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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;
/**
* An interface for reading HDF5 files (HDF5 1.10.x and older).
* <p>
* Obtain an object implementing this interface by calling {@link HDF5Factory#openForReading(String)}
* or {@link IHDF5ReaderConfigurator#reader()}.
* <p>
* The interface focuses on ease of use instead of completeness. As a consequence not all features
* of HDF5 are supported by this class, however it covers a large subset. In particular all
* information written by {@link IHDF5Writer} can be read by this class.
* <p>
* The functionality is being made available in two ways:
* <ol>
* <li>{@link IHDF5SimpleReader} contains the most important methods in one interface. If you are
* new to the library, this is a good starting point, see the example code below.</li>
* <li>The hierarchical ("quasi-fluent") API provides the full functionality. It is designed along
* the data types supported by JHDF5.
* <ul>
* <li>{@link #file()}: File-level information and operations, has e.g. the
* {@link IHDF5FileLevelReadOnlyHandler#close()} method.</li>
* <li>{@link #object()}: Object-level information, where "objects" can be data sets, links, groups
* or data types, following the concept of an HDF5 object. Here you can find for example the method
* {@link IHDF5ObjectReadOnlyInfoProviderHandler#getGroupMemberInformation(String, boolean)} which
* gives you information on the members of a group and the method
* {@link IHDF5ObjectReadOnlyInfoProviderHandler#tryGetSymbolicLinkTarget(String)} for resolving a
* symbolic link.</li>
* <li>{@link #bool()}: Reader methods for boolean data sets, including bit fields.</li>
* <li>{@link #int8()} / {@link #int16()} / {@link #int16()} / {@link #int32()} / {@link #int64()}:
* Reader methods for integer data sets, where the number as part of the method name denotes the
* size of the integer type. The methods will always read signed integers, if you need unsigned
* integers, you need to convert them with one of the methods in {@link UnsignedIntUtils}.</li>
* <li>{@link #float32()} / {@link #float64()}: Reader methods for float data sets, where the number
* as part of the name sets the size of the float type.</li>
* <li>{@link #time()} / {@link #duration()}: Reader methods for time stamp (or date) and for time
* duration data sets.</li>
* <li>{@link #string()}: Reader methods for string data sets.</li>
* <li>{@link #enumeration()}: Reader methods for enumeration data sets.</li>
* <li>{@link #compound()}: Reader methods for compound data sets.</li>
* <li>{@link #opaque()}: Reader methods for data sets that are "black boxes" to HDF5 which are
* called "opaque data sets" in HDF5 jargon. Here you can also find methods of reading arbitrary
* data sets as byte arrays.</li>
* <li>{@link #reference()}: Reader methods for HDF5 object references. Note that object references,
* though similar to hard links and symbolic links on the first glance, are quite different for
* HDF5.</li>
* </ul>
* </li>
* </ol>
* <p>
* Usage example for {@link IHDF5SimpleReader}:
*
* <pre>
* IHDF5Reader reader = HDF5FactoryProvider.get().openForReading(new File("test.h5"));
* float[] f = reader.readFloatArray("/some/path/dataset");
* String s = reader.getStringAttribute("/some/path/dataset", "some key");
* reader.close();
* </pre>
*
* @author Bernd Rinn
*/
public interface IHDF5Reader extends IHDF5SimpleReader
{
// /////////////////////
// File
// /////////////////////
/**
* Returns the handler for file-level information and status.
*/
public IHDF5FileLevelReadOnlyHandler file();
// /////////////////////////////////
// Objects, links, groups and types
// /////////////////////////////////
/**
* Returns an info provider for HDF5 objects like links, groups, data sets and data types.
*/
public IHDF5ObjectReadOnlyInfoProviderHandler object();
// /////////////////////
// Opaque
// /////////////////////
/**
* Returns the full reader for reading data sets and attributes as byte arrays ('opaque') and
* obtaining opaque types.
*/
public IHDF5OpaqueReader opaque();
// /////////////////////
// Boolean
// /////////////////////
/**
* Returns the full reader for boolean values.
*/
public IHDF5BooleanReader bool();
// /////////////////////
// Bytes
// /////////////////////
/**
* Returns the full reader for byte / int8.
*/
public IHDF5ByteReader int8();
/**
* Returns the full reader for unsigned byte / uint8.
*/
public IHDF5ByteReader uint8();
// /////////////////////
// Short
// /////////////////////
/**
* Returns the full reader for short / int16.
*/
public IHDF5ShortReader int16();
/**
* Returns the full reader for unsigned short / uint16.
*/
public IHDF5ShortReader uint16();
// /////////////////////
// Int
// /////////////////////
/**
* Returns the full reader for int / int32.
*/
public IHDF5IntReader int32();
/**
* Returns the full reader for unsigned int / uint32.
*/
public IHDF5IntReader uint32();
// /////////////////////
// Long
// /////////////////////
/**
* Returns the full reader for long / int64.
*/
public IHDF5LongReader int64();
/**
* Returns the full reader for unsigned long / uint64.
*/
public IHDF5LongReader uint64();
// /////////////////////
// Float
// /////////////////////
/**
* Returns the full reader for float / float32.
*/
public IHDF5FloatReader float32();
// /////////////////////
// Double
// /////////////////////
/**
* Returns the full reader for long / float64.
*/
public IHDF5DoubleReader float64();
// /////////////////////
// Enums
// /////////////////////
/**
* Returns the full reader for enumerations.
*/
public IHDF5EnumReader enumeration();
// /////////////////////
// Compounds
// /////////////////////
/**
* Returns the full reader for compounds.
*/
public IHDF5CompoundReader compound();
// /////////////////////
// Strings
// /////////////////////
/**
* Returns the full reader for strings.
*/
public IHDF5StringReader string();
// /////////////////////
// Date & Time
// /////////////////////
/**
* Returns the full reader for date and times.
*/
public IHDF5DateTimeReader time();
/**
* Returns the full reader for time durations.
*/
public IHDF5TimeDurationReader duration();
// /////////////////////
// Object references
// /////////////////////
/**
* Returns the full reader for object references.
*/
public IHDF5ReferenceReader reference();
}
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