package jdiff;
import java.io.*;
import java.util.*;
/* For SAX XML parsing */
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import org.xml.sax.SAXParseException;
import org.xml.sax.XMLReader;
import org.xml.sax.InputSource;
import org.xml.sax.helpers.*;
/**
* Creates a Comments from an XML file. The Comments object is the internal
* representation of the comments for the changes.
* All methods in this class for populating a Comments object are static.
*
* See the file LICENSE.txt for copyright details.
* @author Matthew Doar, mdoar@pobox.com
*/
public class Comments {
/**
* All the possible comments known about, accessible by the commentID.
*/
public static Hashtable allPossibleComments = new Hashtable();
/** The old Comments object which is populated from the file read in. */
private static Comments oldComments_ = null;
/** Default constructor. */
public Comments() {
commentsList_ = new ArrayList(); // SingleComment[]
}
// The list of comments elements associated with this objects
public List commentsList_ = null; // SingleComment[]
/**
* Read the file where the XML for comments about the changes between
* the old API and new API is stored and create a Comments object for
* it. The Comments object may be null if no file exists.
*/
public static Comments readFile(String filename) {
// If validation is desired, write out the appropriate comments.xsd
// file in the same directory as the comments XML file.
if (XMLToAPI.validateXML) {
writeXSD(filename);
}
// If the file does not exist, return null
File f = new File(filename);
if (!f.exists())
return null;
// The instance of the Comments object which is populated from the file.
oldComments_ = new Comments();
try {
DefaultHandler handler = new CommentsHandler(oldComments_);
XMLReader parser = null;
try {
String parserName = System.getProperty("org.xml.sax.driver");
if (parserName == null) {
parser = org.xml.sax.helpers.XMLReaderFactory.createXMLReader("org.apache.xerces.parsers.SAXParser");
} else {
// Let the underlying mechanisms try to work out which
// class to instantiate
parser = org.xml.sax.helpers.XMLReaderFactory.createXMLReader();
}
} catch (SAXException saxe) {
System.out.println("SAXException: " + saxe);
saxe.printStackTrace();
System.exit(1);
}
if (XMLToAPI.validateXML) {
parser.setFeature("http://xml.org/sax/features/namespaces", true);
parser.setFeature("http://xml.org/sax/features/validation", true);
parser.setFeature("http://apache.org/xml/features/validation/schema", true);
}
parser.setContentHandler(handler);
parser.setErrorHandler(handler);
parser.parse(new InputSource(new FileInputStream(new File(filename))));
} catch(org.xml.sax.SAXNotRecognizedException snre) {
System.out.println("SAX Parser does not recognize feature: " + snre);
snre.printStackTrace();
System.exit(1);
} catch(org.xml.sax.SAXNotSupportedException snse) {
System.out.println("SAX Parser feature is not supported: " + snse);
snse.printStackTrace();
System.exit(1);
} catch(org.xml.sax.SAXException saxe) {
System.out.println("SAX Exception parsing file '" + filename + "' : " + saxe);
saxe.printStackTrace();
System.exit(1);
} catch(java.io.IOException ioe) {
System.out.println("IOException parsing file '" + filename + "' : " + ioe);
ioe.printStackTrace();
System.exit(1);
}
Collections.sort(oldComments_.commentsList_);
return oldComments_;
} //readFile()
/**
* Write the XML Schema file used for validation.
*/
public static void writeXSD(String filename) {
String xsdFileName = filename;
int idx = xsdFileName.lastIndexOf('\\');
int idx2 = xsdFileName.lastIndexOf('/');
if (idx == -1 && idx2 == -1) {
xsdFileName = "";
} else if (idx == -1 && idx2 != -1) {
xsdFileName = xsdFileName.substring(0, idx2+1);
} else if (idx != -1 && idx2 == -1) {
xsdFileName = xsdFileName.substring(0, idx+1);
} else if (idx != -1 && idx2 != -1) {
int max = idx2 > idx ? idx2 : idx;
xsdFileName = xsdFileName.substring(0, max+1);
}
xsdFileName += "comments.xsd";
try {
FileOutputStream fos = new FileOutputStream(xsdFileName);
PrintWriter xsdFile = new PrintWriter(fos);
// The contents of the comments.xsd file
xsdFile.println("<?xml version=\"1.0\" encoding=\"iso-8859-1\" standalone=\"no\"?>");
xsdFile.println("<xsd:schema xmlns:xsd=\"http://www.w3.org/2001/XMLSchema\">");
xsdFile.println();
xsdFile.println("<xsd:annotation>");
xsdFile.println(" <xsd:documentation>");
xsdFile.println(" Schema for JDiff comments.");
xsdFile.println(" </xsd:documentation>");
xsdFile.println("</xsd:annotation>");
xsdFile.println();
xsdFile.println("<xsd:element name=\"comments\" type=\"commentsType\"/>");
xsdFile.println();
xsdFile.println("<xsd:complexType name=\"commentsType\">");
xsdFile.println(" <xsd:sequence>");
xsdFile.println(" <xsd:element name=\"comment\" type=\"commentType\" minOccurs='0' maxOccurs='unbounded'/>");
xsdFile.println(" </xsd:sequence>");
xsdFile.println(" <xsd:attribute name=\"name\" type=\"xsd:string\"/>");
xsdFile.println(" <xsd:attribute name=\"jdversion\" type=\"xsd:string\"/>");
xsdFile.println("</xsd:complexType>");
xsdFile.println();
xsdFile.println("<xsd:complexType name=\"commentType\">");
xsdFile.println(" <xsd:sequence>");
xsdFile.println(" <xsd:element name=\"identifier\" type=\"identifierType\" minOccurs='1' maxOccurs='unbounded'/>");
xsdFile.println(" <xsd:element name=\"text\" type=\"xsd:string\" minOccurs='1' maxOccurs='1'/>");
xsdFile.println(" </xsd:sequence>");
xsdFile.println("</xsd:complexType>");
xsdFile.println();
xsdFile.println("<xsd:complexType name=\"identifierType\">");
xsdFile.println(" <xsd:attribute name=\"id\" type=\"xsd:string\"/>");
xsdFile.println("</xsd:complexType>");
xsdFile.println();
xsdFile.println("</xsd:schema>");
xsdFile.close();
} catch(IOException e) {
System.out.println("IO Error while attempting to create " + xsdFileName);
System.out.println("Error: " + e.getMessage());
System.exit(1);
}
}
//
// Methods to add data to a Comments object. Called by the XML parser and the
// report generator.
//
/**
* Add the SingleComment object to the list of comments kept by this
* object.
*/
public void addComment(SingleComment comment) {
commentsList_.add(comment);
}
//
// Methods to get data from a Comments object. Called by the report generator
//
/**
* The text placed into XML comments file where there is no comment yet.
* It never appears in reports.
*/
public static final String placeHolderText = "InsertCommentsHere";
/**
* Return the comment associated with the given id in the Comment object.
* If there is no such comment, return the placeHolderText.
*/
public static String getComment(Comments comments, String id) {
if (comments == null)
return placeHolderText;
SingleComment key = new SingleComment(id, null);
int idx = Collections.binarySearch(comments.commentsList_, key);
if (idx < 0) {
return placeHolderText;
} else {
int startIdx = comments.commentsList_.indexOf(key);
int endIdx = comments.commentsList_.indexOf(key);
int numIdx = endIdx - startIdx + 1;
if (numIdx != 1) {
System.out.println("Warning: " + numIdx + " identical ids in the existing comments file. Using the first instance.");
}
SingleComment singleComment = (SingleComment)(comments.commentsList_.get(idx));
// Convert @link tags to links
return singleComment.text_;
}
}
/**
* Convert @link tags to HTML links.
*/
public static String convertAtLinks(String text, String currentElement,
PackageAPI pkg, ClassAPI cls) {
if (text == null)
return null;
StringBuffer result = new StringBuffer();
int state = -1;
final int NORMAL_TEXT = -1;
final int IN_LINK = 1;
final int IN_LINK_IDENTIFIER = 2;
final int IN_LINK_IDENTIFIER_REFERENCE = 3;
final int IN_LINK_IDENTIFIER_REFERENCE_PARAMS = 6;
final int IN_LINK_LINKTEXT = 4;
final int END_OF_LINK = 5;
StringBuffer identifier = null;
StringBuffer identifierReference = null;
StringBuffer linkText = null;
// Figure out relative reference if required.
String ref = "";
if (currentElement.compareTo("class") == 0 ||
currentElement.compareTo("interface") == 0) {
ref = pkg.name_ + "." + cls.name_ + ".";
} else if (currentElement.compareTo("package") == 0) {
ref = pkg.name_ + ".";
}
ref = ref.replace('.', '/');
for (int i=0; i < text.length(); i++) {
char c = text.charAt(i);
char nextChar = i < text.length()-1 ? text.charAt(i+1) : (char)-1;
int remainingChars = text.length() - i;
switch (state) {
case NORMAL_TEXT:
if (c == '{' && remainingChars >= 6) {
if ("{@link".equals(text.substring(i, i + 6))) {
state = IN_LINK;
identifier = null;
identifierReference = null;
linkText = null;
i += 5;
continue;
}
}
result.append(c);
break;
case IN_LINK:
if (Character.isWhitespace(nextChar)) continue;
if (nextChar == '}') {
// End of the link
state = END_OF_LINK;
} else if (!Character.isWhitespace(nextChar)) {
state = IN_LINK_IDENTIFIER;
}
break;
case IN_LINK_IDENTIFIER:
if (identifier == null) {
identifier = new StringBuffer();
}
if (c == '#') {
// We have a reference.
state = IN_LINK_IDENTIFIER_REFERENCE;
// Don't append #
continue;
} else if (Character.isWhitespace(c)) {
// We hit some whitespace: the next character is the beginning
// of the link text.
state = IN_LINK_LINKTEXT;
continue;
}
identifier.append(c);
// Check for a } that ends the link.
if (nextChar == '}') {
state = END_OF_LINK;
}
break;
case IN_LINK_IDENTIFIER_REFERENCE:
if (identifierReference == null) {
identifierReference = new StringBuffer();
}
if (Character.isWhitespace(c)) {
state = IN_LINK_LINKTEXT;
continue;
}
identifierReference.append(c);
if (c == '(') {
state = IN_LINK_IDENTIFIER_REFERENCE_PARAMS;
}
if (nextChar == '}') {
state = END_OF_LINK;
}
break;
case IN_LINK_IDENTIFIER_REFERENCE_PARAMS:
// We're inside the parameters of a reference. Spaces are allowed.
if (c == ')') {
state = IN_LINK_IDENTIFIER_REFERENCE;
}
identifierReference.append(c);
if (nextChar == '}') {
state = END_OF_LINK;
}
break;
case IN_LINK_LINKTEXT:
if (linkText == null) linkText = new StringBuffer();
linkText.append(c);
if (nextChar == '}') {
state = END_OF_LINK;
}
break;
case END_OF_LINK:
if (identifier != null) {
result.append("<A HREF=\"");
result.append(HTMLReportGenerator.newDocPrefix);
result.append(ref);
result.append(identifier.toString().replace('.', '/'));
result.append(".html");
if (identifierReference != null) {
result.append("#");
result.append(identifierReference);
}
result.append("\">"); // target=_top?
result.append("<TT>");
if (linkText != null) {
result.append(linkText);
} else {
result.append(identifier);
if (identifierReference != null) {
result.append(".");
result.append(identifierReference);
}
}
result.append("</TT>");
result.append("</A>");
}
state = NORMAL_TEXT;
break;
}
}
return result.toString();
}
//
// Methods to write a Comments object out to a file.
//
/**
* Write the XML representation of comments to a file.
*
* @param outputFileName The name of the comments file.
* @param oldComments The old comments on the changed APIs.
* @param newComments The new comments on the changed APIs.
* @return true if no problems encountered
*/
public static boolean writeFile(String outputFileName,
Comments newComments) {
try {
FileOutputStream fos = new FileOutputStream(outputFileName);
outputFile = new PrintWriter(fos);
newComments.emitXMLHeader(outputFileName);
newComments.emitComments();
newComments.emitXMLFooter();
outputFile.close();
} catch(IOException e) {
System.out.println("IO Error while attempting to create " + outputFileName);
System.out.println("Error: "+ e.getMessage());
System.exit(1);
}
return true;
}
/**
* Write the Comments object out in XML.
*/
public void emitComments() {
Iterator iter = commentsList_.iterator();
while (iter.hasNext()) {
SingleComment currComment = (SingleComment)(iter.next());
if (!currComment.isUsed_)
outputFile.println("<!-- This comment is no longer used ");
outputFile.println("<comment>");
outputFile.println(" <identifier id=\"" + currComment.id_ + "\"/>");
outputFile.println(" <text>");
outputFile.println(" " + currComment.text_);
outputFile.println(" </text>");
outputFile.println("</comment>");
if (!currComment.isUsed_)
outputFile.println("-->");
}
}
/**
* Dump the contents of a Comments object out for inspection.
*/
public void dump() {
Iterator iter = commentsList_.iterator();
int i = 0;
while (iter.hasNext()) {
i++;
SingleComment currComment = (SingleComment)(iter.next());
System.out.println("Comment " + i);
System.out.println("id = " + currComment.id_);
System.out.println("text = \"" + currComment.text_ + "\"");
System.out.println("isUsed = " + currComment.isUsed_);
}
}
/**
* Emit messages about which comments are now unused and which are new.
*/
public static void noteDifferences(Comments oldComments, Comments newComments) {
if (oldComments == null) {
System.out.println("Note: all the comments have been newly generated");
return;
}
// See which comment ids are no longer used and add those entries to
// the new comments, marking them as unused.
Iterator iter = oldComments.commentsList_.iterator();
while (iter.hasNext()) {
SingleComment oldComment = (SingleComment)(iter.next());
int idx = Collections.binarySearch(newComments.commentsList_, oldComment);
if (idx < 0) {
System.out.println("Warning: comment \"" + oldComment.id_ + "\" is no longer used.");
oldComment.isUsed_ = false;
newComments.commentsList_.add(oldComment);
}
}
}
/**
* Emit the XML header.
*/
public void emitXMLHeader(String filename) {
outputFile.println("<?xml version=\"1.0\" encoding=\"iso-8859-1\" standalone=\"no\"?>");
outputFile.println("<comments");
outputFile.println(" xmlns:xsi='" + RootDocToXML.baseURI + "/2001/XMLSchema-instance'");
outputFile.println(" xsi:noNamespaceSchemaLocation='comments.xsd'");
// Extract the identifier from the filename by removing the suffix
int idx = filename.lastIndexOf('.');
String apiIdentifier = filename.substring(0, idx);
// Also remove the output directory and directory separator if present
if (HTMLReportGenerator.outputDir != null)
apiIdentifier = apiIdentifier.substring(HTMLReportGenerator.outputDir.length()+1);
// Also remove "user_comments_for_"
apiIdentifier = apiIdentifier.substring(18);
outputFile.println(" name=\"" + apiIdentifier + "\"");
outputFile.println(" jdversion=\"" + JDiff.version + "\">");
outputFile.println();
outputFile.println("<!-- This file contains comments for a JDiff report. -->");
outputFile.println("<!-- It is used only in generating the report, and does not need to ship with the final report. -->");
outputFile.println();
outputFile.println("<!-- The id attribute in an identifier element identifies the change as noted in the report. -->");
outputFile.println("<!-- An id has the form package[.class[.[ctor|method|field].signature]], where [] indicates optional text. -->");
outputFile.println("<!-- A comment element can have multiple identifier elements, which will -->");
outputFile.println("<!-- will cause the same text to appear at each place in the report, but -->");
outputFile.println("<!-- will be converted to separate comments when the comments file is used. -->");
outputFile.println("<!-- HTML tags in the text field will appear in the report. -->");
outputFile.println("<!-- You also need to close p HTML elements, used for paragraphs - see the top-level documentation. -->");
}
/**
* Emit the XML footer.
*/
public void emitXMLFooter() {
outputFile.println();
outputFile.println("</comments>");
}
private static List oldAPIList = null;
private static List newAPIList = null;
/**
* Return true if the given HTML tag has no separate </tag> end element.
*
* If you want to be able to use sloppy HTML in your comments, then you can
* add the element, e.g. li back into the condition here. However, if you
* then become more careful and do provide the closing tag, the output is
* generally just the closing tag, which is incorrect.
*
* tag.equalsIgnoreCase("tr") || // Is sometimes minimized
* tag.equalsIgnoreCase("th") || // Is sometimes minimized
* tag.equalsIgnoreCase("td") || // Is sometimes minimized
* tag.equalsIgnoreCase("dt") || // Is sometimes minimized
* tag.equalsIgnoreCase("dd") || // Is sometimes minimized
* tag.equalsIgnoreCase("img") || // Is sometimes minimized
* tag.equalsIgnoreCase("code") || // Is sometimes minimized (error)
* tag.equalsIgnoreCase("font") || // Is sometimes minimized (error)
* tag.equalsIgnoreCase("ul") || // Is sometimes minimized
* tag.equalsIgnoreCase("ol") || // Is sometimes minimized
* tag.equalsIgnoreCase("li") // Is sometimes minimized
*/
public static boolean isMinimizedTag(String tag) {
if (tag.equalsIgnoreCase("p") ||
tag.equalsIgnoreCase("br") ||
tag.equalsIgnoreCase("hr")
) {
return true;
}
return false;
}
/**
* The file where the XML representing the new Comments object is stored.
*/
private static PrintWriter outputFile = null;
}