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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;
import hdf.hdf5lib.structs.H5O_info_t;
/**
* Information about an object in an HDF5 file.
*
* @author Bernd Rinn
*/
public final class HDF5ObjectInformation extends HDF5CommonInformation
{
private final long fileNumber;
private final long address;
private final int referenceCount;
private final long creationTime;
private final long numberOfAttributes;
HDF5ObjectInformation(String path, HDF5ObjectType objectType, H5O_info_t info)
{
super(path, objectType);
this.fileNumber = info.fileno;
this.address = info.addr;
this.referenceCount = info.rc;
this.creationTime = info.ctime;
this.numberOfAttributes = info.num_attrs;
}
/**
* Returns the file number that the object is in. Can be useful when external links are
* involved.
*/
public long getFileNumber()
{
return fileNumber;
}
/**
* Returns the address of the object in the file. If the address of two links is the same, then
* they point to the same object. Can be used to spot hard or soft links.
*/
public long getAddress()
{
return address;
}
/**
* Returns the number of references that point to this object. (Number of hard links that point
* to the object).
*/
public int getReferenceCount()
{
return referenceCount;
}
/**
* Returns the time of creation of this object (as number of seconds since start of the epoch).
* Note that this only works for data set, for groups, this will always return 0.
*/
public long getCreationTime()
{
return creationTime;
}
/**
* Returns the number of attributes that is object has.
*/
public long getNumberOfAttributes()
{
return numberOfAttributes;
}
@Override
public int hashCode()
{
final int prime = 31;
int result = 1;
result = prime * result + ((path == null) ? 0 : path.hashCode());
result = prime * result + ((int) address);
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 HDF5ObjectInformation other = (HDF5ObjectInformation) obj;
if (path == null)
{
if (other.path != null)
{
return false;
}
} else if (path.equals(other.path) == false)
{
return false;
}
if (other.address != address)
{
return false;
}
return true;
}
}
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