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/*
* Copyright 2000-2013 JetBrains s.r.o.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.intellij.psi.search.scope.packageSet;
import com.intellij.analysis.AnalysisScopeBundle;
import com.intellij.lexer.Lexer;
import com.intellij.openapi.diagnostic.Logger;
import com.intellij.openapi.extensions.Extensions;
import com.intellij.psi.TokenType;
import com.intellij.psi.search.scope.packageSet.lexer.ScopeTokenTypes;
import com.intellij.psi.search.scope.packageSet.lexer.ScopesLexer;
import org.jetbrains.annotations.Nullable;
public class PackageSetFactoryImpl extends PackageSetFactory {
private static final Logger LOG = Logger.getInstance("#com.intellij.psi.search.scope.packageSet.PackageSetFactoryImpl");
@Override
public PackageSet compile(String text) throws ParsingException {
Lexer lexer = new ScopesLexer();
lexer.start(text);
return new Parser(lexer).parse();
}
private static class Parser {
private final Lexer myLexer;
public Parser(Lexer lexer) {
myLexer = lexer;
}
public PackageSet parse() throws ParsingException {
PackageSet set = parseUnion();
if (myLexer.getTokenType() != null) error(AnalysisScopeBundle.message("error.packageset.token.expectations", getTokenText()));
return set;
}
private PackageSet parseUnion() throws ParsingException {
PackageSet result = parseIntersection();
while (true) {
if (myLexer.getTokenType() != ScopeTokenTypes.OROR) break;
myLexer.advance();
result = new UnionPackageSet(result, parseIntersection());
}
return result;
}
private PackageSet parseIntersection() throws ParsingException {
PackageSet result = parseTerm();
while (true) {
if (myLexer.getTokenType() != ScopeTokenTypes.ANDAND) break;
myLexer.advance();
result = new IntersectionPackageSet(result, parseTerm());
}
return result;
}
private PackageSet parseTerm() throws ParsingException {
if (myLexer.getTokenType() == ScopeTokenTypes.EXCL) {
myLexer.advance();
return new ComplementPackageSet(parseTerm());
}
if (myLexer.getTokenType() == ScopeTokenTypes.LPARENTH) return parseParenthesized();
if (myLexer.getTokenType() == ScopeTokenTypes.IDENTIFIER && myLexer.getBufferSequence().charAt(myLexer.getTokenStart()) == '$') {
NamedPackageSetReference namedPackageSetReference = new NamedPackageSetReference(getTokenText());
myLexer.advance();
return namedPackageSetReference;
}
return parsePattern();
}
private PackageSet parsePattern() throws ParsingException {
String scope = null;
for (PackageSetParserExtension extension : Extensions.getExtensions(PackageSetParserExtension.EP_NAME)) {
scope = extension.parseScope(myLexer);
if (scope != null) break;
}
if (scope == null) error("Unknown scope type");
String modulePattern = parseModulePattern();
if (myLexer.getTokenType() == ScopeTokenTypes.COLON) {
myLexer.advance();
}
for (PackageSetParserExtension extension : Extensions.getExtensions(PackageSetParserExtension.EP_NAME)) {
final PackageSet packageSet = extension.parsePackageSet(myLexer, scope, modulePattern);
if (packageSet != null) return packageSet;
}
error("Unknown scope type");
return null; //not reachable
}
private String getTokenText() {
int start = myLexer.getTokenStart();
int end = myLexer.getTokenEnd();
return myLexer.getBufferSequence().subSequence(start, end).toString();
}
@Nullable
private String parseModulePattern() throws ParsingException {
if (myLexer.getTokenType() != ScopeTokenTypes.LBRACKET) return null;
myLexer.advance();
StringBuffer pattern = new StringBuffer();
while (true) {
if (myLexer.getTokenType() == ScopeTokenTypes.RBRACKET ||
myLexer.getTokenType() == null) {
myLexer.advance();
break;
} else if (myLexer.getTokenType() == ScopeTokenTypes.ASTERISK) {
pattern.append("*");
} else if (myLexer.getTokenType() == ScopeTokenTypes.IDENTIFIER ||
myLexer.getTokenType() == TokenType.WHITE_SPACE ||
myLexer.getTokenType() == ScopeTokenTypes.INTEGER_LITERAL ) {
pattern.append(getTokenText());
} else if (myLexer.getTokenType() == ScopeTokenTypes.DOT) {
pattern.append(".");
} else if (myLexer.getTokenType() == ScopeTokenTypes.MINUS) {
pattern.append("-");
} else if (myLexer.getTokenType() == ScopeTokenTypes.TILDE) {
pattern.append("~");
} else if (myLexer.getTokenType() == ScopeTokenTypes.SHARP) {
pattern.append("#");
}
else if (myLexer.getTokenType() == ScopeTokenTypes.COLON) {
pattern.append(":");
} else {
pattern.append(getTokenText());
}
myLexer.advance();
}
if (pattern.length() == 0) {
error(AnalysisScopeBundle.message("error.packageset.pattern.expectations"));
}
return pattern.toString();
}
private PackageSet parseParenthesized() throws ParsingException {
LOG.assertTrue(myLexer.getTokenType() == ScopeTokenTypes.LPARENTH);
myLexer.advance();
PackageSet result = parseUnion();
if (myLexer.getTokenType() != ScopeTokenTypes.RPARENTH) error(AnalysisScopeBundle.message("error.packageset.rparen.expected"));
myLexer.advance();
return result;
}
private void error(String message) throws ParsingException {
throw new ParsingException(
AnalysisScopeBundle.message("error.packageset.position.parsing.error", message, (myLexer.getTokenStart() + 1)));
}
}
}
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