Copyright (c) 2000, 2017 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
/*******************************************************************************
 * Copyright (c) 2000, 2017 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
 *******************************************************************************/
package org.eclipse.jdt.internal.compiler.ast;

import java.util.HashSet;
import java.util.Set;

import org.eclipse.jdt.internal.compiler.ASTVisitor;
import org.eclipse.jdt.internal.compiler.classfmt.ClassFileConstants;
import org.eclipse.jdt.internal.compiler.impl.CompilerOptions;
import org.eclipse.jdt.internal.compiler.lookup.*;

public class ImportReference extends ASTNode {

	public char[][] tokens;
	public long[] sourcePositions; //each entry is using the code : (start<<32) + end
	public int declarationEnd; // doesn't include an potential trailing comment
	public int declarationSourceStart;
	public int declarationSourceEnd;
	public int modifiers; // 1.5 addition for static imports
	public Annotation[] annotations;
	// star end position
	public int trailingStarPosition;

	public ImportReference(
			char[][] tokens,
			long[] sourcePositions,
			boolean onDemand,
			int modifiers) {

		this.tokens = tokens;
		this.sourcePositions = sourcePositions;
		if (onDemand) {
			this.bits |= ASTNode.OnDemand;
		}
		this.sourceEnd = (int) (sourcePositions[sourcePositions.length-1] & 0x00000000FFFFFFFF);
		this.sourceStart = (int) (sourcePositions[0] >>> 32);
		this.modifiers = modifiers;
	}

	public boolean isStatic() {
		return (this.modifiers & ClassFileConstants.AccStatic) != 0;
	}

	
Returns:
char[][]/**
	 * @return char[][]
	 */
	public char[][] getImportName() {

		return this.tokens;
	}

	public void checkPackageConflict(CompilationUnitScope scope) {
		ModuleBinding module = scope.module();
		PackageBinding visiblePackage = module.getVisiblePackage(this.tokens);
		if (visiblePackage instanceof SplitPackageBinding) {
			Set<ModuleBinding> declaringMods = new HashSet<>();
			for (PackageBinding incarnation : ((SplitPackageBinding) visiblePackage).incarnations) {
				if (incarnation.enclosingModule != module && module.canAccess(incarnation))
					declaringMods.add(incarnation.enclosingModule);
			}
			if (!declaringMods.isEmpty()) {
				CompilerOptions compilerOptions = scope.compilerOptions();
				boolean inJdtDebugCompileMode = compilerOptions.enableJdtDebugCompileMode;
				if (!inJdtDebugCompileMode) {
					scope.problemReporter().conflictingPackagesFromOtherModules(this, declaringMods);
				}
			}
		}
	}

	@Override
	public StringBuffer print(int indent, StringBuffer output) {

		return print(indent, output, true);
	}

	public StringBuffer print(int tab, StringBuffer output, boolean withOnDemand) {

		/* when withOnDemand is false, only the name is printed */
		for (int i = 0; i < this.tokens.length; i++) {
			if (i > 0) output.append('.');
			output.append(this.tokens[i]);
		}
		if (withOnDemand && ((this.bits & ASTNode.OnDemand) != 0)) {
			output.append(".*"); //$NON-NLS-1$
		}
		return output;
	}

	public void traverse(ASTVisitor visitor, CompilationUnitScope scope) {
		// annotations are traversed during the compilation unit traversal using a class scope
		visitor.visit(this, scope);
		visitor.endVisit(this, scope);
	}
}