Package ucar.nc2

Class Group

  • All Implemented Interfaces:
    Iterable<Attribute>, AttributeContainer
    public class Group
extends CDMNode
implements AttributeContainer
    A logical collection of Variables, Attributes, and Dimensions. The Groups in a Dataset form a hierarchical tree, like directories on a disk. A Group has a name and optionally a set of Attributes. There is always at least one Group in a dataset, the root Group, whose name is the empty string. Immutable if setImmutable() was called. TODO Group will be immutable in 6. TODO Group will not implement AttributeContainer in 6, use Group.attributes(). TODO Group will not extend CDMNode in 6.

    • Constructor Detail

      • Group

        @Deprecated
public Group​(NetcdfFile ncfile,
             Group parent,
             String shortName)
        Deprecated.
        Use Group.builder()
        Constructor
        Parameters:
        ncfile - NetcdfFile owns this Group
        parent - parent of Group. If null, this is the root Group.
        shortName - short name of Group.

    • Method Detail

      • isRoot

        public boolean isRoot()
        Is this the root group?
        Returns:
        true if root group

      • getVariables

        public List<Variable> getVariables()
        Get the Variables contained directly in this group.
        Returns:
        List of type Variable; may be empty, not null. TODO return ImmutableList

      • findVariable

        @Deprecated
@Nullable
public Variable findVariable​(String varShortName)
        Deprecated.
        use findVariableLocal()

      • findVariableLocal

        @Nullable
public Variable findVariableLocal​(String varShortName)
        Find the Variable with the specified (short) name in this group.
        Parameters:
        varShortName - short name of Variable within this group.
        Returns:
        the Variable, or null if not found

      • findVariableOrInParent

        @Nullable
public Variable findVariableOrInParent​(String varShortName)
        Find the Variable with the specified (short) name in this group or a parent group.
        Parameters:
        varShortName - short name of Variable.
        Returns:
        the Variable, or null if not found

      • findVariableByAttribute

        @Nullable
public Variable findVariableByAttribute​(String attName,
                                        String attValue)
        Look in this Group and in its nested Groups for a Variable with a String valued Attribute with the given name and value.
        Parameters:
        attName - look for an Attribuite with this name.
        attValue - look for an Attribuite with this value.
        Returns:
        the first Variable that matches, or null if none match.

      • getParentGroup

        @Nullable
public Group getParentGroup()
        Get the parent Group, or null if its the root group. Not deprecated.
        Overrides:
        getParentGroup in class CDMNode
        Returns:
        parent Group

      • getFullName

        public String getFullName()
        Get the full name of this object. Certain characters are backslash escaped (see NetcdfFiles.getFullName(Group)) Not deprecated.
        Overrides:
        getFullName in class CDMNode
        Returns:
        full name with backslash escapes

      • getGroups

        public com.google.common.collect.ImmutableList<Group> getGroups()
        Get the Groups contained directly in this Group.
        Returns:
        List of type Group; may be empty, not null.

      • getNetcdfFile

        public NetcdfFile getNetcdfFile()
        Get the owning NetcdfFile

      • findGroupLocal

        @Nullable
public Group findGroupLocal​(String groupShortName)
        Retrieve the Group with the specified (short) name.
        Parameters:
        groupShortName - short name of the nested group you are looking for.
        Returns:
        the Group, or null if not found

      • getDimensions

        public List<Dimension> getDimensions()
        Get the shared Dimensions contained directly in this group.
        Returns:
        List of type Dimension; may be empty, not null. TODO return ImmutableList

      • makeDimensionsList

        public com.google.common.collect.ImmutableList<Dimension> makeDimensionsList​(String dimString)
                                                                      throws IllegalArgumentException
        Create a dimension list using dimension names. The dimension is searched for recursively in the parent groups.
        Parameters:
        dimString - : whitespace separated list of dimension names, or '*' for Dimension.UNKNOWN, or number for anon dimension. null or empty String is a scalar.
        Returns:
        list of dimensions, will return ImmutableList<> in version 6
        Throws:
        IllegalArgumentException - if cant find dimension or parse error.

      • getEnumTypedefs

        public com.google.common.collect.ImmutableList<EnumTypedef> getEnumTypedefs()
        Get the enumerations contained directly in this group.
        Returns:
        List of type EnumTypedef; may be empty, not null.

      • findDimension

        @Nullable
public Dimension findDimension​(String name)
        Find a Dimension in this or a parent Group, matching on short name.
        Parameters:
        name - Dimension name.
        Returns:
        the Dimension, or null if not found

      • findDimension

        @Nullable
public Dimension findDimension​(Dimension dim)
        Find a Dimension in this or a parent Group, using equals.
        Parameters:
        dim - Dimension .
        Returns:
        the Dimension, or null if not found

      • findDimensionLocal

        @Nullable
public Dimension findDimensionLocal​(String shortName)
        Find a Dimension using its (short) name, in this group only
        Parameters:
        shortName - Dimension name.
        Returns:
        the Dimension, or null if not found

      • attributes

        public AttributeContainer attributes()
        The attributes contained by this Group.

      • findAttributeString

        public String findAttributeString​(String attName,
                                  String defaultValue)
        Find a String-valued Attribute by name (ignore case), return the String value of the Attribute.
        Specified by:
        findAttributeString in interface AttributeContainer
        Returns:
        the attribute value, or defaultValue if not found

      • isEmpty

        public boolean isEmpty()
        Deprecated.
        Use attributes()
        Description copied from interface: AttributeContainer
        True is there are no attributes in the container.
        Specified by:
        isEmpty in interface AttributeContainer

      • findAttributeDouble

        @Deprecated
public double findAttributeDouble​(String attName,
                                  double defaultValue)
        Deprecated.
        Use attributes().findAttributeDouble()
        Description copied from interface: AttributeContainer
        Find a Numeric Attribute by name (ignore case), return the double value of the Attribute.
        Specified by:
        findAttributeDouble in interface AttributeContainer
        Returns:
        the attribute value, or defaultValue if not found

      • findAttributeInteger

        @Deprecated
public int findAttributeInteger​(String attName,
                                int defaultValue)
        Deprecated.
        Use attributes().findAttributeInteger()
        Description copied from interface: AttributeContainer
        Find a Numeric Attribute by name (ignore case), return the integer value of the Attribute.
        Specified by:
        findAttributeInteger in interface AttributeContainer
        Returns:
        the attribute value, or defaultValue if not found

      • remove

        @Deprecated
public boolean remove​(Attribute a)
        Deprecated.
        Use Group.builder()
        Description copied from interface: AttributeContainer
        Remove an Attribute : uses the attribute hashCode to find it.
        Specified by:
        remove in interface AttributeContainer
        Parameters:
        a - remove this attribute
        Returns:
        true if was found and removed

      • removeAttribute

        @Deprecated
public boolean removeAttribute​(String attName)
        Deprecated.
        Use Group.builder()
        Description copied from interface: AttributeContainer
        Remove an Attribute by name.
        Specified by:
        removeAttribute in interface AttributeContainer
        Parameters:
        attName - if exists, remove this attribute
        Returns:
        true if was found and removed

      • removeAttributeIgnoreCase

        @Deprecated
public boolean removeAttributeIgnoreCase​(String attName)
        Deprecated.
        Use Group.builder()
        Description copied from interface: AttributeContainer
        Remove an Attribute by name, ignoring case
        Specified by:
        removeAttributeIgnoreCase in interface AttributeContainer
        Parameters:
        attName - if exists, remove this attribute
        Returns:
        true if was found and removed

      • findEnumeration

        @Nullable
public EnumTypedef findEnumeration​(String name)
        Find a Enumeration in this or a parent Group, using its short name.

      • commonParent

        public Group commonParent​(Group other)
        Get the common parent of this and the other group. Cant fail, since the root group is always a parent of any 2 groups.
        Parameters:
        other - the other group
        Returns:
        common parent of this and the other group

      • isParent

        public boolean isParent​(Group other)
        Is this a parent of the other Group?
        Parameters:
        other - another Group
        Returns:
        true is it is equal or a parent

      • getNameAndAttributes

        public String getNameAndAttributes()
        Get String with name and attributes. Used in short descriptions like tooltips.
        Returns:
        name and attributes String.

      • writeCDL

        @Deprecated
public String writeCDL​(boolean strict)
        Deprecated.
        use CDLWriter
        CDL representation.
        Parameters:
        strict - if true, write in strict adherence to CDL definition.
        Returns:
        CDL representation.

      • setParentGroup

        @Deprecated
public void setParentGroup​(Group parent)
        Deprecated.
        Use Group.builder()
        Set the Group's parent Group
        Overrides:
        setParentGroup in class CDMNode
        Parameters:
        parent - parent group.

      • setName

        @Deprecated
public String setName​(String shortName)
        Deprecated.
        Use Group.builder()
        Set the short name, converting to valid CDM object name if needed.
        Parameters:
        shortName - set to this value
        Returns:
        valid CDM object name

      • addDimension

        @Deprecated
public void addDimension​(Dimension dim)
        Deprecated.
        Use Group.builder()
        Adds the specified shared dimension to this group.
        Parameters:
        dim - the dimension to add.
        Throws:
        IllegalStateException - if this dimension is immutable.
        IllegalArgumentException - if dim isn't shared or a dimension with dim's name already exists within the group.

      • addDimensionIfNotExists

        @Deprecated
public boolean addDimensionIfNotExists​(Dimension dim)
        Deprecated.
        Use Group.builder()
        Adds the specified shared dimension to this group, but only if another dimension with the same name doesn't already exist.
        Parameters:
        dim - the dimension to add.
        Returns:
        true if dim was successfully added to the group. Otherwise, false will be returned, meaning that a dimension with dim's name already exists within the group.
        Throws:
        IllegalStateException - if this dimension is immutable.
        IllegalArgumentException - if dim isn't shared.

      • addGroup

        @Deprecated
public void addGroup​(Group g)
        Deprecated.
        Use Group.builder()
        Add a nested Group
        Parameters:
        g - add this Group.

      • addEnumeration

        @Deprecated
public void addEnumeration​(EnumTypedef e)
        Deprecated.
        Use Group.builder()
        Add an Enumeration
        Parameters:
        e - add this Enumeration.

      • addVariable

        @Deprecated
public void addVariable​(Variable v)
        Deprecated.
        Use Group.builder()
        Add a Variable
        Parameters:
        v - add this Variable.

      • remove

        @Deprecated
public boolean remove​(Dimension d)
        Deprecated.
        Use Group.builder()
        Remove an Dimension : uses the dimension hashCode to find it.
        Parameters:
        d - remove this Dimension.
        Returns:
        true if was found and removed

      • remove

        @Deprecated
public boolean remove​(Group g)
        Deprecated.
        Use Group.builder()
        Remove an Attribute : uses the Group hashCode to find it.
        Parameters:
        g - remove this Group.
        Returns:
        true if was found and removed

      • remove

        @Deprecated
public boolean remove​(Variable v)
        Deprecated.
        Use Group.builder()
        Remove a Variable : uses the variable hashCode to find it.
        Parameters:
        v - remove this Variable.
        Returns:
        true if was found and removed

      • removeDimension

        @Deprecated
public boolean removeDimension​(String dimName)
        Deprecated.
        Use Group.builder()
        remove a Dimension using its name, in this group only
        Parameters:
        dimName - Dimension name.
        Returns:
        true if dimension found and removed

      • removeVariable

        @Deprecated
public boolean removeVariable​(String shortName)
        Deprecated.
        Use Group.builder()
        remove a Variable using its (short) name, in this group only
        Parameters:
        shortName - Variable name.
        Returns:
        true if Variable found and removed

      • equals

        public boolean equals​(Object oo)
        Instances which have same name and parent are equal.
        Overrides:
        equals in class Object

      • hashCode

        public int hashCode()
        Override Object.hashCode() to implement equals.
        Overrides:
        hashCode in class Object

      • makeRelativeGroup

        @Deprecated
public Group makeRelativeGroup​(NetcdfFile ncf,
                               String path,
                               boolean ignorelast)
        Deprecated.
        will move to dap2 in ver6
        Create groups to ensure path is defined
        Parameters:
        ncf - the containing netcdf file object
        path - the path to the desired group
        ignorelast - true => ignore last element in the path
        Returns:
        the Group, or null if not found

      • toBuilder

        public Group.Builder toBuilder()
        Turn into a mutable Builder. Can use toBuilder().build() to copy.