- /*
- * Copyright 2001-2004 The Apache Software Foundation.
- *
- * 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.apache.commons.beanutils.converters;
-
-
- import java.util.List;
- import org.apache.commons.beanutils.ConversionException;
- import org.apache.commons.beanutils.Converter;
-
-
- /**
- * <p>Standard {@link Converter} implementation that converts an incoming
- * String into a primitive array of double. On a conversion failure, returns
- * a specified default value or throws a {@link ConversionException} depending
- * on how this instance is constructed.</p>
- *
- * @author Craig R. McClanahan
- * @version $Revision: 1.7 $ $Date: 2004/02/28 13:18:34 $
- * @since 1.4
- */
-
- public final class DoubleArrayConverter extends AbstractArrayConverter {
-
-
- // ----------------------------------------------------------- Constructors
-
-
- /**
- * Create a {@link Converter} that will throw a {@link ConversionException}
- * if a conversion error occurs.
- */
- public DoubleArrayConverter() {
-
- this.defaultValue = null;
- this.useDefault = false;
-
- }
-
-
- /**
- * Create a {@link Converter} that will return the specified default value
- * if a conversion error occurs.
- *
- * @param defaultValue The default value to be returned
- */
- public DoubleArrayConverter(Object defaultValue) {
-
- this.defaultValue = defaultValue;
- this.useDefault = true;
-
- }
-
-
- // ------------------------------------------------------- Static Variables
-
-
- /**
- * <p>Model object for type comparisons.</p>
- */
- private static double model[] = new double[0];
-
-
- // --------------------------------------------------------- Public Methods
-
-
- /**
- * Convert the specified input object into an output object of the
- * specified type.
- *
- * @param type Data type to which this value should be converted
- * @param value The input value to be converted
- *
- * @exception ConversionException if conversion cannot be performed
- * successfully
- */
- public Object convert(Class type, Object value) {
-
- // Deal with a null value
- if (value == null) {
- if (useDefault) {
- return (defaultValue);
- } else {
- throw new ConversionException("No value specified");
- }
- }
-
- // Deal with the no-conversion-needed case
- if (model.getClass() == value.getClass()) {
- return (value);
- }
-
- // Deal with input value as a String array
- if (strings.getClass() == value.getClass()) {
- try {
- String values[] = (String[]) value;
- double results[] = new double[values.length];
- for (int i = 0; i < values.length; i++) {
- results[i] = Double.parseDouble(values[i]);
- }
- return (results);
- } catch (Exception e) {
- if (useDefault) {
- return (defaultValue);
- } else {
- throw new ConversionException(value.toString(), e);
- }
- }
- }
-
- // Parse the input value as a String into elements
- // and convert to the appropriate type
- try {
- List list = parseElements(value.toString());
- double results[] = new double[list.size()];
- for (int i = 0; i < results.length; i++) {
- results[i] = Double.parseDouble((String) list.get(i));
- }
- return (results);
- } catch (Exception e) {
- if (useDefault) {
- return (defaultValue);
- } else {
- throw new ConversionException(value.toString(), e);
- }
- }
-
- }
-
-
- }