/*******************************************************************************
 * Copyright (c) 2000, 2005 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.jdt.core.tests.performance;

import java.io.PrintStream;
import java.text.NumberFormat;
import java.util.Hashtable;
import java.util.List;

import junit.framework.*;

import org.eclipse.jdt.core.*;
import org.eclipse.jdt.core.dom.*;
import org.eclipse.jdt.core.dom.QualifiedName;

/**
 */
public class FullSourceWorkspaceASTTests extends FullSourceWorkspaceTests {

    // Tests counter
    private static int TESTS_COUNT = 0;
	private final static int ITERATIONS_COUNT = 10;
	int nodesCount = 0;

    // Log files
    private static PrintStream[] LOG_STREAMS = new PrintStream[LOG_TYPES.length];

	/**
	 * @param name
	 */
	public FullSourceWorkspaceASTTests(String name) {
		super(name);
	}

	static {
		TESTS_PREFIX = "testPerfDom";
	}

	public static Test suite() {
        Test suite = buildSuite(testClass());
        TESTS_COUNT = suite.countTestCases();
        createPrintStream(testClass(), LOG_STREAMS, TESTS_COUNT, null);
        return suite;
    }

    private static Class testClass() {
        return FullSourceWorkspaceASTTests.class;
    }

    protected void setUp() throws Exception {
		waitUntilIndexesReady();
		super.setUp();
	}

	/* (non-Javadoc)
     * @see junit.framework.TestCase#tearDown()
     */
    protected void tearDown() throws Exception {

		// End of execution => one test less
        TESTS_COUNT--;

        // Log perf result
        if (LOG_DIR != null) {
            logPerfResult(LOG_STREAMS, TESTS_COUNT);
        }
		
		// Print statistics
        if (TESTS_COUNT == 0) {
			System.out.println("-------------------------------------");
			System.out.println("DOM/AST creation performance test statistics:");
			NumberFormat intFormat = NumberFormat.getIntegerInstance();
			System.out.println("  - "+intFormat.format(this.nodesCount)+" nodes have been parsed.");
			System.out.println("-------------------------------------\n");
        }

		// Call super at the end as it close print streams
        super.tearDown();
	}

	/**
	 * Comment Mapper visitor
	 */
	class CommentMapperASTVisitor extends ASTVisitor {
		CompilationUnit compilationUnit;
		int nodes = 0;
		int extendedStartPositions = 0;
		int extendedEndPositions = 0;

		public CommentMapperASTVisitor(CompilationUnit unit) {
			this.compilationUnit = unit;
		}
		protected boolean visitNode(ASTNode node) {
			// get node positions and extended positions
			int nodeStart = node.getStartPosition();
			int nodeEnd = node.getLength() - 1 - nodeStart;
			int extendedStart = this.compilationUnit.getExtendedStartPosition(node);
			int extendedEnd = this.compilationUnit.getExtendedLength(node) - 1 - extendedStart;
			// update counters
			if (extendedStart < nodeStart) this.extendedStartPositions++;
			if (extendedEnd > nodeEnd) this.extendedEndPositions++;
			this.nodes++;
			return true;
		}
		protected void endVisitNode(ASTNode node) {
			// do nothing
		}
		public boolean visit(AnonymousClassDeclaration node) {
			return visitNode(node);
		}
		public boolean visit(ArrayAccess node) {
			return visitNode(node);
		}
		public boolean visit(ArrayCreation node) {
			return visitNode(node);
		}
		public boolean visit(ArrayInitializer node) {
			return visitNode(node);
		}
		public boolean visit(ArrayType node) {
			visitNode(node);
			return false;
		}
		public boolean visit(AssertStatement node) {
			return visitNode(node);
		}
		public boolean visit(Assignment node) {
			return visitNode(node);
		}
		public boolean visit(Block node) {
			return visitNode(node);
		}
		public boolean visit(BooleanLiteral node) {
			return visitNode(node);
		}
		public boolean visit(BreakStatement node) {
			return visitNode(node);
		}
		public boolean visit(CastExpression node) {
			return visitNode(node);
		}
		public boolean visit(CatchClause node) {
			return visitNode(node);
		}
		public boolean visit(CharacterLiteral node) {
			return visitNode(node);
		}
		public boolean visit(ClassInstanceCreation node) {
			return visitNode(node);
		}
		public boolean visit(CompilationUnit node) {
			return visitNode(node);
		}
		public boolean visit(ConditionalExpression node) {
			return visitNode(node);
		}
		public boolean visit(ConstructorInvocation node) {
			return visitNode(node);
		}
		public boolean visit(ContinueStatement node) {
			return visitNode(node);
		}
		public boolean visit(DoStatement node) {
			return visitNode(node);
		}
		public boolean visit(EmptyStatement node) {
			return visitNode(node);
		}
		public boolean visit(ExpressionStatement node) {
			return visitNode(node);
		}
		public boolean visit(FieldAccess node) {
			return visitNode(node);
		}
		public boolean visit(FieldDeclaration node) {
			return visitNode(node);
		}
		public boolean visit(ForStatement node) {
			return visitNode(node);
		}
		public boolean visit(IfStatement node) {
			return visitNode(node);
		}
		public boolean visit(ImportDeclaration node) {
			return visitNode(node);
		}
		public boolean visit(InfixExpression node) {
			return visitNode(node);
		}
		public boolean visit(InstanceofExpression node) {
			return visitNode(node);
		}
		public boolean visit(Initializer node) {
			return visitNode(node);
		}
		public boolean visit(Javadoc node) {
			// do not visit Javadoc tags by default. Use constructor with
			// boolean to enable.
			if (super.visit(node)) { return visitNode(node); }
			return false;
		}
		public boolean visit(LabeledStatement node) {
			return visitNode(node);
		}
		public boolean visit(MethodDeclaration node) {
			return visitNode(node);
		}
		public boolean visit(MethodInvocation node) {
			return visitNode(node);
		}
		public boolean visit(NullLiteral node) {
			return visitNode(node);
		}
		public boolean visit(NumberLiteral node) {
			return visitNode(node);
		}
		public boolean visit(PackageDeclaration node) {
			return visitNode(node);
		}
		public boolean visit(ParenthesizedExpression node) {
			return visitNode(node);
		}
		public boolean visit(PostfixExpression node) {
			return visitNode(node);
		}
		public boolean visit(PrefixExpression node) {
			return visitNode(node);
		}
		public boolean visit(PrimitiveType node) {
			return visitNode(node);
		}
		public boolean visit(QualifiedName node) {
			return visitNode(node);
		}
		public boolean visit(ReturnStatement node) {
			return visitNode(node);
		}
		public boolean visit(SimpleName node) {
			return visitNode(node);
		}
		public boolean visit(SimpleType node) {
			return visitNode(node);
		}
		public boolean visit(StringLiteral node) {
			return visitNode(node);
		}
		public boolean visit(SuperConstructorInvocation node) {
			return visitNode(node);
		}
		public boolean visit(SuperFieldAccess node) {
			return visitNode(node);
		}
		public boolean visit(SuperMethodInvocation node) {
			return visitNode(node);
		}
		public boolean visit(SwitchCase node) {
			return visitNode(node);
		}
		public boolean visit(SwitchStatement node) {
			return visitNode(node);
		}
		public boolean visit(SynchronizedStatement node) {
			return visitNode(node);
		}
		public boolean visit(ThisExpression node) {
			return visitNode(node);
		}
		public boolean visit(ThrowStatement node) {
			return visitNode(node);
		}
		public boolean visit(TryStatement node) {
			return visitNode(node);
		}
		public boolean visit(TypeDeclaration node) {
			return visitNode(node);
		}
		public boolean visit(TypeDeclarationStatement node) {
			return visitNode(node);
		}
		public boolean visit(TypeLiteral node) {
			return visitNode(node);
		}
		public boolean visit(SingleVariableDeclaration node) {
			return visitNode(node);
		}
		public boolean visit(VariableDeclarationExpression node) {
			return visitNode(node);
		}
		public boolean visit(VariableDeclarationStatement node) {
			return visitNode(node);
		}
		public boolean visit(VariableDeclarationFragment node) {
			return visitNode(node);
		}
		public boolean visit(WhileStatement node) {
			return visitNode(node);
		}
		/* since 3.0 */
		public boolean visit(BlockComment node) {
			return visitNode(node);
		}
		public boolean visit(LineComment node) {
			return visitNode(node);
		}
		public boolean visit(MemberRef node) {
			return visitNode(node);
		}
		public boolean visit(MethodRef node) {
			return visitNode(node);
		}
		public boolean visit(MethodRefParameter node) {
			return visitNode(node);
		}
		public boolean visit(TagElement node) {
			return visitNode(node);
		}
		public boolean visit(TextElement node) {
			return visitNode(node);
		}
		public void endVisit(AnonymousClassDeclaration node) {
			endVisitNode(node);
		}
		public void endVisit(ArrayAccess node) {
			endVisitNode(node);
		}
		public void endVisit(ArrayCreation node) {
			endVisitNode(node);
		}
		public void endVisit(ArrayInitializer node) {
			endVisitNode(node);
		}
		public void endVisit(ArrayType node) {
			endVisitNode(node);
		}
		public void endVisit(AssertStatement node) {
			endVisitNode(node);
		}
		public void endVisit(Assignment node) {
			endVisitNode(node);
		}
		public void endVisit(Block node) {
			endVisitNode(node);
		}
		public void endVisit(BooleanLiteral node) {
			endVisitNode(node);
		}
		public void endVisit(BreakStatement node) {
			endVisitNode(node);
		}
		public void endVisit(CastExpression node) {
			endVisitNode(node);
		}
		public void endVisit(CatchClause node) {
			endVisitNode(node);
		}
		public void endVisit(CharacterLiteral node) {
			endVisitNode(node);
		}
		public void endVisit(ClassInstanceCreation node) {
			endVisitNode(node);
		}
		public void endVisit(CompilationUnit node) {
			endVisitNode(node);
		}
		public void endVisit(ConditionalExpression node) {
			endVisitNode(node);
		}
		public void endVisit(ConstructorInvocation node) {
			endVisitNode(node);
		}
		public void endVisit(ContinueStatement node) {
			endVisitNode(node);
		}
		public void endVisit(DoStatement node) {
			endVisitNode(node);
		}
		public void endVisit(EmptyStatement node) {
			endVisitNode(node);
		}
		public void endVisit(ExpressionStatement node) {
			endVisitNode(node);
		}
		public void endVisit(FieldAccess node) {
			endVisitNode(node);
		}
		public void endVisit(FieldDeclaration node) {
			endVisitNode(node);
		}
		public void endVisit(ForStatement node) {
			endVisitNode(node);
		}
		public void endVisit(IfStatement node) {
			endVisitNode(node);
		}
		public void endVisit(ImportDeclaration node) {
			endVisitNode(node);
		}
		public void endVisit(InfixExpression node) {
			endVisitNode(node);
		}
		public void endVisit(InstanceofExpression node) {
			endVisitNode(node);
		}
		public void endVisit(Initializer node) {
			endVisitNode(node);
		}
		public void endVisit(Javadoc node) {
			endVisitNode(node);
		}
		public void endVisit(LabeledStatement node) {
			endVisitNode(node);
		}
		public void endVisit(MethodDeclaration node) {
			endVisitNode(node);
		}
		public void endVisit(MethodInvocation node) {
			endVisitNode(node);
		}
		public void endVisit(NullLiteral node) {
			endVisitNode(node);
		}
		public void endVisit(NumberLiteral node) {
			endVisitNode(node);
		}
		public void endVisit(PackageDeclaration node) {
			endVisitNode(node);
		}
		public void endVisit(ParenthesizedExpression node) {
			endVisitNode(node);
		}
		public void endVisit(PostfixExpression node) {
			endVisitNode(node);
		}
		public void endVisit(PrefixExpression node) {
			endVisitNode(node);
		}
		public void endVisit(PrimitiveType node) {
			endVisitNode(node);
		}
		public void endVisit(QualifiedName node) {
			endVisitNode(node);
		}
		public void endVisit(ReturnStatement node) {
			endVisitNode(node);
		}
		public void endVisit(SimpleName node) {
			endVisitNode(node);
		}
		public void endVisit(SimpleType node) {
			endVisitNode(node);
		}
		public void endVisit(StringLiteral node) {
			endVisitNode(node);
		}
		public void endVisit(SuperConstructorInvocation node) {
			endVisitNode(node);
		}
		public void endVisit(SuperFieldAccess node) {
			endVisitNode(node);
		}
		public void endVisit(SuperMethodInvocation node) {
			endVisitNode(node);
		}
		public void endVisit(SwitchCase node) {
			endVisitNode(node);
		}
		public void endVisit(SwitchStatement node) {
			endVisitNode(node);
		}
		public void endVisit(SynchronizedStatement node) {
			endVisitNode(node);
		}
		public void endVisit(ThisExpression node) {
			endVisitNode(node);
		}
		public void endVisit(ThrowStatement node) {
			endVisitNode(node);
		}
		public void endVisit(TryStatement node) {
			endVisitNode(node);
		}
		public void endVisit(TypeDeclaration node) {
			endVisitNode(node);
		}
		public void endVisit(TypeDeclarationStatement node) {
			endVisitNode(node);
		}
		public void endVisit(TypeLiteral node) {
			endVisitNode(node);
		}
		public void endVisit(SingleVariableDeclaration node) {
			endVisitNode(node);
		}
		public void endVisit(VariableDeclarationExpression node) {
			endVisitNode(node);
		}
		public void endVisit(VariableDeclarationStatement node) {
			endVisitNode(node);
		}
		public void endVisit(VariableDeclarationFragment node) {
			endVisitNode(node);
		}
		public void endVisit(WhileStatement node) {
			endVisitNode(node);
		}
		/* since 3.0 */
		public void endVisit(BlockComment node) {
			endVisitNode(node);
		}
		public void endVisit(LineComment node) {
			endVisitNode(node);
		}
		public void endVisit(MemberRef node) {
			endVisitNode(node);
		}
		public void endVisit(MethodRef node) {
			endVisitNode(node);
		}
		public void endVisit(MethodRefParameter node) {
			endVisitNode(node);
		}
		public void endVisit(TagElement node) {
			endVisitNode(node);
		}
		public void endVisit(TextElement node) {
			endVisitNode(node);
		}
	}

	private void createAST(ICompilationUnit unit, int astLevel) throws JavaModelException {

		// Warm up
		for (int i = 0; i < 2; i++) {
			ASTParser parser = ASTParser.newParser(astLevel);
			parser.setSource(unit);
			parser.setResolveBindings(false);
			parser.createAST(null);
		}
		
		// Clean memory
		runGc();
		
		// Measures
		for (int i = 0; i < MEASURES_COUNT; i++) {
			ASTNode result = null;
			startMeasuring();
			for (int j=0; j<ITERATIONS_COUNT; j++) {
				ASTParser parser = ASTParser.newParser(astLevel);
				parser.setSource(unit);
				parser.setResolveBindings(false);
				result = parser.createAST(null);
			}
			stopMeasuring();
			assertEquals("Wrong type for node"+result, result.getNodeType(), ASTNode.COMPILATION_UNIT);
			CompilationUnit compilationUnit = (CompilationUnit) result;
			CommentMapperASTVisitor visitor = new CommentMapperASTVisitor(compilationUnit);
			compilationUnit.accept(visitor);
			nodesCount += visitor.nodes * ITERATIONS_COUNT;
		}

		// Commit
		commitMeasurements();
		assertPerformance();
	}

	// Do NOT forget that tests must start with "testPerf"
	/**
	 * @deprecated To reduce deprecated warnings
	 */
	public void testDomAstCreationJLS2() throws JavaModelException {
		tagAsSummary("DOM>Creation>Src>JLS2", true); // put in fingerprint

		ICompilationUnit unit = getCompilationUnit("org.eclipse.jdt.core", "org.eclipse.jdt.internal.compiler.parser", "Parser.java");
		Hashtable options = JavaCore.getOptions();
		options.put(JavaCore.COMPILER_PB_NON_NLS_STRING_LITERAL, JavaCore.IGNORE);
		JavaCore.setOptions(options);
		createAST(unit, AST.JLS2);
	}

	/**
	 * Removed as there's no reference to compare with
	 * TODO (frederic) put back post 3.1
	 */
	public void _testDomAstCreationJLS3() throws JavaModelException {
		tagAsSummary("DOM>Creation>Src>JLS3", true); // put in fingerprint

		ICompilationUnit unit = getCompilationUnit("org.eclipse.jdt.core", "org.eclipse.jdt.internal.compiler.parser", "Parser.java");
		createAST(unit, AST.JLS3);
	}

	private int runAstCreation(int astLevel) throws JavaModelException {
		int unitsCount = 0;
		startMeasuring();
		if (DEBUG) System.out.println("Creating AST hierarchy for all units of projects:");
		for (int i = 0; i < ALL_PROJECTS.length; i++) {
			// Get project compilation units
			if (DEBUG) System.out.print("\t- "+ALL_PROJECTS[i].getElementName());
			List units = getProjectCompilationUnits(ALL_PROJECTS[i]);
			int size = units.size();
			if (size == 0) {
				if (DEBUG) System.out.println(": empty!");
				continue;
			}
			unitsCount += size;
			List unitsArrays = splitListInSmallArrays(units, 20);
			int n = unitsArrays.size();
			if (DEBUG)
				if (n==1)
					System.out.print(": "+size+" units to proceed ("+n+" step): ");
				else
					System.out.print(": "+size+" units to proceed ("+n+" steps): ");
			while (unitsArrays.size() > 0) {
				ICompilationUnit[] unitsArray = (ICompilationUnit[]) unitsArrays.remove(0);
				if (DEBUG) System.out.print('.');
				int length = unitsArray.length;
				CompilationUnit[] compilationUnits = new CompilationUnit[length];
				// Create AST tree
				for (int ptr=0; ptr<length; ptr++) {
					ICompilationUnit unit = unitsArray[ptr];
					unitsArray[ptr] = null; // release memory handle
					ASTParser parser = ASTParser.newParser(astLevel);
					parser.setSource(unit);
					parser.setResolveBindings(false);
					ASTNode result = parser.createAST(null);
					assertEquals("Wrong type for node"+result, result.getNodeType(), ASTNode.COMPILATION_UNIT);
					compilationUnits[ptr] = (CompilationUnit) result;
				}
			}
			if (DEBUG) System.out.println(" done!");
		}
		stopMeasuring();
		commitMeasurements();
		assertPerformance();
		return unitsCount;
	}

	/**
	 * @deprecated To reduce deprecated warnings
	 */
	public void testWkspDomAstCreationJLS2() throws JavaModelException {
		tagAsSummary("DOM>Creation>Wksp>JLS2", true); // put in fingerprint
		runAstCreation(AST.JLS2);
	}

	/**
	 * Removed as there's no reference to compare with
	 * TODO (frederic) put back post 3.1
	 */
	public void _testWkspDomAstCreationJLS3() throws JavaModelException {
		tagAsSummary("DOM>Creation>Wksp>JLS3", true); // put in fingerprint
		runAstCreation(AST.JLS3);
	}
}