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/*
* Copyright 2000-2014 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.ide.caches;
import com.intellij.openapi.util.UserDataHolderBase;
import com.intellij.openapi.vfs.VirtualFile;
import com.intellij.util.ArrayUtil;
import org.jetbrains.annotations.NotNull;
import java.io.IOException;
/**
* @author max
*/
public class FileContent extends UserDataHolderBase {
private final VirtualFile myVirtualFile;
private byte[] myCachedBytes;
private long myCachedLength = -1;
private long myCachedTimeStamp = -1;
private Boolean myCachedWritable;
public FileContent(@NotNull VirtualFile virtualFile) {
myVirtualFile = virtualFile;
}
public void cache() throws IOException {
getBytes();
getLength();
getTimeStamp();
isWritable();
}
@NotNull
public byte[] getBytes() throws IOException {
if (myCachedBytes == null) {
myCachedBytes = myVirtualFile.contentsToByteArray(false);
}
return myCachedBytes;
}
public void setEmptyContent() {
myCachedBytes = ArrayUtil.EMPTY_BYTE_ARRAY;
myCachedLength = 0;
}
@NotNull
public VirtualFile getVirtualFile() {
return myVirtualFile;
}
public long getLength() {
if (myCachedLength == -1) {
myCachedLength = myVirtualFile.getLength();
}
return myCachedLength;
}
public long getTimeStamp() {
if (myCachedTimeStamp == -1) {
myCachedTimeStamp = myVirtualFile.getTimeStamp();
}
return myCachedTimeStamp;
}
public boolean isWritable() {
if (myCachedWritable == null) {
myCachedWritable = myVirtualFile.isWritable();
}
return myCachedWritable == Boolean.TRUE;
}
}
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