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AspectJ tools most notably contains the AspectJ compiler (AJC). AJC applies aspects to Java classes during compilation, fully replacing Javac for plain Java classes and also compiling native AspectJ or annotation-based @AspectJ syntax. Furthermore, AJC can weave aspects into existing class files in a post-compile binary weaving step. This library is a superset of AspectJ weaver and hence also of AspectJ runtime.

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/* *******************************************************************
 * Copyright (c) 2002 Palo Alto Research Center, Incorporated (PARC).
 * All rights reserved.
 * This program and the accompanying materials are made available
 * under the terms of the Eclipse Public License v 2.0
 * which accompanies this distribution and is available at
 * https://www.eclipse.org/org/documents/epl-2.0/EPL-2.0.txt
 *
 * Contributors:
 *     PARC     initial implementation
 * ******************************************************************/


package org.aspectj.ajdt.internal.compiler.ast;

import org.aspectj.weaver.IHasPosition;
import org.aspectj.weaver.ISourceContext;
import org.aspectj.weaver.patterns.BasicTokenSource;
import org.aspectj.weaver.patterns.Declare;
import org.aspectj.weaver.patterns.IToken;
import org.aspectj.weaver.patterns.ParserException;
import org.aspectj.weaver.patterns.PatternParser;
import org.aspectj.weaver.patterns.PerClause;
import org.aspectj.weaver.patterns.PerSingleton;
import org.aspectj.weaver.patterns.Pointcut;
import org.aspectj.weaver.patterns.TypePattern;
import org.aspectj.org.eclipse.jdt.internal.compiler.ast.ASTNode;
import org.aspectj.org.eclipse.jdt.internal.compiler.ast.MethodDeclaration;
import org.aspectj.org.eclipse.jdt.internal.compiler.ast.TypeDeclaration;
import org.aspectj.org.eclipse.jdt.internal.compiler.parser.Parser;
import org.aspectj.org.eclipse.jdt.internal.compiler.parser.TerminalTokens;


public class PseudoTokens extends ASTNode {
	BasicTokenSource tokenSource;
	PseudoToken[] tokens;  //XXX this is redundant with the field above
	String endToken;


	public PseudoTokens(PseudoToken[] tokens, ISourceContext sourceContext) {
		super();
		this.tokens = tokens;
		this.tokenSource = new BasicTokenSource(tokens, sourceContext);
		endToken = tokens[tokens.length-1].getString();
		sourceStart = tokens[0].sourceStart;
		sourceEnd = tokens[tokens.length-2].sourceEnd;
	}

	public Pointcut parsePointcut(Parser parser) {
		PatternParser patternParser = new PatternParser(tokenSource);
		try {
			Pointcut ret = patternParser.parsePointcut();
			checkEof(parser);
			return ret;
		} catch (ParserException pe) {
			reportError(parser, pe);
			return Pointcut.makeMatchesNothing(Pointcut.SYMBOLIC);
		}
	}

	private void checkEof(Parser parser) {
		IToken last = tokenSource.next();
		if (tokenSource.next() != IToken.EOF) {
			parser.problemReporter().parseError(last.getStart(), last.getEnd(),
											TerminalTokens.TokenNameIdentifier,
		                                    last.getString().toCharArray(),
		                                    last.getString(),
		                                    new String[] {endToken});
		}
	}


	private void reportError(Parser parser, ParserException pe) {
		IHasPosition tok = pe.getLocation();
		int start, end;
		if (tok == IToken.EOF) {
			start = sourceEnd+1;
			end = sourceEnd+1;
		} else {
			start = tok.getStart();
			end = tok.getEnd();
		}
		String found = "";
		if (tok instanceof IToken) {
			found = ((IToken)tok).getString();
		}

		parser.problemReporter().parseError(start, end,
											TerminalTokens.TokenNameIdentifier,
		                                    found.toCharArray(),
		                                    found,
		                                    new String[] {pe.getMessage()});
	}


	public TypePattern maybeParseDominatesPattern(Parser parser) {
		PatternParser patternParser = new PatternParser(tokenSource);
		try {
			if (patternParser.maybeEatIdentifier("dominates")) {
				// there is no eof check here
				return patternParser.parseTypePattern();
			} else {
				return null;
			}
		} catch (ParserException pe) {
			reportError(parser, pe);
			return null;
		}
	}


	public PerClause parsePerClause(Parser parser) {
		PatternParser patternParser = new PatternParser(tokenSource);
		try {
			PerClause ret = patternParser.maybeParsePerClause();
			checkEof(parser);
			if (ret == null) return new PerSingleton();
			else return ret;
		} catch (ParserException pe) {
			reportError(parser, pe);
			return new PerSingleton();
		}

	}


//	public TypePattern parseTypePattern(Parser parser) {
//	}
//
	public Declare parseDeclare(Parser parser) {
		PatternParser patternParser = new PatternParser(tokenSource);
		try {
			Declare ret = patternParser.parseDeclare();
			checkEof(parser);
			return ret;
		} catch (ParserException pe) {
			reportError(parser, pe);
			return null;
		}
	}

	public Declare parseAnnotationDeclare(Parser parser) {
		PatternParser patternParser = new PatternParser(tokenSource);
		try {
			Declare ret = patternParser.parseDeclareAnnotation();
			checkEof(parser);
			return ret;
		} catch (ParserException pe) {
			reportError(parser, pe);
			return null;
		}	}


	public void postParse(TypeDeclaration typeDec, MethodDeclaration enclosingDec) {
		int counter = 0; // Counter can be used by postParse as a value to compute uniqueness (if required)
		for (PseudoToken token : tokens) {
			counter += token.postParse(typeDec, enclosingDec, counter);
		}
	}

	/* (non-Javadoc)
	 * @see org.eclipse.jdt.internal.compiler.ast.ASTNode#print(int, java.lang.StringBuilder)
	 */
	public StringBuilder print(int indent, StringBuilder output) {
		output.append(tokenSource.toString());
		return output;
	}

}