Copyright (c) 2000, 2012 IBM Corporation and others.
This program and the accompanying materials
are made available under the terms of the Eclipse Public License 2.0
which accompanies this distribution, and is available at
https://www.eclipse.org/legal/epl-2.0/
SPDX-License-Identifier: EPL-2.0
Contributors:
    IBM Corporation - initial API and implementation
    Stephan Herrmann - Contribution for
							Bug 392238 - [1.8][compiler][null] Detect semantically invalid null type annotations
							Bug 429958 - [1.8][null] evaluate new DefaultLocation attribute of @NonNullByDefault
/*******************************************************************************
 * Copyright (c) 2000, 2012 IBM Corporation and others.
 *
 * This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License 2.0
 * which accompanies this distribution, and is available at
 * https://www.eclipse.org/legal/epl-2.0/
 *
 * SPDX-License-Identifier: EPL-2.0
 * 
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *     Stephan Herrmann - Contribution for
 *								Bug 392238 - [1.8][compiler][null] Detect semantically invalid null type annotations
 *								Bug 429958 - [1.8][null] evaluate new DefaultLocation attribute of @NonNullByDefault
 *******************************************************************************/
package org.eclipse.jdt.internal.compiler.ast;

import org.eclipse.jdt.internal.compiler.ASTVisitor;
import org.eclipse.jdt.internal.compiler.impl.CompilerOptions;
import org.eclipse.jdt.internal.compiler.lookup.*;
import org.eclipse.jdt.internal.compiler.problem.ProblemSeverities;

public class SingleTypeReference extends TypeReference {

	public char[] token;

	public SingleTypeReference(char[] source, long pos) {

			this.token = source;
			this.sourceStart = (int) (pos>>>32)  ;
			this.sourceEnd = (int) (pos & 0x00000000FFFFFFFFL) ;

	}

	@Override
	public TypeReference augmentTypeWithAdditionalDimensions(int additionalDimensions, Annotation[][] additionalAnnotations, boolean isVarargs) {
		int totalDimensions = this.dimensions() + additionalDimensions;
		Annotation [][] allAnnotations = getMergedAnnotationsOnDimensions(additionalDimensions, additionalAnnotations);
		ArrayTypeReference arrayTypeReference = new ArrayTypeReference(this.token, totalDimensions, allAnnotations, (((long) this.sourceStart) << 32) + this.sourceEnd);
		arrayTypeReference.annotations = this.annotations;
		arrayTypeReference.bits |= (this.bits & ASTNode.HasTypeAnnotations);
		if (!isVarargs)
			arrayTypeReference.extendedDimensions = additionalDimensions;
		return arrayTypeReference;
	}

	@Override
	public char[] getLastToken() {
		return this.token;
	}
	@Override
	protected TypeBinding getTypeBinding(Scope scope) {
		if (this.resolvedType != null)
			return this.resolvedType;

		this.resolvedType = scope.getType(this.token);
		
		if (this.resolvedType instanceof TypeVariableBinding) {
			TypeVariableBinding typeVariable = (TypeVariableBinding) this.resolvedType;
			if (typeVariable.declaringElement instanceof SourceTypeBinding) {
				scope.tagAsAccessingEnclosingInstanceStateOf((ReferenceBinding) typeVariable.declaringElement, true /* type variable access */);
			}
		} else if (this.resolvedType instanceof LocalTypeBinding) {
			LocalTypeBinding localType = (LocalTypeBinding) this.resolvedType;
			MethodScope methodScope = scope.methodScope();
			if (methodScope != null && !methodScope.isStatic) {
				methodScope.tagAsAccessingEnclosingInstanceStateOf(localType, false /* ! type variable access */);
			}
		}

		if (scope.kind == Scope.CLASS_SCOPE && this.resolvedType.isValidBinding())
			if (((ClassScope) scope).detectHierarchyCycle(this.resolvedType, this))
				return null;
		return this.resolvedType;
	}

	@Override
	public char [][] getTypeName() {
		return new char[][] { this.token };
	}

	@Override
	public boolean isBaseTypeReference() {
		return this.token == BYTE    ||
			   this.token == SHORT   ||
			   this.token == INT     ||
			   this.token == LONG    ||
			   this.token == FLOAT   ||
			   this.token == DOUBLE  ||
			   this.token == CHAR    ||
			   this.token == BOOLEAN ||
			   this.token == NULL    ||
			   this.token == VOID;	    
	}
	
	@Override
	public StringBuffer printExpression(int indent, StringBuffer output){
		if (this.annotations != null && this.annotations[0] != null) {
			printAnnotations(this.annotations[0], output);
			output.append(' ');
		}
		return output.append(this.token);
	}

	public TypeBinding resolveTypeEnclosing(BlockScope scope, ReferenceBinding enclosingType) {
		this.resolvedType = scope.getMemberType(this.token, enclosingType);
		boolean hasError = false;
		// https://bugs.eclipse.org/bugs/show_bug.cgi?id=391500
		resolveAnnotations(scope, 0); // defaultNullness not relevant, the only caller within the compiler: QAE
		TypeBinding memberType = this.resolvedType; // load after possible update in resolveAnnotations()
		if (!memberType.isValidBinding()) {
			hasError = true;
			scope.problemReporter().invalidEnclosingType(this, memberType, enclosingType);
			memberType = ((ReferenceBinding)memberType).closestMatch();
			if (memberType == null) {
				return null;
			}
		}
		if (isTypeUseDeprecated(memberType, scope))
			reportDeprecatedType(memberType, scope);
		memberType = scope.environment().convertToRawType(memberType, false /*do not force conversion of enclosing types*/);
		if (memberType.isRawType()
				&& (this.bits & IgnoreRawTypeCheck) == 0
				&& scope.compilerOptions().getSeverity(CompilerOptions.RawTypeReference) != ProblemSeverities.Ignore){
			scope.problemReporter().rawTypeReference(this, memberType);
		}
		if (hasError) {
			// do not store the computed type, keep the problem type instead
			return memberType;
		}
		return this.resolvedType = memberType;
	}

	@Override
	public void traverse(ASTVisitor visitor, BlockScope scope) {
		if (visitor.visit(this, scope)) {
			if (this.annotations != null) {
				Annotation [] typeAnnotations = this.annotations[0];
				for (int i = 0, length = typeAnnotations == null ? 0 : typeAnnotations.length; i < length; i++)
					typeAnnotations[i].traverse(visitor, scope);
			}
		}
		visitor.endVisit(this, scope);
	}

	@Override
	public void traverse(ASTVisitor visitor, ClassScope scope) {
		if (visitor.visit(this, scope)) {
			if (this.annotations != null) {
				Annotation [] typeAnnotations = this.annotations[0];
				for (int i = 0, length = typeAnnotations == null ? 0 : typeAnnotations.length; i < length; i++)
					typeAnnotations[i].traverse(visitor, scope);
			}
		}
		visitor.endVisit(this, scope);
	}
}