jdk.javadoc.internal.doclets.toolkit.util.DocFile Maven / Gradle / Ivy
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package jdk.javadoc.internal.doclets.toolkit.util;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.UnsupportedEncodingException;
import java.io.Writer;
import java.nio.file.Path;
import java.util.MissingResourceException;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import javax.tools.DocumentationTool;
import javax.tools.FileObject;
import javax.tools.JavaFileManager.Location;
import javax.tools.StandardLocation;
import jdk.javadoc.internal.doclets.toolkit.BaseConfiguration;
import jdk.javadoc.internal.doclets.toolkit.Resources;
/**
* Abstraction for handling files, which may be specified directly
* (e.g. via a path on the command line) or relative to a Location.
*/
public abstract class DocFile {
/**
* The line separator for the current platform.
* Use this when writing to external files.
*/
public static final String PLATFORM_LINE_SEPARATOR = System.getProperty("line.separator");
/** Create a DocFile for a directory. */
public static DocFile createFileForDirectory(BaseConfiguration configuration, String file) {
return DocFileFactory.getFactory(configuration).createFileForDirectory(file);
}
/** Create a DocFile for a file that will be opened for reading. */
public static DocFile createFileForInput(BaseConfiguration configuration, String file) {
return DocFileFactory.getFactory(configuration).createFileForInput(file);
}
/** Create a DocFile for a file that will be opened for reading. */
public static DocFile createFileForInput(BaseConfiguration configuration, Path file) {
return DocFileFactory.getFactory(configuration).createFileForInput(file);
}
/** Create a DocFile for a file that will be opened for writing. */
public static DocFile createFileForOutput(BaseConfiguration configuration, DocPath path) {
return DocFileFactory.getFactory(configuration).createFileForOutput(path);
}
/**
* The location for this file. Maybe null if the file was created without
* a location or path.
*/
protected final Location location;
/**
* The path relative to the (output) location. Maybe null if the file was
* created without a location or path.
*/
protected final DocPath path;
/**
* List the directories and files found in subdirectories along the
* elements of the given location.
* @param configuration the doclet configuration
* @param location currently, only {@link StandardLocation#SOURCE_PATH} is supported.
* @param path the subdirectory of the directories of the location for which to
* list files
*/
public static Iterable list(BaseConfiguration configuration, Location location, DocPath path) {
return DocFileFactory.getFactory(configuration).list(location, path);
}
/** Create a DocFile without a location or path */
protected DocFile() {
this.location = null;
this.path = null;
}
/** Create a DocFile for a given location and relative path. */
protected DocFile(Location location, DocPath path) {
this.location = location;
this.path = path;
}
/**
* Returns a file object for the file.
* @return a file object
*/
public abstract FileObject getFileObject();
/**
* Open an input stream for the file.
*
* @return an open input stream for the file
* @throws DocFileIOException if there is a problem opening the stream
*/
public abstract InputStream openInputStream() throws DocFileIOException;
/**
* Open an output stream for the file.
* The file must have been created with a location of
* {@link DocumentationTool.Location#DOCUMENTATION_OUTPUT}
* and a corresponding relative path.
*
* @return an open output stream for the file
* @throws DocFileIOException if there is a problem opening the stream
* @throws UnsupportedEncodingException if the configured encoding is not supported
*/
public abstract OutputStream openOutputStream() throws DocFileIOException, UnsupportedEncodingException;
/**
* Open an writer for the file, using the encoding (if any) given in the
* doclet configuration.
* The file must have been created with a location of
* {@link DocumentationTool.Location#DOCUMENTATION_OUTPUT} and a corresponding relative path.
*
* @return an open output stream for the file
* @throws DocFileIOException if there is a problem opening the stream
* @throws UnsupportedEncodingException if the configured encoding is not supported
*/
public abstract Writer openWriter() throws DocFileIOException, UnsupportedEncodingException;
/**
* Copy the contents of another file directly to this file.
*
* @param fromFile the file to be copied
* @throws DocFileIOException if there is a problem file copying the file
*/
public void copyFile(DocFile fromFile) throws DocFileIOException {
try (OutputStream output = openOutputStream()) {
try (InputStream input = fromFile.openInputStream()) {
byte[] bytearr = new byte[1024];
int len;
while ((len = read(fromFile, input, bytearr)) != -1) {
write(this, output, bytearr, len);
}
} catch (IOException e) {
throw new DocFileIOException(fromFile, DocFileIOException.Mode.READ, e);
}
} catch (IOException e) {
throw new DocFileIOException(this, DocFileIOException.Mode.WRITE, e);
}
}
/**
* Copy the contents of a resource file to this file.
*
* @param resource the path of the resource, relative to the package of this class
* @param overwrite whether or not to overwrite the file if it already exists
* @param replaceNewLine if false, the file is copied as a binary file;
* if true, the file is written line by line, using the platform line
* separator
*
* @throws DocFileIOException if there is a problem while writing the copy
* @throws ResourceIOException if there is a problem while reading the resource
*/
public void copyResource(DocPath resource, boolean overwrite, boolean replaceNewLine)
throws DocFileIOException, ResourceIOException {
if (exists() && !overwrite)
return;
copyResource(resource, replaceNewLine, null);
}
/**
* Copy the contents of a resource file to this file.
*
* @param resource the path of the resource, relative to the package of this class
* @param resources if not {@code null}, substitute occurrences of {@code ##REPLACE:key##}
*
* @throws DocFileIOException if there is a problem while writing the copy
* @throws ResourceIOException if there is a problem while reading the resource
*/
public void copyResource(DocPath resource, Resources resources) throws DocFileIOException, ResourceIOException {
copyResource(resource, true, resources);
}
private void copyResource(DocPath resource, boolean replaceNewLine, Resources resources)
throws DocFileIOException, ResourceIOException {
try {
InputStream in = BaseConfiguration.class.getResourceAsStream(resource.getPath());
if (in == null)
return;
try {
if (replaceNewLine) {
try (BufferedReader reader = new BufferedReader(new InputStreamReader(in))) {
try (Writer writer = openWriter()) {
String line;
while ((line = readResourceLine(resource, reader)) != null) {
write(this, writer, resources == null ? line : localize(line, resources));
write(this, writer, PLATFORM_LINE_SEPARATOR);
}
} catch (IOException e) {
throw new DocFileIOException(this, DocFileIOException.Mode.WRITE, e);
}
}
} else {
try (OutputStream out = openOutputStream()) {
byte[] buf = new byte[2048];
int n;
while ((n = readResource(resource, in, buf)) > 0) {
write(this, out, buf, n);
}
} catch (IOException e) {
throw new DocFileIOException(this, DocFileIOException.Mode.WRITE, e);
}
}
} finally {
in.close();
}
} catch (IOException e) {
throw new ResourceIOException(resource, e);
}
}
private static final Pattern replacePtn = Pattern.compile("##REPLACE:(?[A-Za-z0-9._]+)##");
private String localize(String line, Resources resources) {
Matcher m = replacePtn.matcher(line);
StringBuilder sb = null;
int start = 0;
while (m.find()) {
if (sb == null) {
sb = new StringBuilder();
}
sb.append(line, start, m.start());
try {
sb.append(resources.getText(m.group("key")));
} catch (MissingResourceException e) {
sb.append(m.group());
}
start = m.end();
}
if (sb == null) {
return line;
} else {
sb.append(line.substring(start));
return sb.toString();
}
}
/** Return true if the file can be read. */
public abstract boolean canRead();
/** Return true if the file can be written. */
public abstract boolean canWrite();
/** Return true if the file exists. */
public abstract boolean exists();
/** Return the base name (last component) of the file name. */
public abstract String getName();
/** Return the file system path for this file. */
public abstract String getPath();
/** Return true if file has an absolute path name. */
public abstract boolean isAbsolute();
/** Return true if file identifies a directory. */
public abstract boolean isDirectory();
/** Return true if file identifies a file. */
public abstract boolean isFile();
/** Return true if this file is the same as another. */
public abstract boolean isSameFile(DocFile other);
/** If the file is a directory, list its contents.
*
* @return the contents of the directory
* @throws DocFileIOException if there is a problem while listing the directory
*/
public abstract Iterable list() throws DocFileIOException;
/** Create the file as a directory, including any parent directories. */
public abstract boolean mkdirs();
/**
* Derive a new file by resolving a relative path against this file.
* The new file will inherit the configuration and location of this file
* If this file has a path set, the new file will have a corresponding
* new path.
*/
public abstract DocFile resolve(DocPath p);
/**
* Derive a new file by resolving a relative path against this file.
* The new file will inherit the configuration and location of this file
* If this file has a path set, the new file will have a corresponding
* new path.
*/
public abstract DocFile resolve(String p);
/**
* Resolve a relative file against the given output location.
* @param locn Currently, only
* {@link DocumentationTool.Location#DOCUMENTATION_OUTPUT} is supported.
*/
public abstract DocFile resolveAgainst(Location locn);
/**
* Reads from an input stream opened from a given file into a given buffer.
* If an {@code IOException} occurs, it is wrapped in a {@code DocFileIOException}.
*
* @param inFile the file for the stream
* @param input the stream
* @param buf the buffer
*
* @return the number of bytes read, or -1 if at end of file
* @throws DocFileIOException if an exception occurred while reading the stream
*/
private static int read(DocFile inFile, InputStream input, byte[] buf) throws DocFileIOException {
try {
return input.read(buf);
} catch (IOException e) {
throw new DocFileIOException(inFile, DocFileIOException.Mode.READ, e);
}
}
/**
* Writes to an output stream for a given file from a given buffer.
* If an {@code IOException} occurs, it is wrapped in a {@code DocFileIOException}.
*
* @param outFile the file for the stream
* @param out the stream
* @param buf the buffer
*
* @throws DocFileIOException if an exception occurred while writing the stream
*/
private static void write(DocFile outFile, OutputStream out, byte[] buf, int len) throws DocFileIOException {
try {
out.write(buf, 0, len);
} catch (IOException e) {
throw new DocFileIOException(outFile, DocFileIOException.Mode.WRITE, e);
}
}
/**
* Writes text to an output stream for a given file from a given buffer.
* If an {@code IOException} occurs, it is wrapped in a {@code DocFileIOException}.
*
* @param outFile the file for the stream
* @param out the stream
* @param text the text to be written
*
* @throws DocFileIOException if an exception occurred while writing the stream
*/
private static void write(DocFile outFile, Writer out, String text) throws DocFileIOException {
try {
out.write(text);
} catch (IOException e) {
throw new DocFileIOException(outFile, DocFileIOException.Mode.WRITE, e);
}
}
/**
* Reads from an input stream opened from a given resource into a given buffer.
* If an {@code IOException} occurs, it is wrapped in a {@code ResourceIOException}.
*
* @param docPath the resource for the stream
* @param in the stream
* @param buf the buffer
*
* @return the number of bytes read, or -1 if at end of file
* @throws ResourceIOException if an exception occurred while reading the stream
*/
private static int readResource(DocPath docPath, InputStream in, byte[] buf) throws ResourceIOException {
try {
return in.read(buf);
} catch (IOException e) {
throw new ResourceIOException(docPath, e);
}
}
/**
* Reads a line of characters from an input stream opened from a given resource.
* If an {@code IOException} occurs, it is wrapped in a {@code ResourceIOException}.
*
* @param docPath the resource for the stream
* @param in the stream
*
* @return the line of text, or {@code null} if at end of stream
* @throws ResourceIOException if an exception occurred while reading the stream
*/
private static String readResourceLine(DocPath docPath, BufferedReader in) throws ResourceIOException {
try {
return in.readLine();
} catch (IOException e) {
throw new ResourceIOException(docPath, e);
}
}
}
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