| /* |
| * Copyright 2000-2009 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. |
| */ |
| |
| /* |
| * @author max |
| */ |
| package com.intellij.psi.stubs; |
| |
| import com.intellij.util.CompressionUtil; |
| import com.intellij.util.io.UnsyncByteArrayInputStream; |
| import org.jetbrains.annotations.NotNull; |
| import org.jetbrains.annotations.Nullable; |
| |
| import java.io.DataInput; |
| import java.io.DataOutput; |
| import java.io.IOException; |
| |
| public class SerializedStubTree { |
| private final byte[] myBytes; |
| private final int myLength; |
| private final long myByteContentLength; |
| private final int myCharContentLength; |
| private Stub myStubElement; |
| |
| public SerializedStubTree(final byte[] bytes, int length, @Nullable Stub stubElement, long byteContentLength, int charContentLength) { |
| myBytes = bytes; |
| myLength = length; |
| myByteContentLength = byteContentLength; |
| myCharContentLength = charContentLength; |
| myStubElement = stubElement; |
| } |
| |
| public SerializedStubTree(DataInput in) throws IOException { |
| myBytes = CompressionUtil.readCompressed(in); |
| myLength = myBytes.length; |
| myByteContentLength = in.readLong(); |
| myCharContentLength = in.readInt(); |
| } |
| |
| public void write(DataOutput out) throws IOException { |
| CompressionUtil.writeCompressed(out, myBytes, myLength); |
| out.writeLong(myByteContentLength); |
| out.writeInt(myCharContentLength); |
| } |
| |
| // willIndexStub is one time optimization hint, once can safely pass false |
| @NotNull |
| public Stub getStub(boolean willIndexStub) throws SerializerNotFoundException { |
| Stub stubElement = myStubElement; |
| if (stubElement != null) { |
| // not null myStubElement means we just built SerializedStubTree for indexing, |
| // if we request stub for indexing we can safely use it |
| myStubElement = null; |
| if (willIndexStub) return stubElement; |
| } |
| return SerializationManagerEx.getInstanceEx().deserialize(new UnsyncByteArrayInputStream(myBytes)); |
| } |
| |
| public boolean contentLengthMatches(long byteContentLength, int charContentLength) { |
| if (myCharContentLength >= 0 && charContentLength >= 0) { |
| return myCharContentLength == charContentLength; |
| } |
| return myByteContentLength == byteContentLength; |
| } |
| |
| public boolean equals(final Object that) { |
| if (this == that) { |
| return true; |
| } |
| if (!(that instanceof SerializedStubTree)) { |
| return false; |
| } |
| final SerializedStubTree thatTree = (SerializedStubTree)that; |
| final int length = myLength; |
| if (length != thatTree.myLength) { |
| return false; |
| } |
| |
| final byte[] thisBytes = myBytes; |
| final byte[] thatBytes = thatTree.myBytes; |
| for (int i=0; i< length; i++) { |
| if (thisBytes[i] != thatBytes[i]) { |
| return false; |
| } |
| } |
| |
| return true; |
| } |
| |
| public int hashCode() { |
| if (myBytes == null) |
| return 0; |
| |
| int result = 1; |
| for (int i = 0; i < myLength; i++) { |
| result = 31 * result + myBytes[i]; |
| } |
| |
| return result; |
| } |
| |
| } |