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/*
* Copyright 2007 - 2018 ETH Zuerich, CISD and SIS.
*
* 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 ch.systemsx.cisd.hdf5;
/**
* Information about a link in an HDF5 file.
*
* @author Bernd Rinn
*/
public final class HDF5LinkInformation extends HDF5CommonInformation
{
static final HDF5LinkInformation ROOT_LINK_INFO =
new HDF5LinkInformation("/", HDF5ObjectType.GROUP, null, null);
private final String symbolicLinkTargetOrNull;
private final String externalLinkFilenameOrNull;
private final String externalLinkTargetOrNull;
private HDF5LinkInformation(String path, HDF5ObjectType type, String linkFilenameOrNull, String linkTargetOrNull)
{
super(path, type);
if (type == HDF5ObjectType.EXTERNAL_LINK && linkFilenameOrNull != null && linkTargetOrNull != null)
{
this.symbolicLinkTargetOrNull = "EXTERNAL::" + linkFilenameOrNull + "::" + linkTargetOrNull;
this.externalLinkFilenameOrNull = linkFilenameOrNull;
this.externalLinkTargetOrNull = linkTargetOrNull;
} else
{
this.symbolicLinkTargetOrNull = linkTargetOrNull;
this.externalLinkFilenameOrNull = null;
this.externalLinkTargetOrNull = null;
}
}
static HDF5LinkInformation create(String path, int typeId, String linkFilenameOrNull, String linkTargetOrNull)
{
final HDF5ObjectType type = objectTypeIdToObjectType(typeId);
return new HDF5LinkInformation(path, type, linkFilenameOrNull, linkTargetOrNull);
}
/**
* Returns the symbolic link target of this link, or <code>null</code>, if this link does not exist or is not a symbolic link.
* <p>
* Note that external links have a special format: They start with a prefix " <code>EXTERNAL::</code>", then comes the path of the external file
* (beware that this part uses the native path separator, i.e. "\" on Windows). Finally, separated by "<code>::</code> ", the path of the link in
* the external file is provided (this part always uses "/" as path separator).
*/
public String tryGetSymbolicLinkTarget()
{
return symbolicLinkTargetOrNull;
}
/**
* Returns the filename of an external link, or <code>null</code>, if this link does not exist or is not an external link.
*/
public String tryGetExternalLinkFilename()
{
return externalLinkFilenameOrNull;
}
/**
* Returns the external link target of this link, or <code>null</code>, if this link does not exist or is not an external link.
*/
public String tryGetExternalLinkTarget()
{
return externalLinkTargetOrNull;
}
/**
* Returns <code>true</code>, if the link is a soft link.
*/
public boolean isSoftLink()
{
return HDF5ObjectType.isSoftLink(type);
}
/**
* Returns <code>true</code>, if the link is an external link.
*/
public boolean isExternalLink()
{
return HDF5ObjectType.isExternalLink(type);
}
/**
* Returns <code>true</code>, if the link is either a soft link or an external link.
*/
public boolean isSymbolicLink()
{
return HDF5ObjectType.isSymbolicLink(type);
}
@Override
public int hashCode()
{
final int prime = 31;
int result = 1;
result = prime * result + ((path == null) ? 0 : path.hashCode());
return result;
}
@Override
public boolean equals(Object obj)
{
if (this == obj)
{
return true;
}
if (obj == null)
{
return false;
}
if (getClass() != obj.getClass())
{
return false;
}
final HDF5LinkInformation other = (HDF5LinkInformation) obj;
if (path == null)
{
if (other.path != null)
{
return false;
}
} else if (path.equals(other.path) == false)
{
return false;
}
return true;
}
}
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