001/*
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements.  See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License.  You may obtain a copy of the License at
008 *
009 *      http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017
018
019package org.apache.commons.beanutils.converters;
020
021
022import java.util.List;
023import org.apache.commons.beanutils.ConversionException;
024
025
026/**
027 * <p>Standard {@link org.apache.commons.beanutils.Converter} implementation that converts an incoming
028 * String into a primitive array of double.  On a conversion failure, returns
029 * a specified default value or throws a {@link ConversionException} depending
030 * on how this instance is constructed.</p>
031 *
032 * @version $Id: DoubleArrayConverter.java 1454606 2013-03-08 22:30:51Z britter $
033 * @since 1.4
034 * @deprecated Replaced by the new {@link ArrayConverter} implementation
035 */
036
037@Deprecated
038public final class DoubleArrayConverter extends AbstractArrayConverter {
039
040
041    // ----------------------------------------------------------- Constructors
042
043
044    /**
045     * Create a {@link org.apache.commons.beanutils.Converter} that will throw
046     * a {@link ConversionException} if a conversion error occurs.
047     */
048    public DoubleArrayConverter() {
049
050        this.defaultValue = null;
051        this.useDefault = false;
052
053    }
054
055
056    /**
057     * Create a {@link org.apache.commons.beanutils.Converter} that will return
058     * the specified default value if a conversion error occurs.
059     *
060     * @param defaultValue The default value to be returned
061     */
062    public DoubleArrayConverter(Object defaultValue) {
063
064        this.defaultValue = defaultValue;
065        this.useDefault = true;
066
067    }
068
069
070    // ------------------------------------------------------- Static Variables
071
072
073    /**
074     * <p>Model object for type comparisons.</p>
075     */
076    private static final double[] MODEL = new double[0];
077
078
079    // --------------------------------------------------------- Public Methods
080
081
082    /**
083     * Convert the specified input object into an output object of the
084     * specified type.
085     *
086     * @param type Data type to which this value should be converted
087     * @param value The input value to be converted
088     * @return the converted value
089     * @exception ConversionException if conversion cannot be performed
090     *  successfully
091     */
092    @Override
093    public Object convert(Class type, Object value) {
094
095        // Deal with a null value
096        if (value == null) {
097            if (useDefault) {
098                return (defaultValue);
099            } else {
100                throw new ConversionException("No value specified");
101            }
102        }
103
104        // Deal with the no-conversion-needed case
105        if (MODEL.getClass() == value.getClass()) {
106            return (value);
107        }
108
109        // Deal with input value as a String array
110        if (strings.getClass() == value.getClass()) {
111            try {
112                String[] values = (String[]) value;
113                double[] results = new double[values.length];
114                for (int i = 0; i < values.length; i++) {
115                    results[i] = Double.parseDouble(values[i]);
116                }
117                return (results);
118            } catch (Exception e) {
119                if (useDefault) {
120                    return (defaultValue);
121                } else {
122                    throw new ConversionException(value.toString(), e);
123                }
124            }
125        }
126
127        // Parse the input value as a String into elements
128        // and convert to the appropriate type
129        try {
130            List list = parseElements(value.toString());
131            double[] results = new double[list.size()];
132            for (int i = 0; i < results.length; i++) {
133                results[i] = Double.parseDouble((String) list.get(i));
134            }
135            return (results);
136        } catch (Exception e) {
137            if (useDefault) {
138                return (defaultValue);
139            } else {
140                throw new ConversionException(value.toString(), e);
141            }
142        }
143
144    }
145
146
147}