org.apache.camel.converter.jaxp.DomConverter Maven / Gradle / Ivy
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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.camel.converter.jaxp;
import java.io.ByteArrayInputStream;
import java.io.InputStream;
import java.io.UnsupportedEncodingException;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import javax.xml.transform.TransformerException;
import org.w3c.dom.Attr;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.w3c.dom.Text;
import org.apache.camel.Converter;
import org.apache.camel.Exchange;
import org.apache.camel.support.ExchangeHelper;
import org.apache.camel.support.ObjectHelper;
/**
* Converts from some DOM types to Java types
*/
@Converter(generateLoader = true)
public final class DomConverter {
private final XmlConverter xml;
public DomConverter() {
xml = new XmlConverter();
}
@Converter
public String toString(NodeList nodeList, Exchange exchange) throws TransformerException {
// converting NodeList to String is more tricky
// sometimes the NodeList is a Node which we can then leverage
// the XML converter to turn into XML incl. tags
StringBuilder buffer = new StringBuilder();
// use XML converter at first since it preserves tag names
boolean found = false;
if (nodeList instanceof Node) {
Node node = (Node) nodeList;
String s = toString(node, exchange);
if (org.apache.camel.util.ObjectHelper.isNotEmpty(s)) {
found = true;
buffer.append(s);
}
} else {
// use XML converter at first since it preserves tag names
int size = nodeList.getLength();
for (int i = 0; i < size; i++) {
Node node = nodeList.item(i);
String s = toString(node, exchange);
if (org.apache.camel.util.ObjectHelper.isNotEmpty(s)) {
found = true;
buffer.append(s);
}
}
}
// and eventually we must fallback to append without tags, such as when you have
// used an xpath to select an attribute or text() or something
if (!found) {
append(buffer, nodeList);
}
return buffer.toString();
}
private String toString(Node node, Exchange exchange) throws TransformerException {
String s;
if (node instanceof Text) {
Text textnode = (Text) node;
StringBuilder b = new StringBuilder();
b.append(textnode.getNodeValue());
textnode = (Text) textnode.getNextSibling();
while (textnode != null) {
b.append(textnode.getNodeValue());
textnode = (Text) textnode.getNextSibling();
}
s = b.toString();
} else {
s = xml.toString(node, exchange);
}
return s;
}
@Converter
public static Integer toInteger(NodeList nodeList) {
StringBuilder buffer = new StringBuilder();
append(buffer, nodeList);
String s = buffer.toString();
return Integer.valueOf(s);
}
@Converter
public static Long toLong(NodeList nodeList) {
StringBuilder buffer = new StringBuilder();
append(buffer, nodeList);
String s = buffer.toString();
return Long.valueOf(s);
}
@Converter
public static List> toList(NodeList nodeList) {
List