mobi.cangol.mobile.parser.XmlUtils Maven / Gradle / Ivy
/**
* Copyright (c) 2013 Cangol
*
* 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 mobi.cangol.mobile.parser;
import android.util.Log;
import android.util.Xml;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xmlpull.v1.XmlSerializer;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.UnsupportedEncodingException;
import java.lang.reflect.Constructor;
import java.lang.reflect.Field;
import java.lang.reflect.Modifier;
import java.lang.reflect.ParameterizedType;
import java.util.ArrayList;
import java.util.List;
public class XmlUtils extends Converter {
private static final String TAG = "XmlUtils";
public static final String UTF_8 = "UTF-8";
private XmlUtils() {
}
/**
* 转换Object到xml
*
* @param obj
* @param useAnnotation
* @return
*/
public static String toXml(Object obj, boolean useAnnotation) {
final ByteArrayOutputStream baos = new ByteArrayOutputStream();
final XmlSerializer serializer = Xml.newSerializer();
String result = null;
try {
serializer.setOutput(baos, UTF_8);
serializer.startDocument(UTF_8, true);
toXml(serializer, obj, useAnnotation);
serializer.endDocument();
baos.close();
result = baos.toString(UTF_8);
} catch (IOException e) {
Log.d(TAG, e.getMessage());
}
return result;
}
private static void toXml(XmlSerializer serializer, Object obj, boolean useAnnotation) {
try {
serializer.startTag(null, obj.getClass().getSimpleName());
final Field[] fields = obj.getClass().getDeclaredFields();
for (final Field field : fields) {
field.setAccessible(true);
if (field.isEnumConstant() || Modifier.isFinal(field.getModifiers())) {
continue;
}
final String filedName = getFieldName(field, useAnnotation);
if (!List.class.isAssignableFrom(field.getType())) {
//非集合类型
if (isBaseClass(field.getType())) {
if (field.isAnnotationPresent(Attribute.class)) {
serializer.attribute(null, filedName, String.valueOf(field.get(obj) == null ? "" : field.get(obj)));
} else {
serializer.startTag(null, filedName);
serializer.text(String.valueOf(field.get(obj) == null ? "" : field.get(obj)));
serializer.endTag(null, filedName);
}
} else {
toXml(serializer, field.get(obj), useAnnotation);
}
} else {
//集合类型
if (field.getGenericType() instanceof ParameterizedType) {
final List list = (List) field.get(obj);
if (list != null) {
for (int i = 0; i < list.size(); i++) {
toXml(serializer, list.get(i), useAnnotation);
}
}
} else {
Log.i(TAG, field.getName() + " require have generic");
}
}
}
serializer.endTag(null, obj.getClass().getSimpleName());
} catch (Exception e) {
Log.d(TAG, e.getMessage());
}
}
/*************以下开始是解析XML**************/
/**
* 解析xml流串到c的实例
*
* @param c 解析目标类
* @param str 解析字符串
* @param useAnnotation 是否使用注解
* @param
* @return
* @throws XMLParserException
*/
public static T parserToObject(Class c, String str, boolean useAnnotation) throws XMLParserException {
InputStream inputSteam = null;
try {
inputSteam = new ByteArrayInputStream(str.getBytes(UTF_8));
} catch (UnsupportedEncodingException e) {
Log.d(TAG, e.getMessage());
}
return parserToObject(c, inputSteam, useAnnotation);
}
/**
* 解析xml流串到c的实例
*
* @param c 解析目标类
* @param inputSteam 输入流
* @param useAnnotation 是否使用注解
* @param
* @return
* @throws XMLParserException
*/
public static T parserToObject(Class c, InputStream inputSteam, boolean useAnnotation) throws XMLParserException {
final DocumentParser documentParser = new DocumentParser(inputSteam);
documentParser.parserDom();
return parserToObject(c, documentParser.getRoot(), useAnnotation);
}
/**
* 解析xml流串到c的实例list
*
* @param c 解析目标类
* @param str 解析字符串
* @param useAnnotation 是否使用注解
* @param
* @return
* @throws XMLParserException
*/
public static List parserToList(Class c, String str, boolean useAnnotation) throws XMLParserException {
InputStream inputSteam = null;
try {
inputSteam = new ByteArrayInputStream(str.getBytes(UTF_8));
} catch (UnsupportedEncodingException e) {
Log.d(TAG, e.getMessage());
}
return parserToList(c, inputSteam, useAnnotation);
}
/**
* 解析xml流串到c的实例list
*
* @param c 解析目标类
* @param inputSteam 输入流
* @param useAnnotation 是否使用注解
* @param
* @return
* @throws XMLParserException
*/
public static List parserToList(Class c, InputStream inputSteam, boolean useAnnotation) throws XMLParserException {
final DocumentParser documentParser = new DocumentParser(inputSteam);
documentParser.parserDom();
return parserToList(c, (NodeList) documentParser.getRoot(), useAnnotation);
}
private static T parserToObject(Class c, Node node, boolean useAnnotation) throws XMLParserException {
if (null == node) {
return null;
}
T t = null;
try {
final Constructor constructor = c.getDeclaredConstructor();
constructor.setAccessible(true);
t = (T) constructor.newInstance();
final Field[] fields = c.getDeclaredFields();
String filedName = null;
for (final Field field : fields) {
field.setAccessible(true);
if (field.isEnumConstant() || Modifier.isFinal(field.getModifiers())) {
continue;
}
filedName = getFieldName(field, useAnnotation);
if (!List.class.isAssignableFrom(field.getType())) {
setField(t, field, node, useAnnotation, filedName);
} else {
if (field.getGenericType() instanceof ParameterizedType) {
final ParameterizedType pt = (ParameterizedType) field.getGenericType();
final Class genericClazz = (Class) pt.getActualTypeArguments()[0];
final List list = parserToList(genericClazz, getNodeList(node, filedName), useAnnotation);
field.set(t, list);
} else {
Log.i(TAG, field.getName() + " require have generic");
}
}
}
} catch (Exception e) {
throw new XMLParserException(c, "constructor is not accessible,must have zero-argument constructor", e);
}
return t;
}
private static List parserToList(Class c, NodeList nodeList, boolean useAnnotation) throws XMLParserException {
if (null == nodeList) {
return new ArrayList<>();
}
final List list = new ArrayList<>();
T t = null;
for (int i = 0; i < nodeList.getLength(); i++) {
t = parserToObject(c, nodeList.item(i), useAnnotation);
if (t != null)
list.add(t);
}
return list;
}
private static void setField(T t, Field field, Node node, boolean useAnnotation, String filedName) throws XMLParserException {
field.setAccessible(true);
Object value = null;
try {
if (isBaseClass(field.getType())) {
String valueStr = null;
if (field.isAnnotationPresent(Attribute.class)) {
valueStr = getNodeAttr(node, filedName);
} else {
valueStr = getNodeValue(node, filedName);
}
if (field.getType() == String.class) {
value = valueStr;
} else if (field.getType() == Integer.class || field.getType() == int.class) {
value = parseInt(valueStr, 0);
} else if (field.getType() == Long.class || field.getType() == long.class) {
value = parseLong(valueStr, 0L);
} else if (field.getType() == Double.class || field.getType() == double.class) {
value = parseDouble(valueStr, 0.0d);
} else if (field.getType() == Boolean.class || field.getType() == boolean.class) {
value = parseBoolean(valueStr, false);
} else if (field.getType() == Float.class || field.getType() == float.class) {
value = parseFloat(valueStr, 0.0f);
}
} else {
value = parserToObject(field.getType(), getNode(node, filedName), useAnnotation);
}
field.set(t, value);
} catch (IllegalArgumentException e) {
throw new XMLParserException(t.getClass(), field, "Illegal Argument value=" + value, e);
} catch (IllegalAccessException e) {
throw new XMLParserException(t.getClass(), field, "Illegal Access " + t, e);
}
}
private static Node getNode(Node node, String nodeName) {
return DocumentParser.getNode(node, nodeName);
}
private static NodeList getNodeList(Node node, String nodeName) {
return DocumentParser.getNodeList(node, nodeName);
}
private static String getNodeAttr(Node node, String attrName) {
return DocumentParser.getNodeAttr(node, attrName);
}
public static String getNodeValue(Node node, String nodeName) {
return DocumentParser.getNodeValue(node, nodeName);
}
}