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eFaps is a framework used to map objects with or without attached files to
a relational database and optional file systems (only for attaches files). Configurable access control can be provided down to object and attribute level depending on implementation and use case. Depending on requirements, events (like triggers) allow to implement business logic and to separate business logic from user interface.
The framework includes integrations (e.g. webdav, full text search) and a web application as 'simple' configurable user interface. Some best practises, example web application modules (e.g. team work module) support administrators and implementers using this framework.
/*
* Copyright 2003 - 2011 The eFaps Team
*
* 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.
*
* Revision: $Rev: 6210 $
* Last Changed: $Date: 2011-02-18 16:02:56 -0500 (Fri, 18 Feb 2011) $
* Last Changed By: $Author: [email protected] $
*/
package org.efaps.update.schema.program.esjp;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.Writer;
import java.net.URI;
import java.net.URISyntaxException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.regex.Matcher;
import javax.tools.FileObject;
import javax.tools.ForwardingJavaFileManager;
import javax.tools.JavaCompiler;
import javax.tools.JavaFileManager;
import javax.tools.JavaFileObject;
import javax.tools.SimpleJavaFileObject;
import javax.tools.StandardJavaFileManager;
import javax.tools.StandardLocation;
import javax.tools.ToolProvider;
import org.efaps.admin.datamodel.Type;
import org.efaps.ci.CIAdminProgram;
import org.efaps.db.Checkin;
import org.efaps.db.Checkout;
import org.efaps.db.Delete;
import org.efaps.db.Insert;
import org.efaps.db.Instance;
import org.efaps.db.MultiPrintQuery;
import org.efaps.db.QueryBuilder;
import org.efaps.update.util.InstallationException;
import org.efaps.util.EFapsException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* The class is used to compile all checked in ESJP programs. Because the
* dependencies of a class are not known, all ESJP programs stored in eFaps are
* compiled.
*
* @author The eFaps Team
* @version $Id: ESJPCompiler.java 6210 2011-02-18 21:02:56Z [email protected] $
*/
public class ESJPCompiler
{
/**
* Logging instance used in this class.
*/
private static final Logger LOG = LoggerFactory.getLogger(ESJPCompiler.class);
/**
* Type instance of Java program.
*/
private final Type esjpType;
/**
* Type instance of compile EJSP program.
*/
private final Type classType;
/**
* Mapping between ESJP name and the related ESJP source object.
*
* @see #readESJPPrograms()
*/
private final Map name2Source = new HashMap();
/**
* Mapping between already existing compiled ESJP class name and the
* related eFaps id in the database.
*
* @see #readESJPClasses()
*/
private final Map class2id = new HashMap();
/**
* Mapping between the class name and the related ESJP class which must be
* stored.
*
* @see StoreObject
*/
private final Map classFiles
= new HashMap();
/**
* Stores the list of class path needed to compile (if needed).
*/
private final List classPathElements;
/**
* The constructor initialize the two type instances {@link #esjpType} and
* {@link #classType}.
*
* @param _classPathElements list of class path elements
* @see #esjpType
* @see #classType
*/
public ESJPCompiler(final List _classPathElements)
{
this.esjpType = CIAdminProgram.Java.getType();
this.classType = CIAdminProgram.JavaClass.getType();
this.classPathElements = _classPathElements;
}
/**
* All stored ESJP programs in eFaps are compiled. The system Java compiler
* defined from the {@link ToolProvider tool provider} is used for the
* compiler. All old not needed compiled Java classes are automatically
* removed. The compiler error and warning are logged (errors are using
* error-level, warnings are using info-level).
* Debug:
*
* null: By default, only line number and source file information is generated."none": Do not generate any debugging information- Generate only some kinds of debugging information, specified by a comma separated
* list of keywords. Valid keywords are:
*
* "source": Source file debugging information"lines": Line number debugging information"vars": Local variable debugging information
*
*
*
* @param _debug String for the debug option
* @param _addRuntimeClassPath Must the classpath from the runtime added
* to the compiler, default: false
* @throws InstallationException if the compile failed
*/
public void compile(final String _debug,
final boolean _addRuntimeClassPath)
throws InstallationException
{
readESJPPrograms();
readESJPClasses();
final JavaCompiler compiler = ToolProvider.getSystemJavaCompiler();
if (compiler == null) {
ESJPCompiler.LOG.error("no compiler found for compiler !");
} else {
// output of used compiler
if (ESJPCompiler.LOG.isInfoEnabled()) {
ESJPCompiler.LOG.info(" Using compiler " + compiler.toString());
}
// options for the compiler
final List optionList = new ArrayList();
// set classpath!
// (the list of programs to compile is given to the javac as
// argument array, so the class path could be set in front of the
// programs to compile)
if (this.classPathElements != null) {
// different class path separators depending on the OS
final String sep = System.getProperty("os.name").startsWith("Windows") ? ";" : ":";
final StringBuilder classPath = new StringBuilder();
for (final String classPathElement : this.classPathElements) {
classPath.append(classPathElement).append(sep);
}
if (_addRuntimeClassPath) {
classPath.append(System.getProperty("java.class.path"));
}
optionList.addAll(Arrays.asList("-classpath", classPath.toString()));
} else {
// set compiler's class path to be same as the runtime's
optionList.addAll(Arrays.asList("-classpath", System.getProperty("java.class.path")));
}
//Set the source file encoding name, such as EUCJIS/SJIS. If -encoding is not specified,
//the platform default converter is used.
optionList.addAll(Arrays.asList("-encoding", "UTF-8"));
if (_debug != null) {
optionList.addAll(Arrays.asList("-g", _debug));
}
// logging of compiling classes
if (ESJPCompiler.LOG.isInfoEnabled()) {
for (final SourceObject obj : this.name2Source.values()) {
ESJPCompiler.LOG.info(" Compiling ESJP '" + obj.javaName + "'");
}
}
final FileManager fm = new FileManager(compiler.getStandardFileManager(null, null, null));
final boolean noErrors = compiler.getTask(new ErrorWriter(),
fm,
null,
optionList,
null,
this.name2Source.values())
.call();
if (!noErrors) {
throw new InstallationException("error");
}
// store all compiled ESJP's
for (final ESJPCompiler.StoreObject obj : this.classFiles.values()) {
obj.write();
}
// delete not needed compiled ESJP classes
for (final Long id : this.class2id.values()) {
try {
(new Delete(this.classType, id)).executeWithoutAccessCheck();
} catch (final EFapsException e) {
throw new InstallationException("Could not delete ESJP class with id " + id, e);
}
}
}
}
/**
* All EJSP programs in the eFaps database are read and stored in the
* mapping {@link #name2Source} for further using.
*
* @see #name2Source
* @throws InstallationException if ESJP Java programs could not be read
*/
protected void readESJPPrograms()
throws InstallationException
{
try {
final QueryBuilder queryBldr = new QueryBuilder(this.esjpType);
final MultiPrintQuery multi = queryBldr.getPrint();
multi.addAttribute("Name");
multi.executeWithoutAccessCheck();
while (multi.next()) {
final String name = multi.getAttribute("Name");
final Long id = multi.getCurrentInstance().getId();
final File file = new File(File.separator,
name.replaceAll("\\.", Matcher.quoteReplacement(File.separator))
+ JavaFileObject.Kind.SOURCE.extension);
final URI uri;
try {
uri = new URI("efaps", null, file.getAbsolutePath(), null, null);
} catch (final URISyntaxException e) {
throw new InstallationException("Could not create an URI for " + file, e);
}
this.name2Source.put(name, new SourceObject(uri, name, id));
}
} catch (final EFapsException e) {
throw new InstallationException("Could not fetch the information about installed ESJP's", e);
}
}
/**
* All stored compiled ESJP's classes in the eFaps database are stored in
* the mapping {@link #class2id}. If a ESJP's program is compiled and
* stored with {@link ESJPCompiler.StoreObject#write()}, the class is
* removed. After the compile, {@link ESJPCompiler#compile(String)} removes
* all stored classes which are not needed anymore.
*
* @throws InstallationException if read of the ESJP classes failed
* @see #class2id
*/
protected void readESJPClasses()
throws InstallationException
{
try {
final QueryBuilder queryBldr = new QueryBuilder(this.classType);
final MultiPrintQuery multi = queryBldr.getPrint();
multi.addAttribute("Name");
multi.executeWithoutAccessCheck();
while (multi.next()) {
final String name = multi.getAttribute("Name");
final Long id = multi.getCurrentInstance().getId();
this.class2id.put(name, id);
}
} catch (final EFapsException e) {
throw new InstallationException("Could not fetch the information about compiled ESJP's", e);
}
}
/**
* Error writer to show all errors to the
* {@link ESJPCompiler#LOG compiler logger}.
*/
private final class ErrorWriter
extends Writer
{
/**
* Stub method because only required to derive from {@link Writer}.
*/
@Override
public void close()
{
}
/**
* Stub method because only required to derive from {@link Writer}.
*/
@Override
public void flush()
{
}
/**
* Writes given message to the error log of the compiler.
*
* @param _cbuf buffer with the message
* @param _off offset within the buffer
* @param _len len of the message within the buffer
*/
@Override
public void write(final char[] _cbuf,
final int _off,
final int _len)
{
final String msg = new StringBuilder().append(_cbuf, _off, _len).toString().trim();
if (!"".equals(msg)) {
for (final String line : msg.split("\n")) {
ESJPCompiler.LOG.error(line);
}
}
}
}
/**
* ESJP file manager to handle the compiled ESJP classes.
*/
private final class FileManager
extends ForwardingJavaFileManager
{
/**
* Defined the forwarding Java file manager.
*
* @param _sfm original Java file manager to forward
*/
public FileManager(final StandardJavaFileManager _sfm)
{
super(_sfm);
}
/**
* The method returns always null to be sure the no file
* is written.
*
* @param _location location for which the file output is searched
* @param _packageName name of the package
* @param _relativeName relative name
* @param _fileObject file object to be used as hint for placement
* @return always null
*/
@Override
public FileObject getFileForOutput(final Location _location,
final String _packageName,
final String _relativeName,
final FileObject _fileObject)
{
return null;
}
/**
* Returns the related Java file object used from the Java compiler to
* store the compiled ESJP.
*
* @param _location location (not used)
* @param _className name of the ESJP class
* @param _kind kind of the source (not used)
* @param _fileObject file object to update (used to get the URI)
* @return Java file object for ESJP used to store the compiled class
* @see ESJPCompiler
*/
@Override
public JavaFileObject getJavaFileForOutput(final Location _location,
final String _className,
final JavaFileObject.Kind _kind,
final FileObject _fileObject)
{
final ESJPCompiler.StoreObject ret = new ESJPCompiler.StoreObject(_fileObject.toUri(), _className);
ESJPCompiler.this.classFiles.put(_className, ret);
return ret;
}
/**
* Checks if given _location is handled by this Java file
* manager.
*
* @param _location location to prove
* @return true if the _location is the source path or
* the forwarding standard Java file manager handles the
* _location; otherwise false
*/
@Override
public boolean hasLocation(final JavaFileManager.Location _location)
{
return StandardLocation.SOURCE_PATH.getName().equals(_location.getName()) || super.hasLocation(_location);
}
/**
* If the _location is the source path a dummy binary name
* for the ESJP class is returned. The dummy binary name is the name of
* the _javaFileObject and the extension for
* {@link JavaFileObject.Kind#CLASS Java classes}. If the
* _location is not the source path, the binary name from
* the forwarded
* {@link StandardJavaFileManager standard Java file manager} is
* returned.
*
* @param _location location
* @param _javaFileObject java file object
* @return name of the binary object for the ESJP or from forwarded
* {@link StandardJavaFileManager standard Java file manager}
*/
@Override
public String inferBinaryName(final JavaFileManager.Location _location,
final JavaFileObject _javaFileObject)
{
final String ret;
if (StandardLocation.SOURCE_PATH.getName().equals(_location.getName())) {
ret = new StringBuilder()
.append(_javaFileObject.getName())
.append(JavaFileObject.Kind.CLASS.extension)
.toString();
} else {
ret = super.inferBinaryName(_location, _javaFileObject);
}
return ret;
}
/**
* If the _location is the source path and the
* _kinds includes sources an investigation in the cached
* {@link ESJPCompiler#name2Source ESJP programs} is done and the list of
* ESJP's for given _packageName is returned.
* In all other case the list of found Java programs from the
* forwarded {@link StandardJavaFileManager standard Java file manager}
* is returned.
*
* @param _location location which must be investigated
* @param _packageName name of searched package
* @param _kinds kinds of file object
* @param _recurse must be searched recursive including sub
* packages (ignored, because not used)
* @return list of found ESJP programs for given
* _packageName or if not from source path the
* list of Java classes from forwarded standard Java file
* manager
* @throws IOException from forwarded standard Java file manager
*/
@Override
public Iterable list(final Location _location,
final String _packageName,
final Set _kinds,
final boolean _recurse)
throws IOException
{
final Iterable rt;
if (StandardLocation.SOURCE_PATH.getName().equals(_location.getName())
&& _kinds.contains(JavaFileObject.Kind.SOURCE)) {
final List pckObjs = new ArrayList();
final int pckLength = _packageName.length();
for (final Map.Entry entry
: ESJPCompiler.this.name2Source.entrySet()) {
if (entry.getKey().startsWith(_packageName)
&& (entry.getKey().substring(pckLength + 1).indexOf('.') < 0)) {
pckObjs.add(entry.getValue());
}
}
rt = pckObjs;
} else {
rt = super.list(_location, _packageName, _kinds, _recurse);
}
return rt;
}
}
/**
* Holds the information about the ESJP source program which must be
* compiled (and from which the source code is fetched).
*/
private final class SourceObject
extends SimpleJavaFileObject
{
/**
* Name of the ESJP program.
*/
private final String javaName;
/**
* Used internal id in eFaps.
*/
private final long id;
/**
* Initializes the source object.
*
* @param _uri URI of the ESJP
* @param _javaName Java name of the ESJP
* @param _id id used from eFaps within database
*/
private SourceObject(final URI _uri,
final String _javaName,
final long _id)
{
super(_uri, JavaFileObject.Kind.SOURCE);
this.javaName = _javaName;
this.id = _id;
}
/**
* Returns the char sequence of the ESJP source code.
*
* @param _ignoreEncodingErrors ignore encoding error (not used)
* @return source code from the ESJP
* @throws IOException if source could not be read from the eFaps
* database
*/
@Override
public CharSequence getCharContent(final boolean _ignoreEncodingErrors)
throws IOException
{
final StringBuilder ret = new StringBuilder();
try {
final Checkout checkout = new Checkout(Instance.get(ESJPCompiler.this.esjpType, this.id));
final InputStream is = checkout.executeWithoutAccessCheck();
final byte[] bytes = new byte[is.available()];
is.read(bytes);
is.close();
ret.append(new String(bytes));
} catch (final EFapsException e) {
throw new IOException("could not checkout class '" + this.javaName + "'", e);
}
return ret;
}
}
/**
* The class is used to store the result of a Java compilation.
*/
private final class StoreObject
extends SimpleJavaFileObject
{
/**
* Name of the class to compile.
*/
private final String className;
/**
* Byte array output stream to store the result of the compilation.
*
* @see #openOutputStream()
*/
private final ByteArrayOutputStream out = new ByteArrayOutputStream();
/**
* Initializes this store object.
*
* @param _uri URI of the class to store
* @param _className name of the class to store
*/
private StoreObject(final URI _uri,
final String _className)
{
super(_uri, JavaFileObject.Kind.CLASS);
this.className = _className;
}
/**
* Returns this {@link #out} which is used as buffer for the compiled
* ESJP {@link #className}.
*
* @return {@link #out} as output stream
* @see #out
*/
@Override
public OutputStream openOutputStream()
{
return this.out;
}
/**
* The compiled class in _resourceData is stored with the name
* _resourceName in the eFaps database (checked in). If the class
* instance already exists in eFaps, the class data is updated. Otherwise, the
* compiled class is new inserted in eFaps (related to the original Java
* program).
*/
public void write()
{
if (ESJPCompiler.LOG.isDebugEnabled()) {
ESJPCompiler.LOG.debug("write '" + this.className + "'");
}
try {
final Long id = ESJPCompiler.this.class2id.get(this.className);
Instance instance;
if (id == null) {
final String parent = this.className.replaceAll(".class$", "").replaceAll("\\$.*", "");
final ESJPCompiler.SourceObject parentId = ESJPCompiler.this.name2Source.get(parent);
final Insert insert = new Insert(ESJPCompiler.this.classType);
insert.add("Name", this.className);
insert.add("ProgramLink", "" + parentId.id);
insert.executeWithoutAccessCheck();
instance = insert.getInstance();
insert.close();
} else {
instance = Instance.get(ESJPCompiler.this.classType, id);
ESJPCompiler.this.class2id.remove(this.className);
}
final Checkin checkin = new Checkin(instance);
checkin.executeWithoutAccessCheck(this.className,
new ByteArrayInputStream(this.out.toByteArray()),
this.out.toByteArray().length);
} catch (final Exception e) {
ESJPCompiler.LOG.error("unable to write to eFaps ESJP class '" + this.className + "'", e);
}
}
}
}