Java Code Examples for org.eclipse.jdt.core.compiler.CharOperation#NO_CHAR

/**
 * Converts the given array of qualified name segments to a qualified name.
 * <p>
 * For example:
 * <pre>
 * <code>
 * toQualifiedName({{'j', 'a', 'v', 'a'}, {'l', 'a', 'n', 'g'}, {'O', 'b', 'j', 'e', 'c', 't'}}) -> {'j', 'a', 'v', 'a', '.', 'l', 'a', 'n', 'g', '.', 'O', 'b', 'j', 'e', 'c', 't'}
 * toQualifiedName({{'O', 'b', 'j', 'e', 'c', 't'}}) -> {'O', 'b', 'j', 'e', 'c', 't'}
 * toQualifiedName({{}}) -> {}
 * </code>
 * </pre>
 * </p>
 *
 * @param segments the list of name segments, possibly empty
 * @return the dot-separated qualified name, or the empty string
 *
 * @since 2.0
 */
public static char[] toQualifiedName(char[][] segments) {
	int length = segments.length;
	if (length == 0) return CharOperation.NO_CHAR;
	if (length == 1) return segments[0];

	int resultLength = 0;
	for (int i = 0; i < length; i++) {
		resultLength += segments[i].length+1;
	}
	resultLength--;
	char[] result = new char[resultLength];
	int index = 0;
	for (int i = 0; i < length; i++) {
		char[] segment = segments[i];
		int segmentLength = segment.length;
		System.arraycopy(segment, 0, result, index, segmentLength);
		index += segmentLength;
		if (i != length-1) {
			result[index++] = C_DOT;
		}
	}
	return result;
}
 

public final void setSource(char[] sourceString){
	//the source-buffer is set to sourceString

	int sourceLength;
	if (sourceString == null) {
		this.source = CharOperation.NO_CHAR;
		sourceLength = 0;
	} else {
		this.source = sourceString;
		sourceLength = sourceString.length;
	}
	this.startPosition = -1;
	this.eofPosition = sourceLength;
	this.initialPosition = this.currentPosition = 0;
	this.containsAssertKeyword = false;
	this.linePtr = -1;
}
 

public LexStream(int size, Scanner scanner, int[] intervalStartToSkip, int[] intervalEndToSkip, int[] intervalFlagsToSkip, int firstToken, int init, int eof) {
	this.tokenCache = new Token[size];
	this.tokenCacheIndex = 0;
	this.tokenCacheEOFIndex = Integer.MAX_VALUE;
	this.tokenCache[0] = new Token();
	this.tokenCache[0].kind = firstToken;
	this.tokenCache[0].name = CharOperation.NO_CHAR;
	this.tokenCache[0].start = init;
	this.tokenCache[0].end = init;
	this.tokenCache[0].line = 0;

	this.intervalStartToSkip = intervalStartToSkip;
	this.intervalEndToSkip = intervalEndToSkip;
	this.intervalFlagsToSkip = intervalFlagsToSkip;
	this.awaitingColonColon = false;
	scanner.resetTo(init, eof);
	this.scanner = scanner;
}
 

private void parseTypeVariable() {
	if (this.scanner.nextToken() != Scanner.TYPE) {
		malformedKey();
		return;
	}
	char[] typeVariableName = this.scanner.getTokenSource();
	char[] position;
	int length = typeVariableName.length;
	if (length > 0 && Character.isDigit(typeVariableName[0])) {
		int firstT = CharOperation.indexOf('T', typeVariableName);
		position = CharOperation.subarray(typeVariableName, 0, firstT);
		typeVariableName = CharOperation.subarray(typeVariableName, firstT+1, typeVariableName.length);
	} else {
		position = CharOperation.NO_CHAR;
	}
	consumeTypeVariable(position, typeVariableName);
	this.scanner.skipTypeEnd();
}
 

public char[] getContents() {
	char[] contents = (this.source == NO_SOURCE_FILE) ? null : this.source;
	if (this.source == null) {
		if (this.openable instanceof ClassFile) {
			String fileName = getSourceFileName();
			if (fileName == NO_SOURCE_FILE_NAME) return CharOperation.NO_CHAR;

			SourceMapper sourceMapper = this.openable.getSourceMapper();
			if (sourceMapper != null) {
				IType type = ((ClassFile) this.openable).getType();
				contents = sourceMapper.findSource(type, fileName);
			}
		} else {
			contents = this.document.getCharContents();
		}
		this.source = (contents == null) ? NO_SOURCE_FILE : contents;
	}
	return contents;
}
 

@Override
public Name getSimpleName() {
	char[][] compoundName = ((PackageBinding)_binding).compoundName;
	int length = compoundName.length;
	if (length == 0) {
		return new NameImpl(CharOperation.NO_CHAR);
	}
	return new NameImpl(compoundName[length - 1]);
}
 

LambdaExpression(JavaElement parent, String interphase, int sourceStart, int sourceEnd, int arrowPosition, LambdaMethod lambdaMethod) {
	super(parent, new String(CharOperation.NO_CHAR));
	this.sourceStart = sourceStart;
	this.sourceEnd = sourceEnd;
	this.arrowPosition = arrowPosition;
	this.interphase = interphase;
	this.elementInfo = makeTypeElementInfo(this, interphase, this.sourceStart = sourceStart, sourceEnd, arrowPosition);
	this.elementInfo.children = new IJavaElement[] { this.lambdaMethod = lambdaMethod };
}
 

LambdaExpression(JavaElement parent, String interphase, int sourceStart, int sourceEnd, int arrowPosition) {
	super(parent, new String(CharOperation.NO_CHAR));
	this.sourceStart = sourceStart;
	this.sourceEnd = sourceEnd;
	this.arrowPosition = arrowPosition;
	this.interphase = interphase;
	this.elementInfo = makeTypeElementInfo(this, interphase, this.sourceStart = sourceStart, sourceEnd, arrowPosition);
	// Method is in the process of being fabricated, will be attached shortly.
}
 

LambdaExpression(JavaElement parent, org.eclipse.jdt.internal.compiler.ast.LambdaExpression lambdaExpression) {
	super(parent, new String(CharOperation.NO_CHAR));
	this.sourceStart = lambdaExpression.sourceStart;
	this.sourceEnd = lambdaExpression.sourceEnd;
	this.arrowPosition = lambdaExpression.arrowPosition;
	this.interphase = new String(CharOperation.replaceOnCopy(lambdaExpression.resolvedType.genericTypeSignature(), '/', '.'));
	this.elementInfo = makeTypeElementInfo(this, this.interphase, this.sourceStart, this.sourceEnd, this.arrowPosition); 
	this.lambdaMethod = LambdaFactory.createLambdaMethod(this, lambdaExpression);
	this.elementInfo.children = new IJavaElement[] { this.lambdaMethod };
}
 

public char[] getContents() {
	if (this.contents != null)
		return this.contents;   // answer the cached source

	// otherwise retrieve it
	try {
		return Util.getFileCharContent(new File(new String(this.fileName)), this.encoding);
	} catch (IOException e) {
		// could not read file: returns an empty array
	}
	return CharOperation.NO_CHAR;
}
 

/**
 * Returns package fragment of a type signature. The package fragment separator must be '.'
 * and the type fragment separator must be '$'.
 * <p>
 * For example:
 * <pre>
 * <code>
 * getSignatureQualifier({'L', 'j', 'a', 'v', 'a', '.', 'u', 't', 'i', 'l', '.', 'M', 'a', 'p', '$', 'E', 'n', 't', 'r', 'y', ';'}) -> {'j', 'a', 'v', 'a', '.', 'u', 't', 'i', 'l'}
 * </code>
 * </pre>
 * </p>
 *
 * @param typeSignature the type signature
 * @return the package fragment (separators are '.')
 * @since 3.1
 */
public static char[] getSignatureQualifier(char[] typeSignature) {
	if(typeSignature == null) return CharOperation.NO_CHAR;

	char[] qualifiedType = Signature.toCharArray(typeSignature);

	int dotCount = 0;
	indexFound: for(int i = 0; i < typeSignature.length; i++) {
		switch(typeSignature[i]) {
			case C_DOT:
				dotCount++;
				break;
			case C_GENERIC_START:
				break indexFound;
			case C_DOLLAR:
				break indexFound;
		}
	}

	if(dotCount > 0) {
		for(int i = 0; i < qualifiedType.length; i++) {
			if(qualifiedType[i] == '.') {
				dotCount--;
			}
			if(dotCount <= 0) {
				return CharOperation.subarray(qualifiedType, 0, i);
			}
		}
	}
	return CharOperation.NO_CHAR;
}
 

public MethodBinding getMethodBinding() {
	if (this.actualMethodBinding == null) {
		if (this.binding != null) {
			this.actualMethodBinding = new MethodBinding(this.binding.modifiers, this.binding.selector, this.binding.returnType, 
					this.binding instanceof SyntheticMethodBinding ? this.descriptor.parameters : this.binding.parameters,  // retain any faults in parameter list.
							this.binding.thrownExceptions, this.binding.declaringClass);
			this.actualMethodBinding.tagBits = this.binding.tagBits;
		} else {
			this.actualMethodBinding = new ProblemMethodBinding(CharOperation.NO_CHAR, null, ProblemReasons.NoSuchSingleAbstractMethod);
		}
	}
	return this.actualMethodBinding;
}
 

public void initializePackageCache() {
	if (this.unitScope.fPackage != null) {
		this.currentPackageName = CharOperation.concatWith(this.unitScope.fPackage.compoundName, '.');
	} else if (this.unitScope.referenceContext != null &&
			this.unitScope.referenceContext.currentPackage != null) {
		this.currentPackageName = CharOperation.concatWith(this.unitScope.referenceContext.currentPackage.tokens, '.');
	} else {
		this.currentPackageName = CharOperation.NO_CHAR;
	}
}
 

public CompletionOnFieldType(TypeReference type, boolean isLocalVariable){
	super();
	this.sourceStart = type.sourceStart;
	this.sourceEnd = type.sourceEnd;
	this.type = type;
	this.name = CharOperation.NO_CHAR;
	this.isLocalVariable = isLocalVariable;
	if (type instanceof CompletionOnSingleTypeReference) {
	    ((CompletionOnSingleTypeReference) type).fieldTypeCompletionNode = this;
	}
}
 

public CompletionOnMethodTypeParameter(TypeParameter[] typeParameters, CompilationResult compilationResult){
	super(compilationResult);
	this.selector = CharOperation.NO_CHAR;
	this.typeParameters = typeParameters;
	this.sourceStart = typeParameters[0].sourceStart;
	this.sourceEnd = typeParameters[typeParameters.length - 1].sourceEnd;
}
 

private static char[][] convertStringToChars(String[] s) {
	int length = s == null ? 0 : s.length;
	char[][] c = new char[length][];
	for (int i = 0; i < length; i++) {
		if(s[i] == null) {
			c[i] = CharOperation.NO_CHAR;
		} else {
			c[i] = s[i].toCharArray();
		}
	}
	return c;
}
 

public char[] getContents() {
	if (this.contents != null)
		return this.contents;   // answer the cached source

	// otherwise retrieve it
	try {
		return Util.getResourceContentsAsCharArray(this.file);
	} catch (CoreException e) {
		return CharOperation.NO_CHAR;
	}
}
 

public boolean doCheckUniqueInProject(QualifiedName name, JvmDeclaredType type) throws JavaModelException {
	IJavaProject javaProject = javaProjectProvider.getJavaProject(type.eResource().getResourceSet());
	getContext().put(ProjectAwareUniqueClassNameValidator.OUTPUT_CONFIGS,
			outputConfigurationProvider.getOutputConfigurations(type.eResource()));

	String packageName = type.getPackageName();
	String typeName = type.getSimpleName();
	IndexManager indexManager = JavaModelManager.getIndexManager();
	List<IPackageFragmentRoot> sourceFolders = new ArrayList<>();
	for (IPackageFragmentRoot root : javaProject.getPackageFragmentRoots()) {
		if (root.getKind() == IPackageFragmentRoot.K_SOURCE) {
			sourceFolders.add(root);
		}
	}

	if (sourceFolders.isEmpty() || indexManager.awaitingJobsCount() > 0) {
		// still indexing - don't enter a busy wait loop but ask the source folders directly
		SourceTraversal sourceTraversal = doCheckUniqueInProjectSource(packageName != null ? packageName : "", typeName, type,
				sourceFolders);
		if (sourceTraversal == SourceTraversal.DUPLICATE) {
			return false;
		} else if (sourceTraversal == SourceTraversal.UNIQUE) {
			return true;
		}
	}

	Set<String> workingCopyPaths = new HashSet<>();
	ICompilationUnit[] copies = getWorkingCopies(type);
	if (copies != null) {
		for (ICompilationUnit workingCopy : copies) {
			IPath path = workingCopy.getPath();
			if (javaProject.getPath().isPrefixOf(path) && !isDerived(workingCopy.getResource())) {
				if (workingCopy.getPackageDeclaration(packageName).exists()) {
					IType result = workingCopy.getType(typeName);
					if (result.exists()) {
						addIssue(type, workingCopy.getElementName());
						return false;
					}
				}
				workingCopyPaths.add(workingCopy.getPath().toString());
			}
		}
	}

	// The code below is adapted from BasicSearchEnginge.searchAllSecondaryTypes
	// The Index is ready, query it for a secondary type 
	char[] pkg = packageName == null ? CharOperation.NO_CHAR : packageName.toCharArray();
	TypeDeclarationPattern pattern = new TypeDeclarationPattern(pkg, //
			CharOperation.NO_CHAR_CHAR, // top level type - no enclosing type names
			typeName.toCharArray(), //
			IIndexConstants.TYPE_SUFFIX, //
			SearchPattern.R_EXACT_MATCH | SearchPattern.R_CASE_SENSITIVE);

	IndexQueryRequestor searchRequestor = new IndexQueryRequestor() {

		@Override
		public boolean acceptIndexMatch(String documentPath, SearchPattern indexRecord, SearchParticipant participant,
				AccessRuleSet access) {
			if (workingCopyPaths.contains(documentPath)) {
				return true; // filter out working copies
			}
			IFile file = ResourcesPlugin.getWorkspace().getRoot().getFile(new Path(documentPath));
			if (!isDerived(file)) {
				addIssue(type, file.getName());
				return false;
			}
			return true;
		}
	};

	try {
		SearchParticipant searchParticipant = BasicSearchEngine.getDefaultSearchParticipant(); // Java search only
		IJavaSearchScope javaSearchScope = BasicSearchEngine.createJavaSearchScope(sourceFolders.toArray(new IJavaElement[0]));
		PatternSearchJob patternSearchJob = new PatternSearchJob(pattern, searchParticipant, javaSearchScope, searchRequestor);
		indexManager.performConcurrentJob(patternSearchJob, IJavaSearchConstants.WAIT_UNTIL_READY_TO_SEARCH, null);
		return true;
	} catch (Throwable OperationCanceledException) {
		return false;
	}
}
 

private static char[] removePrefix(char[] name, char[][] prefixes) {
		// remove longer prefix
		char[] withoutPrefixName = name;
		if (prefixes != null) {
			int bestLength = 0;
			int nameLength = name.length;
			for (int i= 0; i < prefixes.length; i++) {
				char[] prefix = prefixes[i];

				int prefixLength = prefix.length;
				if(prefixLength <= nameLength) {
					if(CharOperation.prefixEquals(prefix, name, false)) {
						if (prefixLength > bestLength) {
							bestLength = prefixLength;
						}
					}
				} else {
					int currLen = 0;
					for (; currLen < nameLength; currLen++) {
						if(ScannerHelper.toLowerCase(prefix[currLen]) != ScannerHelper.toLowerCase(name[currLen])) {
							if (currLen > bestLength) {
								bestLength = currLen;
							}
							break;
						}
					}
					if(currLen == nameLength && currLen > bestLength) {
						bestLength = currLen;
					}
				}
			}
			if(bestLength > 0) {
				if(bestLength == nameLength) {
					withoutPrefixName = CharOperation.NO_CHAR;
				} else {
					withoutPrefixName = CharOperation.subarray(name, bestLength, nameLength);
				}
			}
		}
//
//
//		// remove longer prefix
//		char[] withoutPrefixName = name;
//		if (prefixes != null) {
//			int bestLength = 0;
//			for (int i= 0; i < prefixes.length; i++) {
//				char[] prefix = prefixes[i];
//				int max = prefix.length < name.length ? prefix.length : name.length;
//				int currLen = 0;
//				for (; currLen < max; currLen++) {
//					if(Character.toLowerCase(prefix[currLen]) != Character.toLowerCase(name[currLen])) {
//						if (currLen > bestLength) {
//							bestLength = currLen;
//						}
//						break;
//					}
//				}
//				if(currLen == max && currLen > bestLength) {
//					bestLength = max;
//				}
//			}
//			if(bestLength > 0) {
//				if(bestLength == name.length) {
//					withoutPrefixName = CharOperation.NO_CHAR;
//				} else {
//					withoutPrefixName = CharOperation.subarray(name, bestLength, name.length);
//				}
//			}
//		}

		return withoutPrefixName;
	}
 

/**
 * Returns a char array containing all but the last segment of the given
 * dot-separated qualified name. Returns the empty char array if it is not qualified.
 * <p>
 * For example:
 * <pre>
 * <code>
 * getQualifier({'j', 'a', 'v', 'a', '.', 'l', 'a', 'n', 'g', '.', 'O', 'b', 'j', 'e', 'c', 't'}) -> {'j', 'a', 'v', 'a', '.', 'l', 'a', 'n', 'g'}
 * getQualifier({'O', 'u', 't', 'e', 'r', '.', 'I', 'n', 'n', 'e', 'r'}) -> {'O', 'u', 't', 'e', 'r'}
 * getQualifier({'j', 'a', 'v', 'a', '.', 'u', 't', 'i', 'l', '.', 'L', 'i', 's', 't', '<', 'j', 'a', 'v', 'a', '.', 'l', 'a', 'n', 'g', '.', 'S', 't', 'r', 'i', 'n', 'g', '>'}) -> {'j', 'a', 'v', 'a', '.', 'u', 't', 'i', 'l'}
 * </code>
 * </pre>
 * </p>
 *
 * @param name the name
 * @return the qualifier prefix, or the empty char array if the name contains no
 *   dots
 * @exception NullPointerException if name is null
 * @since 2.0
 */
public static char[] getQualifier(char[] name) {
	int firstGenericStart = CharOperation.indexOf(C_GENERIC_START, name);
	int lastDot = CharOperation.lastIndexOf(C_DOT, name, 0, firstGenericStart == -1 ? name.length-1 : firstGenericStart);
	if (lastDot == -1) {
		return CharOperation.NO_CHAR;
	}
	return CharOperation.subarray(name, 0, lastDot);
}