Examples with INameEnvironment org.eclipse.jdt.internal.compiler.env.INameEnvironment used on opensource projects

Example 11 with INameEnvironment

use of org.eclipse.jdt.internal.compiler.env.INameEnvironment in project drools by kiegroup.

the class EclipseJavaCompiler method compile.

public CompilationResult compile(final String[] pSourceFiles, final ResourceReader pReader, final ResourceStore pStore, final ClassLoader pClassLoader, final JavaCompilerSettings pSettings) {
    final Collection problems = new ArrayList();
    final ICompilationUnit[] compilationUnits = new ICompilationUnit[pSourceFiles.length];
    for (int i = 0; i < compilationUnits.length; i++) {
        final KiePath sourceFile = KiePath.of(pSourceFiles[i]);
        if (pReader.isAvailable(sourceFile)) {
            compilationUnits[i] = new CompilationUnit(pReader, sourceFile.asString());
        } else {
            // log.error("source not found " + sourceFile);
            final CompilationProblem problem = new CompilationProblem() {

                public int getEndColumn() {
                    return 0;
                }

                public int getEndLine() {
                    return 0;
                }

                public String getFileName() {
                    return sourceFile.asString();
                }

                public String getMessage() {
                    return "Source " + sourceFile.asString() + " could not be found";
                }

                public int getStartColumn() {
                    return 0;
                }

                public int getStartLine() {
                    return 0;
                }

                public boolean isError() {
                    return true;
                }

                public String toString() {
                    return getMessage();
                }
            };
            problems.add(problem);
        }
    }
    if (problems.size() > 0) {
        final CompilationProblem[] result = new CompilationProblem[problems.size()];
        problems.toArray(result);
        return new CompilationResult(result);
    }
    final IErrorHandlingPolicy policy = DefaultErrorHandlingPolicies.proceedWithAllProblems();
    final IProblemFactory problemFactory = new DefaultProblemFactory(Locale.getDefault());
    final INameEnvironment nameEnvironment = new INameEnvironment() {

        public NameEnvironmentAnswer findType(final char[][] pCompoundTypeName) {
            final StringBuilder result = new StringBuilder();
            for (int i = 0; i < pCompoundTypeName.length; i++) {
                if (i != 0) {
                    result.append('.');
                }
                result.append(pCompoundTypeName[i]);
            }
            return findType(result.toString());
        }

        public NameEnvironmentAnswer findType(final char[] pTypeName, final char[][] pPackageName) {
            final StringBuilder result = new StringBuilder();
            for (char[] chars : pPackageName) {
                result.append(chars);
                result.append('.');
            }
            result.append(pTypeName);
            return findType(result.toString());
        }

        private NameEnvironmentAnswer findType(final String pClazzName) {
            final String resourceName = ClassUtils.convertClassToResourcePath(pClazzName);
            final byte[] clazzBytes = pStore.read(resourceName);
            if (clazzBytes != null) {
                try {
                    return createNameEnvironmentAnswer(pClazzName, clazzBytes);
                } catch (final ClassFormatException e) {
                    throw new RuntimeException("ClassFormatException in loading class '" + pClazzName + "' with JCI.");
                }
            }
            try (InputStream is = pClassLoader.getResourceAsStream(resourceName)) {
                if (is == null) {
                    return null;
                }
                if (ClassUtils.isCaseSenstiveOS()) {
                    // check it really is a class, this issue is due to windows case sensitivity issues for the class org.kie.Process and path org/droosl/process
                    try {
                        pClassLoader.loadClass(pClazzName);
                    } catch (ClassNotFoundException | NoClassDefFoundError e) {
                        return null;
                    }
                }
                final byte[] buffer = new byte[8192];
                try (ByteArrayOutputStream baos = new ByteArrayOutputStream(buffer.length)) {
                    int count;
                    while ((count = is.read(buffer, 0, buffer.length)) > 0) {
                        baos.write(buffer, 0, count);
                    }
                    baos.flush();
                    return createNameEnvironmentAnswer(pClazzName, baos.toByteArray());
                }
            } catch (final IOException e) {
                throw new RuntimeException("could not read class", e);
            } catch (final ClassFormatException e) {
                throw new RuntimeException("wrong class format", e);
            }
        }

        private NameEnvironmentAnswer createNameEnvironmentAnswer(final String pClazzName, final byte[] clazzBytes) throws ClassFormatException {
            final char[] fileName = pClazzName.toCharArray();
            final ClassFileReader classFileReader = new ClassFileReader(clazzBytes, fileName, true);
            return new NameEnvironmentAnswer(classFileReader, null);
        }

        private boolean isSourceAvailable(final String pClazzName, final ResourceReader pReader) {
            // FIXME: this should not be tied to the extension
            final String javaSource = pClazzName.replace('.', '/') + ".java";
            final String classSource = pClazzName.replace('.', '/') + ".class";
            return pReader.isAvailable(sourceFolder + javaSource) || pReader.isAvailable(sourceFolder + classSource);
        }

        private boolean isPackage(final String pClazzName) {
            try (InputStream is = pClassLoader.getResourceAsStream(ClassUtils.convertClassToResourcePath(pClazzName))) {
                if (is != null) {
                    if (ClassUtils.isWindows() || ClassUtils.isOSX()) {
                        try {
                            Class cls = pClassLoader.loadClass(pClazzName);
                            if (cls != null) {
                                return false;
                            }
                        } catch (ClassNotFoundException | NoClassDefFoundError e) {
                            return true;
                        }
                    }
                }
                return is == null && !isSourceAvailable(pClazzName, pReader);
            } catch (IOException e) {
                throw new RuntimeException("Cannot open or close resource stream!", e);
            }
        }

        public boolean isPackage(char[][] parentPackageName, char[] pPackageName) {
            final StringBuilder result = new StringBuilder();
            if (parentPackageName != null) {
                for (int i = 0; i < parentPackageName.length; i++) {
                    if (i != 0) {
                        result.append('.');
                    }
                    result.append(parentPackageName[i]);
                }
            }
            if (parentPackageName != null && parentPackageName.length > 0) {
                result.append('.');
            }
            result.append(pPackageName);
            return isPackage(result.toString());
        }

        public void cleanup() {
        }
    };
    final ICompilerRequestor compilerRequestor = pResult -> {
        if (pResult.hasProblems()) {
            final IProblem[] iproblems = pResult.getProblems();
            for (final IProblem iproblem : iproblems) {
                final CompilationProblem problem = new EclipseCompilationProblem(iproblem);
                problems.add(problem);
            }
        }
        if (!pResult.hasErrors()) {
            final ClassFile[] clazzFiles = pResult.getClassFiles();
            for (final ClassFile clazzFile : clazzFiles) {
                final char[][] compoundName = clazzFile.getCompoundName();
                final StringBuilder clazzName = new StringBuilder();
                for (int j = 0; j < compoundName.length; j++) {
                    if (j != 0) {
                        clazzName.append('.');
                    }
                    clazzName.append(compoundName[j]);
                }
                pStore.write(clazzName.toString().replace('.', '/') + ".class", clazzFile.getBytes());
            }
        }
    };
    final Map settingsMap = new EclipseJavaCompilerSettings(pSettings).toNativeSettings();
    CompilerOptions compilerOptions = new CompilerOptions(settingsMap);
    compilerOptions.parseLiteralExpressionsAsConstants = false;
    final Compiler compiler = new Compiler(nameEnvironment, policy, compilerOptions, compilerRequestor, problemFactory);
    if (ClassBuilderFactory.DUMP_GENERATED_CLASSES) {
        dumpUnits(compilationUnits, pReader);
    }
    compiler.compile(compilationUnits);
    final CompilationProblem[] result = new CompilationProblem[problems.size()];
    problems.toArray(result);
    return new CompilationResult(result);
}