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net.ymate.platform.configuration.impl.XMLConfigFileParser Maven / Gradle / Ivy
/*
* Copyright 2007-2017 the original author or authors.
*
* 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 net.ymate.platform.configuration.impl;
import net.ymate.platform.configuration.AbstractConfigFileParser;
import net.ymate.platform.core.lang.PairObject;
import org.apache.commons.lang.StringUtils;
import org.w3c.dom.Element;
import org.w3c.dom.NamedNodeMap;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.SAXException;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.URL;
import java.util.ArrayList;
import java.util.List;
/**
* 基于JDK自带的解析工具处理XML配置文件的读写操作
*
* @author 刘镇 ([email protected] ) on 14-11-7 下午3:56
* @version 1.0
*/
public class XMLConfigFileParser extends AbstractConfigFileParser {
private final Element __rootElement;
public XMLConfigFileParser(File file) throws ParserConfigurationException, IOException, SAXException {
__rootElement = DocumentBuilderFactory.newInstance().newDocumentBuilder().parse(file).getDocumentElement();
}
public XMLConfigFileParser(InputStream inputStream) throws ParserConfigurationException, IOException, SAXException {
__rootElement = DocumentBuilderFactory.newInstance().newDocumentBuilder().parse(inputStream).getDocumentElement();
}
public XMLConfigFileParser(URL url) throws ParserConfigurationException, IOException, SAXException {
__rootElement = DocumentBuilderFactory.newInstance().newDocumentBuilder().parse(url.openStream()).getDocumentElement();
}
public XMLConfigFileParser(Node node) {
__rootElement = (Element) node;
}
@Override
public void __doLoad() {
NamedNodeMap __rootAttrNodes = __rootElement.getAttributes();
if (__rootAttrNodes != null && __rootAttrNodes.getLength() > 0) {
// 提取root标签的所有属性
for (int _attrIdx = 0; _attrIdx < __rootAttrNodes.getLength(); _attrIdx++) {
String _attrKey = __rootAttrNodes.item(_attrIdx).getNodeName();
String _attrValue = __rootAttrNodes.item(_attrIdx).getNodeValue();
if (StringUtils.isNotBlank(_attrKey) && StringUtils.isNotBlank(_attrValue)) {
__rootAttributes.put(_attrKey, new Attribute(_attrKey, _attrValue));
}
}
}
//
NodeList _nodes = __rootElement.getElementsByTagName(TAG_NAME_CATEGORY);
if (_nodes.getLength() > 0) {
for (int _idx = 0; _idx < _nodes.getLength(); _idx++) {
Element _categoryElement = (Element) _nodes.item(_idx);
// 1. 处理category的属性
List _categoryAttrs = new ArrayList();
PairObject _category = __doParseNodeAttributes(_categoryAttrs, _categoryElement, false, false);
//
if (_category != null) {
// 2. 处理category的property标签
List _properties = new ArrayList();
//
NodeList _propertyNodes = _categoryElement.getElementsByTagName(TAG_NAME_PROPERTY);
if (_propertyNodes.getLength() > 0) {
for (int _idy = 0; _idy < _propertyNodes.getLength(); _idy++) {
Element _node = (Element) _propertyNodes.item(_idy);
// 3. 处理property的属性
List _propertyAttrs = new ArrayList();
PairObject _property = __doParseNodeAttributes(_propertyAttrs, _node, false, false);
if (_property != null) {
// 是否有子标签
boolean _hasSubTag = false;
// 4.1 处理property->value标签
NodeList _childNodes = _node.getElementsByTagName(TAG_NAME_VALUE);
if (_childNodes.getLength() > 0) {
if (_childNodes.getLength() == 1) {
_property.setValue(_childNodes.item(0).getTextContent());
} else {
_hasSubTag = true;
for (int _idxItem = 0; _idxItem < _childNodes.getLength(); _idxItem++) {
Element _nodeItem = (Element) _childNodes.item(_idxItem);
String _value = _nodeItem.getTextContent();
if (StringUtils.isNotBlank(_value)) {
_propertyAttrs.add(new Attribute(_value, ""));
}
}
}
} else {
// 4.2 处理property->item标签
_childNodes = _node.getElementsByTagName(TAG_NAME_ITEM);
if (_childNodes.getLength() > 0) {
_hasSubTag = true;
for (int _idxItem = 0; _idxItem < _childNodes.getLength(); _idxItem++) {
__doParseNodeAttributes(_propertyAttrs, (Element) _childNodes.item(_idxItem), true, true);
}
}
}
//
if (!_hasSubTag) {
if (StringUtils.isNotBlank(_property.getValue())) {
_properties.add(new Property(_property.getKey(), _property.getValue(), _propertyAttrs));
}
} else {
_properties.add(new Property(_property.getKey(), null, _propertyAttrs));
}
}
}
}
//
__categories.put(_category.getKey(), new Category(_category.getKey(), _categoryAttrs, _properties, __sorted));
}
}
}
// 必须保证DEFAULT_CATEGORY_NAME配置集合存在
if (!__categories.containsKey(DEFAULT_CATEGORY_NAME)) {
__categories.put(DEFAULT_CATEGORY_NAME, new Category(DEFAULT_CATEGORY_NAME, null, null, __sorted));
}
}
private PairObject __doParseNodeAttributes(List attributes, Element node, boolean collections, boolean textContent) {
String _propertyName = null;
String _propertyContent = null;
//
NamedNodeMap _attrNodes = node.getAttributes();
if (_attrNodes != null && _attrNodes.getLength() > 0) {
for (int _idy = 0; _idy < _attrNodes.getLength(); _idy++) {
String _attrKey = _attrNodes.item(_idy).getNodeName();
String _attrValue = _attrNodes.item(_idy).getNodeValue();
if (collections) {
if ("name".equals(_attrKey)) {
attributes.add(new Attribute(_attrValue, node.getTextContent()));
}
} else {
if (textContent && StringUtils.isNotBlank(_attrValue)) {
_attrValue = node.getTextContent();
}
if ("name".equals(_attrKey)) {
_propertyName = _attrValue;
} else if ("value".equals(_attrKey)) {
_propertyContent = _attrValue;
} else {
attributes.add(new Attribute(_attrKey, _attrValue));
}
}
}
}
if (!collections && StringUtils.isNotBlank(_propertyName)) {
return new PairObject(_propertyName, _propertyContent);
}
return null;
}
@Override
public void writeTo(File targetFile) throws IOException {
// TODO write file
}
@Override
public void writeTo(OutputStream outputStream) throws IOException {
// TODO write file
}
}
