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java.lang.Objectorg.apache.accumulo.core.security.ColumnVisibility
public class ColumnVisibility
Validate the column visibility is a valid expression and set the visibility for a Mutation. See ColumnVisibility(byte[])
for the
definition of an expression.
Nested Class Summary | |
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static class |
ColumnVisibility.Node
|
static class |
ColumnVisibility.NodeComparator
|
static class |
ColumnVisibility.NodeType
|
Constructor Summary | |
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ColumnVisibility()
Empty visibility. |
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ColumnVisibility(byte[] expression)
A convenience method for constructing from a string already encoded in UTF-8 bytes. |
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ColumnVisibility(String expression)
Set the column visibility for a Mutation. |
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ColumnVisibility(org.apache.hadoop.io.Text expression)
A convenience method for constructing from a string already encoded in UTF-8 bytes and contained in a Text object. |
Method Summary | |
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boolean |
equals(ColumnVisibility otherLe)
Compares two ColumnVisibilities for string equivalence, not as a meaningful comparison of terms and conditions. |
boolean |
equals(Object obj)
See equals(ColumnVisibility) |
byte[] |
flatten()
Generates a byte[] that represents a normalized, but logically equivalent, form of the supplied expression. |
byte[] |
getExpression()
Accessor for the underlying byte string. |
ColumnVisibility.Node |
getParseTree()
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int |
hashCode()
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static byte[] |
quote(byte[] term)
A convenience method to quote terms which are already encoded as UTF-8 bytes. |
static String |
quote(String term)
Use to properly quote terms in a column visibility expression. |
String |
toString()
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Methods inherited from class java.lang.Object |
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clone, finalize, getClass, notify, notifyAll, wait, wait, wait |
Constructor Detail |
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public ColumnVisibility()
ColumnVisibility(String)
public ColumnVisibility(String expression)
expression
- An expression of the rights needed to see this mutation. The expression is a sequence of characters from the set [A-Za-z0-9_-] along with the
binary operators "&" and "|" indicating that both operands are necessary, or the either is necessary. The following are valid expressions for
visibility:
A A|B (A|B)&(C|D) orange|(red&yellow)
The following are not valid expressions for visibility:
A|B&C A=B A|B| A&|B () ) dog|!cat
You can use any character you like in your column visibility expression with quoting. If your quoted term contains '"' or '\' then escape
them with '\'. The quote(String)
method will properly quote and escape terms for you.
"A#C"&B
public ColumnVisibility(org.apache.hadoop.io.Text expression)
Text
object.
ColumnVisibility(String)
public ColumnVisibility(byte[] expression)
ColumnVisibility(String)
Method Detail |
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public byte[] getExpression()
public byte[] flatten()
public String toString()
toString
in class Object
public boolean equals(Object obj)
equals(ColumnVisibility)
equals
in class Object
public boolean equals(ColumnVisibility otherLe)
public int hashCode()
hashCode
in class Object
public ColumnVisibility.Node getParseTree()
public static String quote(String term)
Examples of using quote :
import static org.apache.accumulo.core.security.ColumnVisibility.quote; . . . ColumnVisibility cv = new ColumnVisibility(quote("A#C") + "&" + quote("FOO"));
public static byte[] quote(byte[] term)
quote(String)
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