.HashMap;
import java.util.Map;

import static java.lang.String.valueOf;

public class FloatCH implements ConversionHandler {
  private static final Map<Class, Converter> CNV =
      new HashMap<Class, Converter>();

  private static Converter stringConverter = new Converter() {
    public Object convert(Object o) {
      if (((String) o).length() == 0) return (float) 0;

      return Float.parseFloat(((String) o));
    }
  };

  public Object convertFrom(Object in) {
    if (!CNV.containsKey(in.getClass())) throw new ConversionException("cannot convert type: "
        + in.getClass().getName() + " to: " + Integer.class.getName());
    return CNV.get(in.getClass()).convert(in);
  }


  public boolean canConvertFrom(Class cls) {
    return CNV.containsKey(cls);
  }

  static {
    CNV.put(String.class,
        stringConverter
    );


    CNV.put(Object.class,
        new Converter() {
          public Object convert(Object o) {
            return stringConverter.convert(valueOf(o));
          }
        }
    );

    CNV.put(BigDecimal.class,
        new Converter() {
          public Float convert(Object o) {
            return ((BigDecimal) o).floatValue();
          }
        }
    );


    CNV.put(BigInteger.class,
        new Converter() {
          public Float convert(Object o) {
            return ((BigInteger) o).floatValue();
          }
        }
    );


    CNV.put(Float.class,
        new Converter() {
          public Object convert(Object o) {
            return o;
          }
        }
    );

    CNV.put(Integer.class,
        new Converter() {
          public Float convert(Object o) {
            //noinspection UnnecessaryBoxing
            return ((Integer) o).floatValue();
          }
        }
    );


    CNV.put(Double.class,
        new Converter() {
          public Float convert(Object o) {
            return ((Double) o).floatValue();
          }
        }
    );

    CNV.put(Long.class,
        new Converter() {
          public Float convert(Object o) {
            return ((Long) o).floatValue();
          }
        }
    );

    CNV.put(Short.class,
        new Converter() {
          public Float convert(Object o) {
            return ((Short) o).floatValue();
          }
        }
    );

    CNV.put(Boolean.class,
        new Converter() {
          public Float convert(Object o) {
            if ((Boolean) o) return 1f;
            else return 0f;
          }
        }
    );

  }
}
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