+++ /dev/null
-/*******************************************************************************
- * Copyright (c) 2000, 2004 IBM Corporation and others.
- * All rights reserved. This program and the accompanying materials
- * are made available under the terms of the Common Public License v1.0
- * which accompanies this distribution, and is available at
- * http://www.eclipse.org/legal/cpl-v10.html
- *
- * Contributors:
- * IBM Corporation - initial API and implementation
- *******************************************************************************/
-package org.eclipse.jdt.internal.compiler.lookup;
-
-import org.eclipse.jdt.core.compiler.CharOperation;
-import org.eclipse.jdt.internal.compiler.ast.CompilationUnitDeclaration;
-import org.eclipse.jdt.internal.compiler.env.IBinaryType;
-import org.eclipse.jdt.internal.compiler.env.INameEnvironment;
-import org.eclipse.jdt.internal.compiler.env.NameEnvironmentAnswer;
-import org.eclipse.jdt.internal.compiler.impl.CompilerOptions;
-import org.eclipse.jdt.internal.compiler.impl.ITypeRequestor;
-import org.eclipse.jdt.internal.compiler.problem.ProblemReporter;
-import org.eclipse.jdt.internal.compiler.util.HashtableOfPackage;
-import org.eclipse.jdt.internal.compiler.util.Util;
-
-public class LookupEnvironment implements BaseTypes, ProblemReasons, TypeConstants {
- public CompilerOptions options;
- public ProblemReporter problemReporter;
- public ITypeRequestor typeRequestor;
-
- PackageBinding defaultPackage;
- ImportBinding[] defaultImports;
- HashtableOfPackage knownPackages;
- static final ProblemPackageBinding TheNotFoundPackage = new ProblemPackageBinding(CharOperation.NO_CHAR, NotFound);
- static final ProblemReferenceBinding TheNotFoundType = new ProblemReferenceBinding(CharOperation.NO_CHAR, NotFound);
-
- private INameEnvironment nameEnvironment;
- private MethodVerifier verifier;
- private ArrayBinding[][] uniqueArrayBindings;
-
- private CompilationUnitDeclaration[] units = new CompilationUnitDeclaration[4];
- private int lastUnitIndex = -1;
- private int lastCompletedUnitIndex = -1;
- public CompilationUnitDeclaration unitBeingCompleted = null; // only set while completing units
-
- // indicate in which step on the compilation we are.
- // step 1 : build the reference binding
- // step 2 : conect the hierarchy (connect bindings)
- // step 3 : build fields and method bindings.
- private int stepCompleted;
- final static int BUILD_TYPE_HIERARCHY = 1;
- final static int CHECK_AND_SET_IMPORTS = 2;
- final static int CONNECT_TYPE_HIERARCHY = 3;
- final static int BUILD_FIELDS_AND_METHODS = 4;
-
- // shared byte[]'s used by ClassFile to avoid allocating MBs during a build
- public boolean sharedArraysUsed = true; // set to false once actual arrays are allocated
- public byte[] sharedClassFileHeader = null;
- public byte[] sharedClassFileContents = null;
-
-public LookupEnvironment(ITypeRequestor typeRequestor, CompilerOptions options, ProblemReporter problemReporter, INameEnvironment nameEnvironment) {
- this.typeRequestor = typeRequestor;
- this.options = options;
- this.problemReporter = problemReporter;
- this.defaultPackage = new PackageBinding(this); // assume the default package always exists
- this.defaultImports = null;
- this.nameEnvironment = nameEnvironment;
- this.knownPackages = new HashtableOfPackage();
- this.uniqueArrayBindings = new ArrayBinding[5][];
- this.uniqueArrayBindings[0] = new ArrayBinding[50]; // start off the most common 1 dimension array @ 50
-}
-/* Ask the oracle for a type which corresponds to the compoundName.
-* Answer null if the name cannot be found.
-*/
-
-public ReferenceBinding askForType(char[][] compoundName) {
- NameEnvironmentAnswer answer = nameEnvironment.findType(compoundName);
- if (answer == null)
- return null;
-
- if (answer.isBinaryType())
- // the type was found as a .class file
- typeRequestor.accept(answer.getBinaryType(), computePackageFrom(compoundName));
- else if (answer.isCompilationUnit())
- // the type was found as a .java file, try to build it then search the cache
- typeRequestor.accept(answer.getCompilationUnit());
- else if (answer.isSourceType())
- // the type was found as a source model
- typeRequestor.accept(answer.getSourceTypes(), computePackageFrom(compoundName));
-
- return getCachedType(compoundName);
-}
-/* Ask the oracle for a type named name in the packageBinding.
-* Answer null if the name cannot be found.
-*/
-
-ReferenceBinding askForType(PackageBinding packageBinding, char[] name) {
- if (packageBinding == null) {
- if (defaultPackage == null)
- return null;
- packageBinding = defaultPackage;
- }
- NameEnvironmentAnswer answer = nameEnvironment.findType(name, packageBinding.compoundName);
- if (answer == null)
- return null;
-
- if (answer.isBinaryType())
- // the type was found as a .class file
- typeRequestor.accept(answer.getBinaryType(), packageBinding);
- else if (answer.isCompilationUnit())
- // the type was found as a .java file, try to build it then search the cache
- typeRequestor.accept(answer.getCompilationUnit());
- else if (answer.isSourceType())
- // the type was found as a source model
- typeRequestor.accept(answer.getSourceTypes(), packageBinding);
-
- return packageBinding.getType0(name);
-}
-/* Create the initial type bindings for the compilation unit.
-*
-* See completeTypeBindings() for a description of the remaining steps
-*
-* NOTE: This method can be called multiple times as additional source files are needed
-*/
-
-public void buildTypeBindings(CompilationUnitDeclaration unit) {
- CompilationUnitScope scope = new CompilationUnitScope(unit, this);
- scope.buildTypeBindings();
-
- int unitsLength = units.length;
- if (++lastUnitIndex >= unitsLength)
- System.arraycopy(units, 0, units = new CompilationUnitDeclaration[2 * unitsLength], 0, unitsLength);
- units[lastUnitIndex] = unit;
-}
-/* Cache the binary type since we know it is needed during this compile.
-*
-* Answer the created BinaryTypeBinding or null if the type is already in the cache.
-*/
-
-public BinaryTypeBinding cacheBinaryType(IBinaryType binaryType) {
- return cacheBinaryType(binaryType, true);
-}
-/* Cache the binary type since we know it is needed during this compile.
-*
-* Answer the created BinaryTypeBinding or null if the type is already in the cache.
-*/
-
-public BinaryTypeBinding cacheBinaryType(IBinaryType binaryType, boolean needFieldsAndMethods) {
- char[][] compoundName = CharOperation.splitOn('/', binaryType.getName());
- ReferenceBinding existingType = getCachedType(compoundName);
-
- if (existingType == null || existingType instanceof UnresolvedReferenceBinding)
- // only add the binary type if its not already in the cache
- return createBinaryTypeFrom(binaryType, computePackageFrom(compoundName), needFieldsAndMethods);
- return null; // the type already exists & can be retrieved from the cache
-}
-/*
-* 1. Connect the type hierarchy for the type bindings created for parsedUnits.
-* 2. Create the field bindings
-* 3. Create the method bindings
-*/
-
-/* We know each known compilationUnit is free of errors at this point...
-*
-* Each step will create additional bindings unless a problem is detected, in which
-* case either the faulty import/superinterface/field/method will be skipped or a
-* suitable replacement will be substituted (such as Object for a missing superclass)
-*/
-
-public void completeTypeBindings() {
- stepCompleted = BUILD_TYPE_HIERARCHY;
-
- for (int i = this.lastCompletedUnitIndex + 1; i <= this.lastUnitIndex; i++) {
- (this.unitBeingCompleted = this.units[i]).scope.checkAndSetImports();
- }
- stepCompleted = CHECK_AND_SET_IMPORTS;
-
- for (int i = this.lastCompletedUnitIndex + 1; i <= this.lastUnitIndex; i++) {
- (this.unitBeingCompleted = this.units[i]).scope.connectTypeHierarchy();
- }
- stepCompleted = CONNECT_TYPE_HIERARCHY;
-
- for (int i = this.lastCompletedUnitIndex + 1; i <= this.lastUnitIndex; i++) {
- (this.unitBeingCompleted = this.units[i]).scope.buildFieldsAndMethods();
- this.units[i] = null; // release unnecessary reference to the parsed unit
- }
- stepCompleted = BUILD_FIELDS_AND_METHODS;
- this.lastCompletedUnitIndex = this.lastUnitIndex;
- this.unitBeingCompleted = null;
-}
-/*
-* 1. Connect the type hierarchy for the type bindings created for parsedUnits.
-* 2. Create the field bindings
-* 3. Create the method bindings
-*/
-
-/*
-* Each step will create additional bindings unless a problem is detected, in which
-* case either the faulty import/superinterface/field/method will be skipped or a
-* suitable replacement will be substituted (such as Object for a missing superclass)
-*/
-
-public void completeTypeBindings(CompilationUnitDeclaration parsedUnit) {
- if (stepCompleted == BUILD_FIELDS_AND_METHODS) {
- // This can only happen because the original set of units are completely built and
- // are now being processed, so we want to treat all the additional units as a group
- // until they too are completely processed.
- completeTypeBindings();
- } else {
- if (parsedUnit.scope == null) return; // parsing errors were too severe
-
- if (stepCompleted >= CHECK_AND_SET_IMPORTS)
- (this.unitBeingCompleted = parsedUnit).scope.checkAndSetImports();
-
- if (stepCompleted >= CONNECT_TYPE_HIERARCHY)
- (this.unitBeingCompleted = parsedUnit).scope.connectTypeHierarchy();
-
- this.unitBeingCompleted = null;
- }
-}
-/*
-* Used by other compiler tools which do not start by calling completeTypeBindings().
-*
-* 1. Connect the type hierarchy for the type bindings created for parsedUnits.
-* 2. Create the field bindings
-* 3. Create the method bindings
-*/
-
-public void completeTypeBindings(CompilationUnitDeclaration parsedUnit, boolean buildFieldsAndMethods) {
- if (parsedUnit.scope == null) return; // parsing errors were too severe
-
- (this.unitBeingCompleted = parsedUnit).scope.checkAndSetImports();
- parsedUnit.scope.connectTypeHierarchy();
- if (buildFieldsAndMethods)
- parsedUnit.scope.buildFieldsAndMethods();
- this.unitBeingCompleted = null;
-}
-private PackageBinding computePackageFrom(char[][] constantPoolName) {
- if (constantPoolName.length == 1)
- return defaultPackage;
-
- PackageBinding packageBinding = getPackage0(constantPoolName[0]);
- if (packageBinding == null || packageBinding == TheNotFoundPackage) {
- packageBinding = new PackageBinding(constantPoolName[0], this);
- knownPackages.put(constantPoolName[0], packageBinding);
- }
-
- for (int i = 1, length = constantPoolName.length - 1; i < length; i++) {
- PackageBinding parent = packageBinding;
- if ((packageBinding = parent.getPackage0(constantPoolName[i])) == null || packageBinding == TheNotFoundPackage) {
- packageBinding = new PackageBinding(CharOperation.subarray(constantPoolName, 0, i + 1), parent, this);
- parent.addPackage(packageBinding);
- }
- }
- return packageBinding;
-}
-/* Used to guarantee array type identity.
-*/
-
-ArrayBinding createArrayType(TypeBinding type, int dimensionCount) {
- if (type instanceof LocalTypeBinding) // cache local type arrays with the local type itself
- return ((LocalTypeBinding) type).createArrayType(dimensionCount);
-
- // find the array binding cache for this dimension
- int dimIndex = dimensionCount - 1;
- int length = uniqueArrayBindings.length;
- ArrayBinding[] arrayBindings;
- if (dimIndex < length) {
- if ((arrayBindings = uniqueArrayBindings[dimIndex]) == null)
- uniqueArrayBindings[dimIndex] = arrayBindings = new ArrayBinding[10];
- } else {
- System.arraycopy(
- uniqueArrayBindings, 0,
- uniqueArrayBindings = new ArrayBinding[dimensionCount][], 0,
- length);
- uniqueArrayBindings[dimIndex] = arrayBindings = new ArrayBinding[10];
- }
-
- // find the cached array binding for this leaf component type (if any)
- int index = -1;
- length = arrayBindings.length;
- while (++index < length) {
- ArrayBinding currentBinding = arrayBindings[index];
- if (currentBinding == null) // no matching array, but space left
- return arrayBindings[index] = new ArrayBinding(type, dimensionCount);
- if (currentBinding.leafComponentType == type)
- return currentBinding;
- }
-
- // no matching array, no space left
- System.arraycopy(
- arrayBindings, 0,
- (arrayBindings = new ArrayBinding[length * 2]), 0,
- length);
- uniqueArrayBindings[dimIndex] = arrayBindings;
- return arrayBindings[length] = new ArrayBinding(type, dimensionCount);
-}
-public BinaryTypeBinding createBinaryTypeFrom(IBinaryType binaryType, PackageBinding packageBinding) {
- return createBinaryTypeFrom(binaryType, packageBinding, true);
-}
-public BinaryTypeBinding createBinaryTypeFrom(IBinaryType binaryType, PackageBinding packageBinding, boolean needFieldsAndMethods) {
- BinaryTypeBinding binaryBinding = new BinaryTypeBinding(packageBinding, binaryType, this);
-
- // resolve any array bindings which reference the unresolvedType
- ReferenceBinding cachedType = packageBinding.getType0(binaryBinding.compoundName[binaryBinding.compoundName.length - 1]);
- if (cachedType != null) {
- if (cachedType.isBinaryBinding()) // sanity check before the cast... at this point the cache should ONLY contain unresolved types
- return (BinaryTypeBinding) cachedType;
-
- UnresolvedReferenceBinding unresolvedType = (UnresolvedReferenceBinding) cachedType;
- unresolvedType.resolvedType = binaryBinding;
- updateArrayCache(unresolvedType, binaryBinding);
- }
-
- packageBinding.addType(binaryBinding);
- binaryBinding.cachePartsFrom(binaryType, needFieldsAndMethods);
- return binaryBinding;
-}
-/* Used to create packages from the package statement.
-*/
-
-PackageBinding createPackage(char[][] compoundName) {
- PackageBinding packageBinding = getPackage0(compoundName[0]);
- if (packageBinding == null || packageBinding == TheNotFoundPackage) {
- packageBinding = new PackageBinding(compoundName[0], this);
- knownPackages.put(compoundName[0], packageBinding);
- }
-
- for (int i = 1, length = compoundName.length; i < length; i++) {
- // check to see if it collides with a known type...
- // this case can only happen if the package does not exist as a directory in the file system
- // otherwise when the source type was defined, the correct error would have been reported
- // unless its an unresolved type which is referenced from an inconsistent class file
- ReferenceBinding type = packageBinding.getType0(compoundName[i]);
- if (type != null && type != TheNotFoundType && !(type instanceof UnresolvedReferenceBinding))
- return null;
-
- PackageBinding parent = packageBinding;
- if ((packageBinding = parent.getPackage0(compoundName[i])) == null || packageBinding == TheNotFoundPackage) {
- // if the package is unknown, check to see if a type exists which would collide with the new package
- // catches the case of a package statement of: package java.lang.Object;
- // since the package can be added after a set of source files have already been compiled, we need
- // whenever a package statement is encountered
- if (nameEnvironment.findType(compoundName[i], parent.compoundName) != null)
- return null;
-
- packageBinding = new PackageBinding(CharOperation.subarray(compoundName, 0, i + 1), parent, this);
- parent.addPackage(packageBinding);
- }
- }
- return packageBinding;
-}
-/* Answer the type for the compoundName if it exists in the cache.
-* Answer theNotFoundType if it could not be resolved the first time
-* it was looked up, otherwise answer null.
-*
-* NOTE: Do not use for nested types... the answer is NOT the same for a.b.C or a.b.C.D.E
-* assuming C is a type in both cases. In the a.b.C.D.E case, null is the answer.
-*/
-
-public ReferenceBinding getCachedType(char[][] compoundName) {
- if (compoundName.length == 1) {
- if (defaultPackage == null)
- return null;
- return defaultPackage.getType0(compoundName[0]);
- }
-
- PackageBinding packageBinding = getPackage0(compoundName[0]);
- if (packageBinding == null || packageBinding == TheNotFoundPackage)
- return null;
-
- for (int i = 1, packageLength = compoundName.length - 1; i < packageLength; i++)
- if ((packageBinding = packageBinding.getPackage0(compoundName[i])) == null || packageBinding == TheNotFoundPackage)
- return null;
- return packageBinding.getType0(compoundName[compoundName.length - 1]);
-}
-/* Answer the top level package named name if it exists in the cache.
-* Answer theNotFoundPackage if it could not be resolved the first time
-* it was looked up, otherwise answer null.
-*
-* NOTE: Senders must convert theNotFoundPackage into a real problem
-* package if its to returned.
-*/
-
-PackageBinding getPackage0(char[] name) {
- return knownPackages.get(name);
-}
-/* Answer the top level package named name.
-* Ask the oracle for the package if its not in the cache.
-* Answer null if the package cannot be found.
-*/
-
-PackageBinding getTopLevelPackage(char[] name) {
- PackageBinding packageBinding = getPackage0(name);
- if (packageBinding != null) {
- if (packageBinding == TheNotFoundPackage)
- return null;
- return packageBinding;
- }
-
- if (nameEnvironment.isPackage(null, name)) {
- knownPackages.put(name, packageBinding = new PackageBinding(name, this));
- return packageBinding;
- }
-
- knownPackages.put(name, TheNotFoundPackage); // saves asking the oracle next time
- return null;
-}
-/* Answer the type corresponding to the compoundName.
-* Ask the oracle for the type if its not in the cache.
-* Answer null if the type cannot be found... likely a fatal error.
-*/
-
-public ReferenceBinding getType(char[][] compoundName) {
- ReferenceBinding referenceBinding;
-
- if (compoundName.length == 1) {
- if (defaultPackage == null)
- return null;
-
- if ((referenceBinding = defaultPackage.getType0(compoundName[0])) == null) {
- PackageBinding packageBinding = getPackage0(compoundName[0]);
- if (packageBinding != null && packageBinding != TheNotFoundPackage)
- return null; // collides with a known package... should not call this method in such a case
- referenceBinding = askForType(defaultPackage, compoundName[0]);
- }
- } else {
- PackageBinding packageBinding = getPackage0(compoundName[0]);
- if (packageBinding == TheNotFoundPackage)
- return null;
-
- if (packageBinding != null) {
- for (int i = 1, packageLength = compoundName.length - 1; i < packageLength; i++) {
- if ((packageBinding = packageBinding.getPackage0(compoundName[i])) == null)
- break;
- if (packageBinding == TheNotFoundPackage)
- return null;
- }
- }
-
- if (packageBinding == null)
- referenceBinding = askForType(compoundName);
- else if ((referenceBinding = packageBinding.getType0(compoundName[compoundName.length - 1])) == null)
- referenceBinding = askForType(packageBinding, compoundName[compoundName.length - 1]);
- }
-
- if (referenceBinding == null || referenceBinding == TheNotFoundType)
- return null;
- if (referenceBinding instanceof UnresolvedReferenceBinding)
- referenceBinding = ((UnresolvedReferenceBinding) referenceBinding).resolve(this);
-
- // compoundName refers to a nested type incorrectly (for example, package1.A$B)
- if (referenceBinding.isNestedType())
- return new ProblemReferenceBinding(compoundName, InternalNameProvided);
- return referenceBinding;
-}
-/* Answer the type corresponding to the name from the binary file.
-* Does not ask the oracle for the type if its not found in the cache... instead an
-* unresolved type is returned which must be resolved before used.
-*
-* NOTE: Does NOT answer base types nor array types!
-*
-* NOTE: Aborts compilation if the class file cannot be found.
-*/
-
-ReferenceBinding getTypeFromConstantPoolName(char[] signature, int start, int end) {
- if (end == -1)
- end = signature.length;
-
- char[][] compoundName = CharOperation.splitOn('/', signature, start, end);
- ReferenceBinding binding = getCachedType(compoundName);
- if (binding == null) {
- PackageBinding packageBinding = computePackageFrom(compoundName);
- binding = new UnresolvedReferenceBinding(compoundName, packageBinding);
- packageBinding.addType(binding);
- } else if (binding == TheNotFoundType) {
- problemReporter.isClassPathCorrect(compoundName, null);
- return null; // will not get here since the above error aborts the compilation
- }
- return binding;
-}
-/* Answer the type corresponding to the signature from the binary file.
-* Does not ask the oracle for the type if its not found in the cache... instead an
-* unresolved type is returned which must be resolved before used.
-*
-* NOTE: Does answer base types & array types.
-*
-* NOTE: Aborts compilation if the class file cannot be found.
-*/
-
-TypeBinding getTypeFromSignature(char[] signature, int start, int end) {
- int dimension = 0;
- while (signature[start] == '[') {
- start++;
- dimension++;
- }
- if (end == -1)
- end = signature.length - 1;
-
- // Just switch on signature[start] - the L case is the else
- TypeBinding binding = null;
- if (start == end) {
- switch (signature[start]) {
- case 'I' :
- binding = IntBinding;
- break;
- case 'Z' :
- binding = BooleanBinding;
- break;
- case 'V' :
- binding = VoidBinding;
- break;
- case 'C' :
- binding = CharBinding;
- break;
- case 'D' :
- binding = DoubleBinding;
- break;
- case 'B' :
- binding = ByteBinding;
- break;
- case 'F' :
- binding = FloatBinding;
- break;
- case 'J' :
- binding = LongBinding;
- break;
- case 'S' :
- binding = ShortBinding;
- break;
- default :
- throw new Error(Util.bind("error.undefinedBaseType",String.valueOf(signature[start]))); //$NON-NLS-1$
- }
- } else {
- binding = getTypeFromConstantPoolName(signature, start + 1, end);
- }
-
- if (dimension == 0)
- return binding;
- return createArrayType(binding, dimension);
-}
-/* Ask the oracle if a package exists named name in the package named compoundName.
-*/
-
-boolean isPackage(char[][] compoundName, char[] name) {
- if (compoundName == null || compoundName.length == 0)
- return nameEnvironment.isPackage(null, name);
- return nameEnvironment.isPackage(compoundName, name);
-}
-// The method verifier is lazily initialized to guarantee the receiver, the compiler & the oracle are ready.
-
-public MethodVerifier methodVerifier() {
- if (verifier == null)
- verifier = new MethodVerifier(this);
- return verifier;
-}
-public void reset() {
- this.defaultPackage = new PackageBinding(this); // assume the default package always exists
- this.defaultImports = null;
- this.knownPackages = new HashtableOfPackage();
-
- this.verifier = null;
- for (int i = this.uniqueArrayBindings.length; --i >= 0;)
- this.uniqueArrayBindings[i] = null;
- this.uniqueArrayBindings[0] = new ArrayBinding[50]; // start off the most common 1 dimension array @ 50
-
- for (int i = this.units.length; --i >= 0;)
- this.units[i] = null;
- this.lastUnitIndex = -1;
- this.lastCompletedUnitIndex = -1;
- this.unitBeingCompleted = null; // in case AbortException occurred
-
- // name environment has a longer life cycle, and must be reset in
- // the code which created it.
-}
-void updateArrayCache(UnresolvedReferenceBinding unresolvedType, ReferenceBinding resolvedType) {
- nextDimension : for (int i = 0, length = uniqueArrayBindings.length; i < length; i++) {
- ArrayBinding[] arrayBindings = uniqueArrayBindings[i];
- if (arrayBindings != null) {
- for (int j = 0, max = arrayBindings.length; j < max; j++) {
- ArrayBinding currentBinding = arrayBindings[j];
- if (currentBinding == null)
- continue nextDimension;
- if (currentBinding.leafComponentType == unresolvedType) {
- currentBinding.leafComponentType = resolvedType;
- continue nextDimension;
- }
- }
- }
- }
-}
-}
projects / org.ibex.tool.git / blobdiff