jodd.typeconverter.impl.DoubleArrayConverter Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of jodd-all Show documentation
Show all versions of jodd-all Show documentation
Jodd bundle - all classes in one jar
// Copyright (c) 2003-present, Jodd Team (http://jodd.org)
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice,
// this list of conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.
package jodd.typeconverter.impl;
import jodd.typeconverter.TypeConverter;
import jodd.typeconverter.TypeConverterManagerBean;
import jodd.util.StringUtil;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
/**
* Converts given object to double[]
.
*/
public class DoubleArrayConverter implements TypeConverter {
protected final TypeConverterManagerBean typeConverterManagerBean;
public DoubleArrayConverter(TypeConverterManagerBean typeConverterManagerBean) {
this.typeConverterManagerBean = typeConverterManagerBean;
}
public double[] convert(Object value) {
if (value == null) {
return null;
}
Class valueClass = value.getClass();
if (!valueClass.isArray()) {
// source is not an array
return convertValueToArray(value);
}
// source is an array
return convertArrayToArray(value);
}
/**
* Converts type using type converter manager.
*/
protected double convertType(Object value) {
return typeConverterManagerBean.convertType(value, double.class).doubleValue();
}
/**
* Creates an array with single element.
*/
protected double[] convertToSingleElementArray(Object value) {
return new double[] {convertType(value)};
}
/**
* Converts non-array value to array. Detects various
* collection types and iterates them to make conversion
* and to create target array.
*/
protected double[] convertValueToArray(Object value) {
if (value instanceof List) {
List list = (List) value;
double[] target = new double[list.size()];
for (int i = 0; i < list.size(); i++) {
Object element = list.get(i);
target[i] = convertType(element);
}
return target;
}
if (value instanceof Collection) {
Collection collection = (Collection) value;
double[] target = new double[collection.size()];
int i = 0;
for (Object element : collection) {
target[i] = convertType(element);
i++;
}
return target;
}
if (value instanceof Iterable) {
Iterable iterable = (Iterable) value;
ArrayList doubleArrayList = new ArrayList<>();
for (Object element : iterable) {
double convertedValue = convertType(element);
doubleArrayList.add(Double.valueOf(convertedValue));
}
double[] array = new double[doubleArrayList.size()];
for (int i = 0; i < doubleArrayList.size(); i++) {
Double d = doubleArrayList.get(i);
array[i] = d.doubleValue();
}
return array;
}
if (value instanceof CharSequence) {
String[] strings = StringUtil.splitc(value.toString(), ArrayConverter.NUMBER_DELIMITERS);
return convertArrayToArray(strings);
}
// everything else:
return convertToSingleElementArray(value);
}
/**
* Converts array value to array.
*/
protected double[] convertArrayToArray(Object value) {
Class valueComponentType = value.getClass().getComponentType();
if (valueComponentType == double.class) {
// equal types, no conversion needed
return (double[]) value;
}
double[] result;
if (valueComponentType.isPrimitive()) {
// convert primitive array to target array
result = convertPrimitiveArrayToArray(value, valueComponentType);
} else {
// convert object array to target array
Object[] array = (Object[]) value;
result = new double[array.length];
for (int i = 0; i < array.length; i++) {
result[i] = convertType(array[i]);
}
}
return result;
}
/**
* Converts primitive array to target array.
*/
protected double[] convertPrimitiveArrayToArray(Object value, Class primitiveComponentType) {
double[] result = null;
if (primitiveComponentType == double[].class) {
return (double[]) value;
}
if (primitiveComponentType == int.class) {
int[] array = (int[]) value;
result = new double[array.length];
for (int i = 0; i < array.length; i++) {
result[i] = array[i];
}
}
else if (primitiveComponentType == long.class) {
long[] array = (long[]) value;
result = new double[array.length];
for (int i = 0; i < array.length; i++) {
result[i] = array[i];
}
}
else if (primitiveComponentType == float.class) {
float[] array = (float[]) value;
result = new double[array.length];
for (int i = 0; i < array.length; i++) {
result[i] = array[i];
}
}
else if (primitiveComponentType == short.class) {
short[] array = (short[]) value;
result = new double[array.length];
for (int i = 0; i < array.length; i++) {
result[i] = array[i];
}
}
else if (primitiveComponentType == byte.class) {
byte[] array = (byte[]) value;
result = new double[array.length];
for (int i = 0; i < array.length; i++) {
result[i] = array[i];
}
}
else if (primitiveComponentType == char.class) {
char[] array = (char[]) value;
result = new double[array.length];
for (int i = 0; i < array.length; i++) {
result[i] = array[i];
}
}
else if (primitiveComponentType == boolean.class) {
boolean[] array = (boolean[]) value;
result = new double[array.length];
for (int i = 0; i < array.length; i++) {
result[i] = array[i] ? 1 : 0;
}
}
return result;
}
}