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package com.intellij.openapi.components.impl.stores;
import com.intellij.openapi.components.RoamingType;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import java.io.IOException;
import java.io.InputStream;
import java.util.Collection;
import java.util.Collections;
public abstract class StreamProvider {
public static final StreamProvider[] EMPTY_ARRAY = new StreamProvider[0];
public boolean isEnabled() {
return true;
}
/**
* If true, special version file per storage file will keep version of component.
* On load remote data will be ignored if local version of component is higher.
* If your storage is always in connected state (for example, git provides you local working copy), you don't need it.
*/
public boolean isVersioningRequired() {
return false;
}
/**
* fileSpec Only main fileSpec, not version
*/
public boolean isApplicable(@NotNull String fileSpec, @NotNull RoamingType roamingType) {
return true;
}
/**
* @param fileSpec
* @param content bytes of content, size of array is not actual size of data, you must use {@code size}
* @param size actual size of data
* @param roamingType
* @param async
*/
public abstract void saveContent(@NotNull String fileSpec, @NotNull byte[] content, int size, @NotNull RoamingType roamingType, boolean async) throws IOException;
@Nullable
public abstract InputStream loadContent(@NotNull String fileSpec, @NotNull RoamingType roamingType) throws IOException;
@NotNull
public Collection<String> listSubFiles(@NotNull String fileSpec, @NotNull RoamingType roamingType) {
return Collections.emptyList();
}
/**
* Delete file or directory
*/
public abstract void delete(@NotNull String fileSpec, @NotNull RoamingType roamingType);
}
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