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/*******************************************************************************
 * Copyright (c) 2007, 2014 Codehaus.org, SpringSource, 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:
 *     Andy Clement        - Initial API and implementation
 *     Andrew Eisenberg    - additional work
 *******************************************************************************/
package org.codehaus.jdt.groovy.integration;

import org.eclipse.core.resources.IProject;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.jdt.core.IJavaElement;
import org.eclipse.jdt.core.JavaModelException;
import org.eclipse.jdt.core.WorkingCopyOwner;
import org.eclipse.jdt.core.search.IJavaSearchScope;
import org.eclipse.jdt.core.search.SearchPattern;
import org.eclipse.jdt.core.search.SearchRequestor;
import org.eclipse.jdt.internal.codeassist.complete.CompletionParser;
import org.eclipse.jdt.internal.compiler.CompilationResult;
import org.eclipse.jdt.internal.compiler.IProblemFactory;
import org.eclipse.jdt.internal.compiler.ISourceElementRequestor;
import org.eclipse.jdt.internal.compiler.SourceElementParser;
import org.eclipse.jdt.internal.compiler.ast.CompilationUnitDeclaration;
import org.eclipse.jdt.internal.compiler.env.IBinaryType;
import org.eclipse.jdt.internal.compiler.env.ICompilationUnit;
import org.eclipse.jdt.internal.compiler.impl.CompilerOptions;
import org.eclipse.jdt.internal.compiler.parser.Parser;
import org.eclipse.jdt.internal.compiler.problem.ProblemReporter;
import org.eclipse.jdt.internal.core.BinaryType;
import org.eclipse.jdt.internal.core.ClassFile;
import org.eclipse.jdt.internal.core.CompilationUnit;
import org.eclipse.jdt.internal.core.JavaProject;
import org.eclipse.jdt.internal.core.PackageFragment;
import org.eclipse.jdt.internal.core.search.indexing.IndexingParser;
import org.eclipse.jdt.internal.core.search.matching.ImportMatchLocatorParser;
import org.eclipse.jdt.internal.core.search.matching.MatchLocator;
import org.eclipse.jdt.internal.core.search.matching.MatchLocatorParser;
import org.eclipse.jdt.internal.core.search.matching.PossibleMatch;
import org.eclipse.jdt.internal.core.util.CommentRecorderParser;
import org.eclipse.jdt.internal.core.util.Util;

/**
 * The default implementation just does what JDT would do.
 */
class DefaultLanguageSupport implements LanguageSupport {

	public Parser getParser(Object requestor, CompilerOptions compilerOptions, ProblemReporter problemReporter, boolean parseLiteralExpressionsAsConstants,int variant) {
		if (variant==1) {
			return new Parser(problemReporter, parseLiteralExpressionsAsConstants);
		} else { // if (variant==2) {
			return new CommentRecorderParser(problemReporter, parseLiteralExpressionsAsConstants);
		}
	} 
	
	@Override
	public CompletionParser getCompletionParser(CompilerOptions compilerOptions, ProblemReporter problemReposrter,
			boolean storeExtraSourceEnds, IProgressMonitor monitor) {
		return new CompletionParser(problemReposrter, storeExtraSourceEnds, monitor);
	}
	
	public IndexingParser getIndexingParser(ISourceElementRequestor requestor, IProblemFactory problemFactory,
			CompilerOptions options, boolean reportLocalDeclarations, boolean optimizeStringLiterals,
			boolean useSourceJavadocParser) {
		return new IndexingParser(requestor, problemFactory, options, reportLocalDeclarations, 
				optimizeStringLiterals, useSourceJavadocParser);
	}

	public ImportMatchLocatorParser getImportMatchLocatorParserParser(ProblemReporter problemReporter,
			MatchLocator locator) {
		return new ImportMatchLocatorParser(problemReporter, locator);
	}

	public SourceElementParser getSourceElementParser(ISourceElementRequestor requestor,
			IProblemFactory problemFactory, CompilerOptions options, boolean reportLocalDeclarations,
			boolean optimizeStringLiterals, boolean useSourceJavadocParser) {
		return new SourceElementParser(requestor, problemFactory, options, reportLocalDeclarations, optimizeStringLiterals, useSourceJavadocParser);
	}

	public MatchLocatorParser getMatchLocatorParserParser(ProblemReporter problemReporter, MatchLocator locator) {
		return new MatchLocatorParser(problemReporter, locator);
	}

	public CompilationUnit newCompilationUnit(PackageFragment parent,
            String name, WorkingCopyOwner owner) {
        return new CompilationUnit(parent, name, owner);
    }

	public CompilationUnitDeclaration newCompilationUnitDeclaration(
			ICompilationUnit unit,
			ProblemReporter problemReporter, CompilationResult compilationResult, int sourceLength) {
		return new CompilationUnitDeclaration(problemReporter, compilationResult, sourceLength);
	}

    public boolean isInterestingProject(IProject project) {
        // assume that if this method is called, them this is a Java project
        return true;
    }

    public boolean isSourceFile(String fileName, boolean isInterestingProject) {
        return Util.isJavaLikeFileName(fileName);
    }

	public boolean isInterestingSourceFile(String fileName) {
		return false;
	}

	public boolean maybePerformDelegatedSearch(PossibleMatch possibleMatch, SearchPattern pattern,
			SearchRequestor requestor) {
		return false;
	}

	public EventHandler getEventHandler() {
		return DefaultEventHandler.instance;
	}
	
	static class DefaultEventHandler implements EventHandler {
		static DefaultEventHandler instance = new DefaultEventHandler();
		private DefaultEventHandler() {
			// nop
		}
		public void handle(JavaProject javaProject, String string) {
			// nop
		}
	}

	public void filterNonSourceMembers(BinaryType binaryType) {
		// nop
	}

	public IJavaSearchScope expandSearchScope(IJavaSearchScope scope, SearchPattern pattern, SearchRequestor requestor) {
	    // never expand
		return scope;
	}

	public boolean isInterestingBinary(BinaryType type, IBinaryType typeInfo) {
	    return false;
	}

	public IJavaElement[] binaryCodeSelect(ClassFile classFile, int offset, int length, WorkingCopyOwner owner) throws JavaModelException {
	    return new IJavaElement[0];
	}

	public ISupplementalIndexer getSupplementalIndexer() {
		return new NoopIndexer();
	}
}