org.z3950.zing.cql
Class CQLBooleanNode
java.lang.Object
|
+--org.z3950.zing.cql.CQLNode
|
+--org.z3950.zing.cql.CQLBooleanNode
- Direct Known Subclasses:
- CQLAndNode, CQLNotNode, CQLOrNode, CQLProxNode
- public abstract class CQLBooleanNode
- extends CQLNode
Represents a boolean node in a CQL parse-tree.
- Version:
- $Id: CQLBooleanNode.java,v 1.13 2002/12/11 17:14:20 mike Exp $
Field Summary |
CQLNode |
left
The root of a parse-tree representing the left-hand side. |
CQLNode |
right
The root of a parse-tree representing the right-hand side. |
Fields inherited from class org.z3950.zing.cql.CQLNode |
APPLICATION, BITSTRING, BOOLEAN, CONSTRUCTED, CONTEXT, ENUMERATED, EXTERNAL, GENERALSTRING, INTEGER, NULL, OBJECTDESCRIPTOR, OBJECTIDENTIFIER, OCTETSTRING, PRIMITIVE, PRIVATE, SEQUENCE, SET, UNIVERSAL, VISIBLESTRING |
Method Summary |
java.lang.String |
toCQL()
Decompiles a parse-tree into a CQL query. |
java.lang.String |
toPQF(java.util.Properties config)
Renders a parse-tree into a Yaz-style PQF string. |
byte[] |
toType1BER(java.util.Properties config)
Renders a parser-tree into a BER-endoded packet representing an
equivalent Z39.50 Type-1 query. |
java.lang.String |
toXCQL(int level,
java.util.Vector prefixes)
|
Methods inherited from class org.z3950.zing.cql.CQLNode |
getResultSetName, indent, lenLen, makeOID, makeQuery, numLen, putLen, putNum, putTag, renderPrefixes, toXCQL, xq |
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
left
public CQLNode left
- The root of a parse-tree representing the left-hand side.
right
public CQLNode right
- The root of a parse-tree representing the right-hand side.
toXCQL
public java.lang.String toXCQL(int level,
java.util.Vector prefixes)
- Overrides:
toXCQL
in class CQLNode
toCQL
public java.lang.String toCQL()
- Description copied from class:
CQLNode
- Decompiles a parse-tree into a CQL query.
- Overrides:
toCQL
in class CQLNode
- Following copied from class:
org.z3950.zing.cql.CQLNode
- Returns:
- A String containing a CQL query equivalent to the parse-tree
whose root is this node, so that compiling that query will
yield an identical tree.
toPQF
public java.lang.String toPQF(java.util.Properties config)
throws PQFTranslationException
- Description copied from class:
CQLNode
- Renders a parse-tree into a Yaz-style PQF string.
PQF, or Prefix Query Format, is a cryptic but powerful notation
that can be trivially mapped, one-to-one, int Z39.50 Type-1 and
Type-101 queries. A specification for the format can be found
in
Chapter 7 (Supporting Tools) of the
YAZ manual.
- Overrides:
toPQF
in class CQLNode
- Following copied from class:
org.z3950.zing.cql.CQLNode
- Parameters:
config
- A Properties object containing configuration
information that specifies the mapping from CQL qualifiers,
relations, etc. to Type-1 attributes. The mapping
specification is described in the CQL-Java distribution's
sample PQF-mapping configuration file,
etc/pqf.properties, which see.- Returns:
- A String containing a PQF query equivalent to the parse-tree
whose root is this node.
toType1BER
public byte[] toType1BER(java.util.Properties config)
throws PQFTranslationException
- Description copied from class:
CQLNode
- Renders a parser-tree into a BER-endoded packet representing an
equivalent Z39.50 Type-1 query. If you don't know what that
means, then you don't need this method :-) This is useful
primarily for SRW-to-Z39.50 gateways.
- Overrides:
toType1BER
in class CQLNode
- Following copied from class:
org.z3950.zing.cql.CQLNode
- Parameters:
config
- A Properties object containing configuration
information that specifies the mapping from CQL qualifiers,
relations, etc. to Type-1 attributes. The mapping
specification is described in the CQL-Java distribution's
sample PQF-mapping configuration file,
etc/pqf.properties, which see.- Returns:
- A byte array containing the BER packet.
- See Also:
- ftp://ftp.rsasecurity.com/pub/pkcs/ascii/layman.asc