java/java-impl/src/com/intellij/psi/impl/source/JavaFileElementType.java

   1 /*
   2  * Copyright 2000-2009 JetBrains s.r.o.
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  * http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16
  17 /*
  18  * @author max
  19  */
  20 package com.intellij.psi.impl.source;
  21
  22 import com.intellij.lang.ASTNode;
  23 import com.intellij.lang.StdLanguages;
  24 import com.intellij.lexer.JavaLexer;
  25 import com.intellij.openapi.vfs.VirtualFile;
  26 import com.intellij.pom.java.LanguageLevel;
  27 import com.intellij.psi.PsiManager;
  28 import com.intellij.psi.StubBuilder;
  29 import com.intellij.psi.impl.java.stubs.PsiJavaFileStub;
  30 import com.intellij.psi.impl.java.stubs.impl.PsiJavaFileStubImpl;
  31 import com.intellij.psi.impl.source.parsing.FileTextParsing;
  32 import com.intellij.psi.impl.source.tree.FileElement;
  33 import com.intellij.psi.stubs.IndexSink;
  34 import com.intellij.psi.stubs.StubElement;
  35 import com.intellij.psi.stubs.StubInputStream;
  36 import com.intellij.psi.stubs.StubOutputStream;
  37 import com.intellij.psi.tree.IStubFileElementType;
  38 import com.intellij.psi.util.PsiUtil;
  39 import com.intellij.util.io.StringRef;
  40
  41 import java.io.IOException;
  42
  43 public class JavaFileElementType extends IStubFileElementType<PsiJavaFileStub> {
  44   public static final int STUB_VERSION = 3;
  45
  46   public JavaFileElementType() {
  47     super("java.FILE", StdLanguages.JAVA);
  48   }
  49
  50   public StubBuilder getBuilder() {
  51     return new JavaFileStubBuilder();
  52   }
  53
  54   public int getStubVersion() {
  55     return STUB_VERSION;
  56   }
  57
  58   @Override
  59   public boolean shouldBuildStubFor(final VirtualFile file) {
  60     final VirtualFile dir = file.getParent();
  61     return dir == null || dir.getUserData(LanguageLevel.KEY) != null;
  62   }
  63
  64   public ASTNode parseContents(ASTNode chameleon) {
  65     FileElement node = (FileElement)chameleon;
  66     final CharSequence seq = node.getChars();
  67
  68     final PsiManager manager = node.getManager();
  69     final JavaLexer lexer = new JavaLexer(PsiUtil.getLanguageLevel(node.getPsi()));
  70     return FileTextParsing.parseFileText(manager, lexer, seq, 0, seq.length(), node.getCharTable());
  71   }
  72
  73   public String getExternalId() {
  74     return "java.FILE";
  75   }
  76
  77   public void serialize(final PsiJavaFileStub stub, final StubOutputStream dataStream)
  78       throws IOException {
  79     dataStream.writeBoolean(stub.isCompiled());
  80     dataStream.writeName(stub.getPackageName());
  81   }
  82
  83   public PsiJavaFileStub deserialize(final StubInputStream dataStream, final StubElement parentStub) throws IOException {
  84     boolean compiled = dataStream.readBoolean();
  85     StringRef packName = dataStream.readName();
  86     return new PsiJavaFileStubImpl(packName, compiled);
  87   }
  88
  89   public void indexStub(final PsiJavaFileStub stub, final IndexSink sink) {
  90   }
  91 }