import org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment; //导入依赖的package包/类
@Override
public List<? extends Element> getEnclosedElements() {
	PackageBinding binding = (PackageBinding)_binding;
	LookupEnvironment environment = binding.environment;
	char[][][] typeNames = null;
	INameEnvironment nameEnvironment = binding.environment.nameEnvironment;
	if (nameEnvironment instanceof FileSystem) {
		typeNames = ((FileSystem) nameEnvironment).findTypeNames(binding.compoundName);
	}
	HashSet<Element> set = new HashSet<Element>(); 
	if (typeNames != null) {
		for (char[][] typeName : typeNames) {
			ReferenceBinding type = environment.getType(typeName);
			if (type != null && type.isValidBinding()) {
				set.add(_env.getFactory().newElement(type));
			}
		}
	}
	ArrayList<Element> list = new ArrayList<Element>(set.size());
	list.addAll(set);
	return Collections.unmodifiableList(list);
}
 

import org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment; //导入依赖的package包/类
protected void setExtendedData(
		ITypeRoot typeRoot,
		CompilationUnitDeclaration compilationUnitDeclaration,
		LookupEnvironment lookupEnvironment,
		Scope scope,
		ASTNode astNode,
		ASTNode astNodeParent,
		WorkingCopyOwner owner,
		CompletionParser parser) {
	this.isExtended = true;
	this.extendedContext =
		new InternalExtendedCompletionContext(
				this,
				typeRoot,
				compilationUnitDeclaration,
				lookupEnvironment,
				scope,
				astNode,
				astNodeParent,
				owner,
				parser);
}
 

import org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment; //导入依赖的package包/类
public InternalExtendedCompletionContext(
		InternalCompletionContext completionContext,
		ITypeRoot typeRoot,
		CompilationUnitDeclaration compilationUnitDeclaration,
		LookupEnvironment lookupEnvironment,
		Scope assistScope,
		ASTNode assistNode,
		ASTNode assistNodeParent,
		WorkingCopyOwner owner,
		CompletionParser parser) {
	this.completionContext = completionContext;
	this.typeRoot = typeRoot;
	this.compilationUnitDeclaration = compilationUnitDeclaration;
	this.lookupEnvironment = lookupEnvironment;
	this.assistScope = assistScope;
	this.assistNode = assistNode;
	this.assistNodeParent = assistNodeParent;
	this.owner = owner;
	this.parser = parser;
}
 

import org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment; //导入依赖的package包/类
private ReferenceBinding[] processClassNames(LookupEnvironment environment) {
	// check for .class file presence in case of apt processing
	int length = this.classNames.length;
	ReferenceBinding[] referenceBindings = new ReferenceBinding[length];
	for (int i = 0; i < length; i++) {
		String currentName = this.classNames[i];
		char[][] compoundName = null;
		if (currentName.indexOf('.') != -1) {
			// consider names with '.' as fully qualified names
			char[] typeName = currentName.toCharArray();
			compoundName = CharOperation.splitOn('.', typeName);
		} else {
			compoundName = new char[][] { currentName.toCharArray() };
		}
		ReferenceBinding type = environment.getType(compoundName);
		if (type != null && type.isValidBinding()) {
			if (type.isBinaryBinding()) {
				referenceBindings[i] = type;
			}
		} else {
			throw new IllegalArgumentException(
					this.bind("configure.invalidClassName", currentName));//$NON-NLS-1$
		}
	}
	return referenceBindings;
}
 

import org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment; //导入依赖的package包/类
private static void copyNameLookupAndCompletionEngine(CompletionProposalCollector completionProposalCollector, IJavaCompletionProposal proposal,
		InternalCompletionProposal newProposal) {
	
	try {
		InternalCompletionContext context = (InternalCompletionContext) Reflection.contextField.get(completionProposalCollector);
		InternalExtendedCompletionContext extendedContext = (InternalExtendedCompletionContext) Reflection.extendedContextField.get(context);
		LookupEnvironment lookupEnvironment = (LookupEnvironment) Reflection.lookupEnvironmentField.get(extendedContext);
		Reflection.nameLookupField.set(newProposal, ((SearchableEnvironment) lookupEnvironment.nameEnvironment).nameLookup);
		Reflection.completionEngineField.set(newProposal, lookupEnvironment.typeRequestor);
	} catch (IllegalAccessException ignore) {
		// ignore
	}
}
 

import org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment; //导入依赖的package包/类
@Override
public PackageElement getPackageElement(CharSequence name) {
	LookupEnvironment le = _env.getLookupEnvironment();
	if (name.length() == 0) {
		return new PackageElementImpl(_env, le.defaultPackage);
	}
	char[] packageName = name.toString().toCharArray();
	PackageBinding packageBinding = le.createPackage(CharOperation.splitOn('.', packageName));
	if (packageBinding == null) {
		return null;
	}
	return new PackageElementImpl(_env, packageBinding);
}
 

import org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment; //导入依赖的package包/类
@Override
public TypeElement getTypeElement(CharSequence name) {
	LookupEnvironment le = _env.getLookupEnvironment();
	final char[][] compoundName = CharOperation.splitOn('.', name.toString().toCharArray());
	ReferenceBinding binding = le.getType(compoundName);
	// If we didn't find the binding, maybe it's a nested type;
	// try finding the top-level type and then working downwards.
	if (null == binding) {
		ReferenceBinding topLevelBinding = null;
		int topLevelSegments = compoundName.length;
		while (--topLevelSegments > 0) {
			char[][] topLevelName = new char[topLevelSegments][];
			for (int i = 0; i < topLevelSegments; ++i) {
				topLevelName[i] = compoundName[i];
			}
			topLevelBinding = le.getType(topLevelName);
			if (null != topLevelBinding) {
				break;
			}
		}
		if (null == topLevelBinding) {
			return null;
		}
		binding = topLevelBinding;
		for (int i = topLevelSegments; null != binding && i < compoundName.length; ++i) {
			binding = binding.getMemberType(compoundName[i]);
		}
	}
	if (null == binding) {
		return null;
	}
	return new TypeElementImpl(_env, binding, null);
}
 

import org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment; //导入依赖的package包/类
public void resolveDocument() {
	try {
		IPath path = new Path(this.document.getPath());
		IProject project = ResourcesPlugin.getWorkspace().getRoot().getProject(path.segment(0));
		JavaModel model = JavaModelManager.getJavaModelManager().getJavaModel();
		JavaProject javaProject = (JavaProject) model.getJavaProject(project);

		this.options = new CompilerOptions(javaProject.getOptions(true));
		ProblemReporter problemReporter =
				new ProblemReporter(
						DefaultErrorHandlingPolicies.proceedWithAllProblems(),
						this.options,
						new DefaultProblemFactory());

		// Re-parse using normal parser, IndexingParser swallows several nodes, see comment above class.
		this.basicParser = new Parser(problemReporter, false);
		this.basicParser.reportOnlyOneSyntaxError = true;
		this.basicParser.scanner.taskTags = null;
		this.cud = this.basicParser.parse(this.compilationUnit, new CompilationResult(this.compilationUnit, 0, 0, this.options.maxProblemsPerUnit));

		// Use a non model name environment to avoid locks, monitors and such.
		INameEnvironment nameEnvironment = new JavaSearchNameEnvironment(javaProject, JavaModelManager.getJavaModelManager().getWorkingCopies(DefaultWorkingCopyOwner.PRIMARY, true/*add primary WCs*/));
		this.lookupEnvironment = new LookupEnvironment(this, this.options, problemReporter, nameEnvironment);
		reduceParseTree(this.cud);
		this.lookupEnvironment.buildTypeBindings(this.cud, null);
		this.lookupEnvironment.completeTypeBindings();
		this.cud.scope.faultInTypes();
		this.cud.resolve();
	} catch (Exception e) {
		if (JobManager.VERBOSE) {
			e.printStackTrace();
		}
	}
}
 

import org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment; //导入依赖的package包/类
private BindingKeyResolver(BindingKeyParser parser, Compiler compiler, LookupEnvironment environment, CompilationUnitDeclaration outerMostParsedUnit, HashtableOfObject parsedUnits) {
	super(parser);
	this.compiler = compiler;
	this.environment = environment;
	this.outerMostParsedUnit = outerMostParsedUnit;
	this.resolvedUnits = parsedUnits;
}
 

import org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment; //导入依赖的package包/类
public boolean isSubsignature(IMethodBinding otherMethod) {
	try {
		LookupEnvironment lookupEnvironment = this.resolver.lookupEnvironment();
		return lookupEnvironment != null
			&& lookupEnvironment.methodVerifier().isMethodSubsignature(this.binding, ((MethodBinding) otherMethod).binding);
	} catch (AbortCompilation e) {
		// don't surface internal exception to clients
		// see https://bugs.eclipse.org/bugs/show_bug.cgi?id=143013
		return false;
	}
}
 

import org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment; //导入依赖的package包/类
DefaultBindingResolver(LookupEnvironment lookupEnvironment, WorkingCopyOwner workingCopyOwner, BindingTables bindingTables, boolean isRecoveringBindings, boolean fromJavaProject) {
	this.newAstToOldAst = new HashMap();
	this.astNodesToBlockScope = new HashMap();
	this.bindingsToAstNodes = new HashMap();
	this.bindingTables = bindingTables;
	this.scope = new CompilationUnitScope(new CompilationUnitDeclaration(null, null, -1), lookupEnvironment);
	this.workingCopyOwner = workingCopyOwner;
	this.isRecoveringBindings = isRecoveringBindings;
	this.fromJavaProject = fromJavaProject;
}
 

import org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment; //导入依赖的package包/类
/** Create initial walker with non-empty type annotations. */
public NonNullDefaultAwareTypeAnnotationWalker(IBinaryTypeAnnotation[] typeAnnotations,
					int defaultNullness, LookupEnvironment environment) {
	super(typeAnnotations);
	this.nonNullAnnotation = getNonNullAnnotation(environment);
	this.defaultNullness = defaultNullness;
}
 

import org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment; //导入依赖的package包/类
private static IBinaryAnnotation getNonNullAnnotation(LookupEnvironment environment) {
	final char[] nonNullAnnotationName = CharOperation.concat(
					'L', CharOperation.concatWith(environment.getNonNullAnnotationName(), '/'), ';');
	// create the synthetic annotation:
	return new IBinaryAnnotation() {
		@Override
		public char[] getTypeName() {
			return nonNullAnnotationName;
		}
		@Override
		public IBinaryElementValuePair[] getElementValuePairs() {
			return null;
		}
	};
}
 

import org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment; //导入依赖的package包/类
private void mergeParameterNullAnnotations(BlockScope currentScope) {
	LookupEnvironment env = currentScope.environment();
	TypeBinding[] ourParameters = this.binding.parameters;
	TypeBinding[] descParameters = this.descriptor.parameters;
	int len = Math.min(ourParameters.length, descParameters.length);
	for (int i = 0; i < len; i++) {
		long ourTagBits = ourParameters[i].tagBits & TagBits.AnnotationNullMASK;
		long descTagBits = descParameters[i].tagBits & TagBits.AnnotationNullMASK;
		if (ourTagBits == 0L) {
			if (descTagBits != 0L && !ourParameters[i].isBaseType()) {
				AnnotationBinding [] annotations = descParameters[i].getTypeAnnotations();
				for (int j = 0, length = annotations.length; j < length; j++) {
					AnnotationBinding annotation = annotations[j];
					if (annotation != null) {
						switch (annotation.getAnnotationType().id) {
							case TypeIds.T_ConfiguredAnnotationNullable :
							case TypeIds.T_ConfiguredAnnotationNonNull :
								ourParameters[i] = env.createAnnotatedType(ourParameters[i], new AnnotationBinding [] { annotation });
								break;
						}
					}
				}
			}
		} else if (ourTagBits != descTagBits) {
			if (ourTagBits == TagBits.AnnotationNonNull) { // requested @NonNull not provided
				char[][] inheritedAnnotationName = null;
				if (descTagBits == TagBits.AnnotationNullable)
					inheritedAnnotationName = env.getNullableAnnotationName();
				currentScope.problemReporter().illegalRedefinitionToNonNullParameter(this.arguments[i], this.descriptor.declaringClass, inheritedAnnotationName);
			}
		}			
	}
}
 

import org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment; //导入依赖的package包/类
private ReferenceBinding[] processClassNames(LookupEnvironment environment) {
    int length = this.classNames.length;
    ReferenceBinding[] referenceBindings = new ReferenceBinding[length];

    for(int i = 0; i < length; ++i) {
        String currentName = this.classNames[i];
        Object compoundName = null;
        char[][] var8;
        if(currentName.indexOf(46) != -1) {
            char[] type = currentName.toCharArray();
            var8 = CharOperation.splitOn('.', type);
        } else {
            var8 = new char[][]{currentName.toCharArray()};
        }

        ReferenceBinding var9 = environment.getType(var8);
        if(var9 == null || !var9.isValidBinding()) {
            throw new IllegalArgumentException(this.bind("configure.invalidClassName", currentName));
        }

        if(var9.isBinaryBinding()) {
            referenceBindings[i] = var9;
        }
    }

    return referenceBindings;
}
 

import org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment; //导入依赖的package包/类
/**
 * Return true if this method overrides {@code overridden} in the context of {@code type}.  For
 * instance, consider 
 * <pre>
 *   interface A { void f(); }
 *   class B { void f() {} }
 *   class C extends B implements I { }
 * </pre> 
 * In the context of B, B.f() does not override A.f(); they are unrelated.  But in the context of
 * C, B.f() does override A.f().  That is, the copy of B.f() that C inherits overrides A.f().
 * This is equivalent to considering two questions: first, does C inherit B.f(); if so, does
 * the inherited C.f() override A.f().  If B.f() were private, for instance, then in the context
 * of C it would still not override A.f().  
 * 
 * @see javax.lang.model.util.Elements#overrides(ExecutableElement, ExecutableElement, TypeElement)
    * @jls3 8.4.8 Inheritance, Overriding, and Hiding
    * @jls3 9.4.1 Inheritance and Overriding
 */
public boolean overrides(ExecutableElement overridden, TypeElement type)
{
	MethodBinding overriddenBinding = (MethodBinding)((ExecutableElementImpl) overridden)._binding;
	ReferenceBinding overriderContext = (ReferenceBinding)((TypeElementImpl)type)._binding;
	if ((MethodBinding)_binding == overriddenBinding
			|| overriddenBinding.isStatic()
			|| overriddenBinding.isPrivate()
			|| ((MethodBinding)_binding).isStatic()) {
		return false;
	}
	char[] selector = ((MethodBinding)_binding).selector;
	if (!CharOperation.equals(selector, overriddenBinding.selector))
		return false;
	
	// Construct a binding to the equivalent of this (the overrider) as it would be inherited by 'type'.
	// Can only do this if 'type' is descended from the overrider.
	// Second clause of the AND is required to match a peculiar javac behavior.
	if (null == overriderContext.findSuperTypeOriginatingFrom(((MethodBinding)_binding).declaringClass) &&
			null == ((MethodBinding)_binding).declaringClass.findSuperTypeOriginatingFrom(overriderContext)) {
		return false;
	}
	MethodBinding overriderBinding = new MethodBinding((MethodBinding)_binding, overriderContext);
	if (overriderBinding.isPrivate()) {
		// a private method can never override another method.  The other method would either be
		// private itself, in which case it would not be visible; or this would be a restriction 
		// of access, which is a compile-time error.
		return false;
	}
	
	TypeBinding match = overriderBinding.declaringClass.findSuperTypeOriginatingFrom(overriddenBinding.declaringClass);
	if (!(match instanceof ReferenceBinding)) return false;

	org.eclipse.jdt.internal.compiler.lookup.MethodBinding[] superMethods = ((ReferenceBinding)match).getMethods(selector);
	LookupEnvironment lookupEnvironment = _env.getLookupEnvironment();
	if (lookupEnvironment == null) return false;
	MethodVerifier methodVerifier = lookupEnvironment.methodVerifier();
	for (int i = 0, length = superMethods.length; i < length; i++) {
		if (superMethods[i].original() == overriddenBinding) {
			return methodVerifier.doesMethodOverride(overriderBinding, superMethods[i]);
		}
	}
	return false;
}
 

import org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment; //导入依赖的package包/类
public LookupEnvironment getLookupEnvironment() {
	return _compiler.lookupEnvironment;
}
 

import org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment; //导入依赖的package包/类
/**
 * @see IMethodBinding#overrides(IMethodBinding)
 */
public boolean overrides(IMethodBinding otherMethod) {
		LookupEnvironment lookupEnvironment = this.resolver.lookupEnvironment();
		return lookupEnvironment != null
			&& lookupEnvironment.methodVerifier().doesMethodOverride(this.binding, ((MethodBinding) otherMethod).binding);
}
 

import org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment; //导入依赖的package包/类
LookupEnvironment lookupEnvironment() {
	return this.scope.environment();
}
 

import org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment; //导入依赖的package包/类
public static ClassFile getNewInstance(SourceTypeBinding typeBinding) {
	LookupEnvironment env = typeBinding.scope.environment();
	return env.classFilePool.acquire(typeBinding);
}