--- /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