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A complete, Java-based solution for accessing, manipulating,
and outputting XML data
/*--
Copyright (C) 2000-2012 Jason Hunter & Brett McLaughlin.
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 disclaimer that follows
these conditions in the documentation and/or other materials
provided with the distribution.
3. The name "JDOM" must not be used to endorse or promote products
derived from this software without prior written permission. For
written permission, please contact .
4. Products derived from this software may not be called "JDOM", nor
may "JDOM" appear in their name, without prior written permission
from the JDOM Project Management .
In addition, we request (but do not require) that you include in the
end-user documentation provided with the redistribution and/or in the
software itself an acknowledgement equivalent to the following:
"This product includes software developed by the
JDOM Project (http://www.jdom.org/)."
Alternatively, the acknowledgment may be graphical using the logos
available at http://www.jdom.org/images/logos.
THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED 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 JDOM AUTHORS OR THE PROJECT
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.
This software consists of voluntary contributions made by many
individuals on behalf of the JDOM Project and was originally
created by Jason Hunter and
Brett McLaughlin . For more information
on the JDOM Project, please see mapData = null;
/**
* Default, no-args constructor for implementations
* to use if needed.
*/
protected ProcessingInstruction() {
super(CType.ProcessingInstruction);
}
/**
* This will create a new ProcessingInstruction
* with the specified target.
*
* @param target String target of PI.
* @throws IllegalTargetException if the given target is illegal
* as a processing instruction name.
*/
public ProcessingInstruction(String target) {
this(target, "");
}
/**
* This will create a new ProcessingInstruction
* with the specified target and data.
*
* @param target String target of PI.
* @param data Map data for PI, in
* name/value pairs
* @throws IllegalTargetException if the given target is illegal
* as a processing instruction name.
*/
public ProcessingInstruction(String target, Map data) {
super(CType.ProcessingInstruction);
setTarget(target);
setData(data);
}
/**
* This will create a new ProcessingInstruction
* with the specified target and data.
*
* @param target String target of PI.
* @param data String data for PI.
* @throws IllegalTargetException if the given target is illegal
* as a processing instruction name.
*/
public ProcessingInstruction(String target, String data) {
super(CType.ProcessingInstruction);
setTarget(target);
setData(data);
}
/**
* This will set the target for the PI.
*
* @param newTarget String new target of PI.
* @return ProcessingInstruction - this PI modified.
*/
public ProcessingInstruction setTarget(String newTarget) {
String reason;
if ((reason = Verifier.checkProcessingInstructionTarget(newTarget))
!= null) {
throw new IllegalTargetException(newTarget, reason);
}
target = newTarget;
return this;
}
/**
* Returns the XPath 1.0 string value of this element, which is the
* data of this PI.
*
* @return the data of this PI
*/
@Override
public String getValue() {
return rawData;
}
/**
* This will retrieve the target of the PI.
*
* @return String - target of PI.
*/
public String getTarget() {
return target;
}
/**
* This will return the raw data from all instructions.
*
* @return String - data of PI.
*/
public String getData() {
return rawData;
}
/**
* This will return a List containing the names of the
* "attribute" style pieces of name/value pairs in this PI's data.
*
* @return List - the List containing the
* "attribute" names.
*/
public List getPseudoAttributeNames() {
return new ArrayList(mapData.keySet());
}
/**
* This will set the raw data for the PI.
*
* @param data String data of PI.
* @return ProcessingInstruction - this PI modified.
*/
public ProcessingInstruction setData(String data) {
String reason = Verifier.checkProcessingInstructionData(data);
if (reason != null) {
throw new IllegalDataException(data, reason);
}
this.rawData = data;
this.mapData = parseData(data);
return this;
}
/**
* This will set the name/value pairs within the passed
* Map as the pairs for the data of
* this PI. The keys should be the pair name
* and the values should be the pair values.
*
* @param data new map data to use
* @return ProcessingInstruction - modified PI.
*/
public ProcessingInstruction setData(Map data) {
String temp = toString(data);
String reason = Verifier.checkProcessingInstructionData(temp);
if (reason != null) {
throw new IllegalDataException(temp, reason);
}
this.rawData = temp;
this.mapData = new LinkedHashMap(data);
return this;
}
/**
* This will return the value for a specific
* name/value pair on the PI. If no such pair is
* found for this PI, null is returned.
*
* @param name String name of name/value pair
* to lookup value for.
* @return String - value of name/value pair.
*/
public String getPseudoAttributeValue(String name) {
return mapData.get(name);
}
/**
* This will set a pseudo attribute with the given name and value.
* If the PI data is not already in a pseudo-attribute format, this will
* replace the existing data.
*
* @param name String name of pair.
* @param value String value for pair.
* @return ProcessingInstruction this PI modified.
*/
public ProcessingInstruction setPseudoAttribute(String name, String value) {
String reason = Verifier.checkProcessingInstructionData(name);
if (reason != null) {
throw new IllegalDataException(name, reason);
}
reason = Verifier.checkProcessingInstructionData(value);
if (reason != null) {
throw new IllegalDataException(value, reason);
}
this.mapData.put(name, value);
this.rawData = toString(mapData);
return this;
}
/**
* This will remove the pseudo attribute with the specified name.
*
* @param name name of pseudo attribute to remove
* @return boolean - whether the requested
* instruction was removed.
*/
public boolean removePseudoAttribute(String name) {
if ((mapData.remove(name)) != null) {
rawData = toString(mapData);
return true;
}
return false;
}
/**
* This will convert the Map to a string representation.
*
* @param pmapData Map PI data to convert
* @return a string representation of the Map as appropriate for a PI
*/
private static final String toString(Map pmapData) {
StringBuilder stringData = new StringBuilder();
for (Map.Entry me : pmapData.entrySet()) {
stringData.append(me.getKey())
.append("=\"")
.append(me.getValue())
.append("\" ");
}
// Remove last space, if we did any appending
if (stringData.length() > 0) {
stringData.setLength(stringData.length() - 1);
}
return stringData.toString();
}
/**
* This will parse and load the instructions for the PI.
* This is separated to allow it to occur once and then be reused.
*/
private Map parseData(String prawData) {
// The parsing here is done largely "by hand" which means the code
// gets a little tricky/messy. The following conditions should
// now be handled correctly:
// Reads OK
// Reads OK
// Reads OK
// Reads OK
// Empty Map
// Empty Map
// Empty Map
Map data = new LinkedHashMap();
// System.out.println("rawData: " + rawData);
// The inputData variable holds the part of rawData left to parse
String inputData = prawData.trim();
// Iterate through the remaining inputData string
while (!inputData.trim().equals("")) {
//System.out.println("parseData() looking at: " + inputData);
// Search for "name =", "name=" or "name1 name2..."
String name = "";
String value = "";
int startName = 0;
char previousChar = inputData.charAt(startName);
int pos = 1;
for (; pos 0) {
//if (data.containsKey(name)) {
// A repeat, that's a parse error, so return a null map
//return new HashMap();
//}
//else {
data.put(name, value);
//}
}
}
return data;
}
/**
* This is a helper routine, only used by parseData, to extract a
* quoted String from the input parameter, rawData. A quoted string
* can use either single or double quotes, but they must match up.
* A singly quoted string can contain an unbalanced amount of double
* quotes, or vice versa. For example, the String "JDOM's the best"
* is legal as is 'JDOM"s the best'.
*
* @param rawData the input string from which a quoted string is to
* be extracted.
* @return the first quoted string encountered in the input data. If
* no quoted string is found, then the empty string, "", is
* returned.
* @see #parseData
*/
private static int[] extractQuotedString(String rawData) {
// Remembers whether we're actually in a quoted string yet
boolean inQuotes = false;
// Remembers which type of quoted string we're in
char quoteChar = '"';
// Stores the position of the first character inside
// the quoted string (i.e. the start of the return string)
int start = 0;
// Iterate through the input string looking for the start
// and end of the quoted string
for (int pos=0; pos < rawData.length(); pos++) {
char currentChar = rawData.charAt(pos);
if (currentChar=='"' || currentChar=='\'') {
if (!inQuotes) {
// We're entering a quoted string
quoteChar = currentChar;
inQuotes = true;
start = pos+1;
}
else if (quoteChar == currentChar) {
// We're leaving a quoted string
inQuotes = false;
return new int[] { start, pos };
}
// Otherwise we've encountered a quote
// inside a quote, so just continue
}
}
return null;
}
/**
* This returns a String representation of the
* ProcessingInstruction, suitable for debugging. If the XML
* representation of the ProcessingInstruction is desired,
* {@link org.jdom2.output.XMLOutputter#outputString(ProcessingInstruction)}
* should be used.
*
* @return String - information about the
* ProcessingInstruction
*/
@Override
public String toString() {
return new StringBuilder()
.append("[ProcessingInstruction: ")
.append(new org.jdom2.output.XMLOutputter().outputString(this))
.append("]")
.toString();
}
@Override
public ProcessingInstruction clone() {
ProcessingInstruction pi = (ProcessingInstruction) super.clone();
// target and rawdata are immutable and references copied by
// Object.clone()
// Create a new Map object for the clone (since Map isn't Cloneable)
pi.mapData = parseData(rawData);
return pi;
}
@Override
public ProcessingInstruction detach() {
return (ProcessingInstruction)super.detach();
}
@Override
protected ProcessingInstruction setParent(Parent parent) {
return (ProcessingInstruction)super.setParent(parent);
}
}
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