gsfc.nssdc.cdf

Class Entry

java.lang.Object

gsfc.nssdc.cdf.Entry

All Implemented Interfaces:

CDFConstants, CDFObject

public class Entry
extends java.lang.Object
implements CDFObject, CDFConstants

This class describes a CDF global or variable attribute entry.

Note: In the Java CDF API there is no concept of an rEntry since r variables are not supported. Only z variables are supported since it is far superior and efficient than r variables.

Version:

1.0, 2.0 03/18/05 Selection of current CDF, attribute and entry are done as part of operations passed to JNI. JNI call is synchronized so only one process is allowed in a JVM, due to multi-thread safety. The select method will never be called.

See Also:

Attribute

Field Summary

Fields inherited from interface gsfc.nssdc.cdf.CDFConstants

AHUFF_COMPRESSION, ALPHAOSF1_DECODING, ALPHAOSF1_ENCODING, ALPHAVMSd_DECODING, ALPHAVMSd_ENCODING, ALPHAVMSg_DECODING, ALPHAVMSg_ENCODING, ALPHAVMSi_DECODING, ALPHAVMSi_ENCODING, ARM_BIG_DECODING, ARM_BIG_ENCODING, ARM_LITTLE_DECODING, ARM_LITTLE_ENCODING, ATTR_, ATTR_EXISTENCE_, ATTR_EXISTS, ATTR_MAXgENTRY_, ATTR_MAXrENTRY_, ATTR_MAXzENTRY_, ATTR_NAME_, ATTR_NAME_TRUNC, ATTR_NUMBER_, ATTR_NUMgENTRIES_, ATTR_NUMrENTRIES_, ATTR_NUMzENTRIES_, ATTR_SCOPE_, BACKWARD_, BACKWARDFILEoff, BACKWARDFILEon, BAD_ALLOCATE_RECS, BAD_ARGUMENT, BAD_ATTR_NAME, BAD_ATTR_NUM, BAD_BLOCKING_FACTOR, BAD_CACHE_SIZE, BAD_CDF_EXTENSION, BAD_CDF_ID, BAD_CDF_NAME, BAD_CDFSTATUS, BAD_CHECKSUM, BAD_COMPRESSION_PARM, BAD_DATA_TYPE, BAD_DECODING, BAD_DIM_COUNT, BAD_DIM_INDEX, BAD_DIM_INTERVAL, BAD_DIM_SIZE, BAD_ENCODING, BAD_ENTRY_NUM, BAD_FNC_OR_ITEM, BAD_FORMAT, BAD_INITIAL_RECS, BAD_MAJORITY, BAD_MALLOC, BAD_NEGtoPOSfp0_MODE, BAD_NUM_DIMS, BAD_NUM_ELEMS, BAD_NUM_STRINGS, BAD_NUM_VARS, BAD_READONLY_MODE, BAD_REC_COUNT, BAD_REC_INTERVAL, BAD_REC_NUM, BAD_SCOPE, BAD_SCRATCH_DIR, BAD_SPARSEARRAYS_PARM, BAD_VAR_NAME, BAD_VAR_NUM, BAD_zMODE, BADDATE_LEAPSECOND_UPDATED, BeginUnixTimeEPOCH, BeginUnixTimeEPOCH16, BLOCKINGFACTOR_TOO_LARGE, BLOCKINGFACTOR_TOO_SMALL, BLOCKINGFACTOR_TOO_SMALL2, CANNOT_ALLOCATE_RECORDS, CANNOT_CHANGE, CANNOT_COMPRESS, CANNOT_CONVERT_WIDECHAR, CANNOT_COPY, CANNOT_INSERT_RECORDS, CANNOT_SPARSEARRAYS, CANNOT_SPARSERECORDS, CDF_, CDF_ACCESS_, CDF_ATTR_NAME_LEN, CDF_ATTR_NAME_LEN256, CDF_BYTE, CDF_CACHESIZE_, CDF_CHAR, CDF_CHECKSUM_, CDF_CLOSE_ERROR, CDF_COMPRESSION_, CDF_COPYRIGHT_, CDF_COPYRIGHT_LEN, CDF_CREATE_ERROR, CDF_DECODING_, CDF_DELETE_ERROR, CDF_DOUBLE, CDF_ENCODING_, CDF_EPOCH, CDF_EPOCH16, CDF_EXISTS, CDF_FLOAT, CDF_FORMAT_, CDF_INCREMENT_, CDF_INFO_, CDF_INT1, CDF_INT2, CDF_INT4, CDF_INT8, CDF_INTERNAL_ERROR, CDF_LEAPSECONDLASTUPDATED_, CDF_MAJORITY_, CDF_MAX_DIMS, CDF_MAX_PARMS, CDF_MIN_DIMS, CDF_NAME_, CDF_NAME_TRUNC, CDF_NEGtoPOSfp0_MODE_, CDF_NUMATTRS_, CDF_NUMgATTRS_, CDF_NUMrVARS_, CDF_NUMvATTRS_, CDF_NUMzVARS_, CDF_OK, CDF_OPEN_ERROR, CDF_PATHNAME_LEN, CDF_READ_ERROR, CDF_READONLY_MODE_, CDF_REAL4, CDF_REAL8, CDF_RELEASE_, CDF_SAVE_ERROR, CDF_SCRATCHDIR_, CDF_STATUS_, CDF_STATUSTEXT_LEN, CDF_TIME_TT2000, CDF_UCHAR, CDF_UINT1, CDF_UINT2, CDF_UINT4, CDF_VAR_NAME_LEN, CDF_VAR_NAME_LEN256, CDF_VERSION_, CDF_WARN, CDF_WRITE_ERROR, CDF_zMODE_, CDFwithSTATS_, CHECKSUM_, CHECKSUM_ERROR, CHECKSUM_NOT_ALLOWED, CLOSE_, COLUMN_MAJOR, COMPRESS_CACHESIZE_, COMPRESSION_ERROR, CONFIRM_, CORRUPTED_V2_CDF, CORRUPTED_V3_CDF, CREATE_, CURgENTRY_EXISTENCE_, CURrENTRY_EXISTENCE_, CURzENTRY_EXISTENCE_, DATATYPE_MISMATCH, DATATYPE_SIZE_, DECOMPRESSION_ERROR, DECSTATION_DECODING, DECSTATION_ENCODING, DEFAULT_BYTE_PADVALUE, DEFAULT_CHAR_PADVALUE, DEFAULT_DOUBLE_PADVALUE, DEFAULT_EPOCH_PADVALUE, DEFAULT_EPOCH16_PADVALUE, DEFAULT_FLOAT_PADVALUE, DEFAULT_INT1_PADVALUE, DEFAULT_INT2_PADVALUE, DEFAULT_INT4_PADVALUE, DEFAULT_INT8_PADVALUE, DEFAULT_REAL4_PADVALUE, DEFAULT_REAL8_PADVALUE, DEFAULT_TT2000_PADVALUE, DEFAULT_UCHAR_PADVALUE, DEFAULT_UINT1_PADVALUE, DEFAULT_UINT2_PADVALUE, DEFAULT_UINT4_PADVALUE, DELETE_, DID_NOT_COMPRESS, EMPTY_COMPRESSED_CDF, END_OF_VAR, EPOCH_STRING_LEN, EPOCH_STRING_LEN_EXTEND, EPOCH1_STRING_LEN, EPOCH1_STRING_LEN_EXTEND, EPOCH2_STRING_LEN, EPOCH2_STRING_LEN_EXTEND, EPOCH3_STRING_LEN, EPOCH3_STRING_LEN_EXTEND, EPOCH4_STRING_LEN, EPOCH4_STRING_LEN_EXTEND, EPOCHx_FORMAT_MAX, EPOCHx_STRING_MAX, FILLED_TT2000_VALUE, FORCED_PARAMETER, FUNCTION_NOT_SUPPORTED, gENTRY_, gENTRY_DATA_, gENTRY_DATASPEC_, gENTRY_DATATYPE_, gENTRY_EXISTENCE_, gENTRY_NUMELEMS_, GET_, GETCDFCHECKSUM_, GETCDFFILEBACKWARD_, GETCDFVALIDATE_, GETLEAPSECONDSENVVAR_, GLOBAL_SCOPE, GZIP_COMPRESSION, HOST_DECODING, HOST_ENCODING, HP_DECODING, HP_ENCODING, HUFF_COMPRESSION, IA64VMSd_DECODING, IA64VMSd_ENCODING, IA64VMSg_DECODING, IA64VMSg_ENCODING, IA64VMSi_DECODING, IA64VMSi_ENCODING, IBM_PC_OVERFLOW, IBMPC_DECODING, IBMPC_ENCODING, IBMRS_DECODING, IBMRS_ENCODING, ILLEGAL_EPOCH_FIELD, ILLEGAL_EPOCH_VALUE, ILLEGAL_FOR_SCOPE, ILLEGAL_IN_zMODE, ILLEGAL_ON_V1_CDF, ILLEGAL_TT2000_VALUE, IS_A_NETCDF, LIB_COPYRIGHT_, LIB_INCREMENT_, LIB_RELEASE_, LIB_subINCREMENT_, LIB_VERSION_, MAC_DECODING, MAC_ENCODING, MD5_CHECKSUM, MULTI_FILE, MULTI_FILE_FORMAT, NA_FOR_VARIABLE, NEGATIVE_FP_ZERO, NEGtoPOSfp0off, NEGtoPOSfp0on, NETWORK_DECODING, NETWORK_ENCODING, NeXT_DECODING, NeXT_ENCODING, NO_ATTR_SELECTED, NO_CDF_SELECTED, NO_CHECKSUM, NO_COMPRESSION, NO_DELETE_ACCESS, NO_ENTRY_SELECTED, NO_MORE_ACCESS, NO_PADVALUE_SPECIFIED, NO_SPARSEARRAYS, NO_SPARSERECORDS, NO_STATUS_SELECTED, NO_SUCH_ATTR, NO_SUCH_CDF, NO_SUCH_ENTRY, NO_SUCH_RECORD, NO_SUCH_VAR, NO_VAR_SELECTED, NO_VARS_IN_CDF, NO_WRITE_ACCESS, NONE_CHECKSUM, NOT_A_CDF, NOT_A_CDF_OR_NOT_SUPPORTED, NOVARY, NULL_, OPEN_, OPTIMAL_ENCODING_TREES, OTHER_CHECKSUM, PAD_SPARSERECORDS, PPC_DECODING, PPC_ENCODING, PRECEEDING_RECORDS_ALLOCATED, PREV_SPARSERECORDS, PUT_, READ_ONLY_DISTRIBUTION, READ_ONLY_MODE, READONLYoff, READONLYon, rENTRY_, rENTRY_DATA_, rENTRY_DATASPEC_, rENTRY_DATATYPE_, rENTRY_EXISTENCE_, rENTRY_NAME_, rENTRY_NUMELEMS_, rENTRY_NUMSTRINGS_, rENTRY_STRINGSDATA_, RLE_COMPRESSION, RLE_OF_ZEROs, ROW_MAJOR, rVAR_, rVAR_ALLOCATEBLOCK_, rVAR_ALLOCATEDFROM_, rVAR_ALLOCATEDTO_, rVAR_ALLOCATERECS_, rVAR_BLOCKINGFACTOR_, rVAR_CACHESIZE_, rVAR_COMPRESSION_, rVAR_DATA_, rVAR_DATASPEC_, rVAR_DATATYPE_, rVAR_DIMVARYS_, rVAR_EXISTENCE_, rVAR_HYPERDATA_, rVAR_INITIALRECS_, rVAR_MAXallocREC_, rVAR_MAXREC_, rVAR_NAME_, rVAR_nINDEXENTRIES_, rVAR_nINDEXLEVELS_, rVAR_nINDEXRECORDS_, rVAR_NUMallocRECS_, rVAR_NUMBER_, rVAR_NUMELEMS_, rVAR_NUMRECS_, rVAR_PADVALUE_, rVAR_RECORDS_, rVAR_RECORDS_RENUMBER_, rVAR_RECVARY_, rVAR_RESERVEPERCENT_, rVAR_SEQDATA_, rVAR_SEQPOS_, rVAR_SPARSEARRAYS_, rVAR_SPARSERECORDS_, rVARs_CACHESIZE_, rVARs_DIMCOUNTS_, rVARs_DIMINDICES_, rVARs_DIMINTERVALS_, rVARs_DIMSIZES_, rVARs_MAXREC_, rVARs_NUMDIMS_, rVARs_RECCOUNT_, rVARs_RECDATA_, rVARs_RECINTERVAL_, rVARs_RECNUMBER_, SAVE_, SCRATCH_CREATE_ERROR, SCRATCH_DELETE_ERROR, SCRATCH_READ_ERROR, SCRATCH_WRITE_ERROR, SELECT_, SGi_DECODING, SGi_ENCODING, SINGLE_FILE, SINGLE_FILE_FORMAT, SOME_ALREADY_ALLOCATED, STAGE_CACHESIZE_, STATUS_TEXT_, STRING_NOT_UTF8_ENCODING, STRINGDELIMITER, SUN_DECODING, SUN_ENCODING, TOO_MANY_PARMS, TOO_MANY_VARS, TRY_TO_READ_NONSTRING_DATA, TT2000_0_STRING_LEN, TT2000_1_STRING_LEN, TT2000_2_STRING_LEN, TT2000_3_STRING_LEN, TT2000_4_STRING_LEN, TT2000_CDF_MAYNEEDUPDATE, TT2000_TIME_ERROR, TT2000_USED_OUTDATED_TABLE, UNABLE_TO_PROCESS_CDF, UNKNOWN_COMPRESSION, UNKNOWN_SPARSENESS, UNSUPPORTED_OPERATION, VALIDATE_, VALIDATEFILEoff, VALIDATEFILEon, VAR_ALREADY_CLOSED, VAR_CLOSE_ERROR, VAR_CREATE_ERROR, VAR_DELETE_ERROR, VAR_EXISTS, VAR_NAME_TRUNC, VAR_OPEN_ERROR, VAR_READ_ERROR, VAR_SAVE_ERROR, VAR_WRITE_ERROR, VARIABLE_SCOPE, VARY, VAX_DECODING, VAX_ENCODING, VIRTUAL_RECORD_DATA, zENTRY_, zENTRY_DATA_, zENTRY_DATASPEC_, zENTRY_DATATYPE_, zENTRY_EXISTENCE_, zENTRY_NAME_, zENTRY_NUMELEMS_, zENTRY_NUMSTRINGS_, zENTRY_STRINGSDATA_, ZLIB_COMPRESS_ERROR, ZLIB_UNCOMPRESS_ERROR, zMODEoff, zMODEon1, zMODEon2, zVAR_, zVAR_ALLOCATEBLOCK_, zVAR_ALLOCATEDFROM_, zVAR_ALLOCATEDTO_, zVAR_ALLOCATERECS_, zVAR_BLOCKINGFACTOR_, zVAR_CACHESIZE_, zVAR_COMPRESSION_, zVAR_DATA_, zVAR_DATASPEC_, zVAR_DATATYPE_, zVAR_DIMCOUNTS_, zVAR_DIMINDICES_, zVAR_DIMINTERVALS_, zVAR_DIMSIZES_, zVAR_DIMVARYS_, zVAR_EXISTENCE_, zVAR_HYPERDATA_, zVAR_INITIALRECS_, zVAR_MAXallocREC_, zVAR_MAXREC_, zVAR_NAME_, zVAR_nINDEXENTRIES_, zVAR_nINDEXLEVELS_, zVAR_nINDEXRECORDS_, zVAR_NUMallocRECS_, zVAR_NUMBER_, zVAR_NUMDIMS_, zVAR_NUMELEMS_, zVAR_NUMRECS_, zVAR_PADVALUE_, zVAR_RECCOUNT_, zVAR_RECINTERVAL_, zVAR_RECNUMBER_, zVAR_RECORDS_, zVAR_RECORDS_RENUMBER_, zVAR_RECVARY_, zVAR_RESERVEPERCENT_, zVAR_SEQDATA_, zVAR_SEQPOS_, zVAR_SPARSEARRAYS_, zVAR_SPARSERECORDS_, zVARs_CACHESIZE_, zVARs_MAXREC_, zVARs_RECDATA_, zVARs_RECNUMBER_

Method Summary

Methods

Modifier and Type	Method and Description
static Entry	create(Attribute myAttribute, long id, long dataType, java.lang.Object data) Creates a new global or variable attribute entry.
void	delete() Deletes this entry.
java.lang.Object	getData() Gets the data for this entry.
long	getDataType() Gets the CDF data type of this entry.
long	getID() Gets the ID of this entry.
java.lang.String	getName() Gets the name of this entry.
long	getNumElements() Gets the number of elements in this entry.
long	getNumStrings() Gets the number of strings in the data.
long	getScope() Gets the scope of the attribute this entry in in.
void	putData(long dataType, java.lang.Object data) Put the entry data into the CDF.
void	rename(java.lang.String name) This method is here as a placeholder since the Entry class implements the CDFObject interface that includes "rename".
void	updateDataSpec(long dataType, long numElements) Update the data specification (data type and number of elements) of the entry.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

create

public static Entry create(Attribute myAttribute,
           long id,
           long dataType,
           java.lang.Object data)
                    throws CDFException

Creates a new global or variable attribute entry. One can create as many global and variable entries as needed. The following example creates four entries for the global attribute "Project":

     Attribute project  = Attribute.create(cdf, "Project", GLOBAL_SCOPE);
     Entry.create(project, 0, CDF_CHAR, "Project name: IMAGE");
     Entry.create(project, 1, CDF_CHAR, "Description 1");
     Entry.create(project, 2, CDF_CHAR, "Description 2");
 

The following example creates a variable attribute entry for the variable "Longitude" associated with the attribute "VALIDMIN":

     Variable longitude = cdf.getVariable("Longitude"); 
     Attribute validMin = Attribute.create(cdf, "VALIDMIN", 
                                           VARIABLE_SCOPE);
     Entry.create(validMin, longitude.getID(), CDF_INT2, 
                  new Short((short)10)); 
             OR 
     longitude.putEntry(validMin, CDF_INT2, new Short((short)180));
 

Parameters:

myAttribute - the attribute to which this entry belongs

id - the entry id

dataType - the CDF data type for this entry that should be one of the following:

• CDF_BYTE - 1-byte, signed integer
• CDF_CHAR - 1-byte, signed character
• CDF_INT1 - 1-byte, signed integer
• CDF_UCHAR - 1-byte, unsigned character
• CDF_UINT1 - 1-byte, unsigned integer
• CDF_INT2 - 2-byte, signed integer
• CDF_UNIT2 - 2-byte, unsigned integer
• CDF_INT4 - 4-byte, signed integer
• CDF_UINT4 - 4-byte, unsigned integer
• CDF_INT8 - 8-byte, signed integer
• CDF_REAL4 - 4-byte, floating point
• CDF_FLOAT - 4-byte, floating point
• CDF_REAL8 - 8-byte, floating point
• CDF_DOUBLE - 8-byte, floating point
• CDF_EPOCH - 8-byte, floating point
• CDF_EPOCH16 - 2*8-byte, floating point
• CDF_TIME_TT2000 - 8-byte, signed integer

data - the entry data to be added

Note: From CDF V3.7.0, the string typed data of variable entry can be an array of strings. Data from previous versions can only be a single string.

Returns:

newly created attribute entry

Throws:

CDFException - CDFException if there is a problem creating an entry

delete

public void delete()
            throws CDFException

Deletes this entry.

Specified by:

delete in interface CDFObject

Throws:

CDFException - CDFException if there is a problem deleting this entry

getDataType

public long getDataType()

Gets the CDF data type of this entry. See the description of the create method for the CDF data types supported by the CDF library.

Returns:

the CDF data type of this entry

getScope

public long getScope()

Gets the scope of the attribute this entry in in.

Returns:

the scope of this entry

getNumElements

public long getNumElements()

Gets the number of elements in this entry. For CDF_CHAR, it returns the number of characters stored.

     Entry data        Number of elements
     ----------        ------------------
     10                1
     20.8              1
     10 20 30          3
     20.8 20.9         2
     "Upper Limits"    12
 

Returns:

the number of elements stored in this entry

getNumStrings

public long getNumStrings()

Gets the number of strings in the data. If the data is not string type, 0 is returned. For global attribute entry, it always returns 1.

Returns:

the string number for this entry

getData

public java.lang.Object getData()
                         throws CDFException

Gets the data for this entry. Build a new data object so a duplicated variable will have its own copy of the entry data.

Returns:

the data for this entry Note: From CDF V3.7.0, the string typed data of variable entry can return an array of strings. Data from previous versions only returns a single string.

Throws:

CDFException - An exception is thrown if the operation fails

getID

public long getID()

Gets the ID of this entry.

Returns:

the ID/number of this entry

getName

public java.lang.String getName()

Gets the name of this entry. Since an entry doesn't have its own name, the string representation of this entry ID is returned.

This method overrides the getName() method defined in the Java Object class. If this method is called explicitly or implicitly (i.e. just the entry name by itself), it returns the string representation of the entry ID.

Specified by:

getName in interface CDFObject

Returns:

string representation of this attribute entry ID

rename

public void rename(java.lang.String name)
            throws CDFException

This method is here as a placeholder since the Entry class implements the CDFObject interface that includes "rename".

Specified by:

rename in interface CDFObject

Parameters:

name - - not applicable

Throws:

CDFException - CDFException - not applicable

updateDataSpec

public void updateDataSpec(long dataType,
                  long numElements)
                    throws CDFException

Update the data specification (data type and number of elements) of the entry.

Parameters:

dataType - the data type of the entry data

numElements - the number of elements of the entry data

Throws:

CDFException - An exception is thrown if the operation fails

putData

public void putData(long dataType,
           java.lang.Object data)
             throws CDFException

Put the entry data into the CDF.

Parameters:

dataType - the data type of the entry data

data - the entry data to write Note: From CDF V3.7.0, the string typed data of variable entry can be an array of strings. Data from previous versions can only be a single string.

Throws:

CDFException - An exception is thrown if the operation fails