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public interface Compiler
The Compiler APIs are completely agnostic to the actual types of objects produced and consumed by the APIs. Arguments and return values are declared as java.lang.Object.
Since objects returned by Compiler methods are passed as arguments to other Compiler methods, the descriptions of these methods use virtual types. There are four virtual object types: EXPRESSION, QNAME, STEP and NODE_TEST.
The following example illustrates this notion. This sequence compiles the xpath "foo[round(1 div 2)]/text()":
Object qname1 = compiler.qname(null, "foo") Object expr1 = compiler.number("1"); Object expr2 = compiler.number("2"); Object expr3 = compiler.div(expr1, expr2); Object expr4 = compiler. coreFunction(Compiler.FUNCTION_ROUND, new Object[]{expr3}); Object test1 = compiler.nodeNameTest(qname1); Object step1 = compiler. step(Compiler.AXIS_CHILD, test1, new Object[]{expr4}); Object test2 = compiler.nodeTypeTest(Compiler.NODE_TYPE_TEXT); Object step2 = compiler.nodeTypeTest(Compiler.AXIS_CHILD, test2, null); Object expr5 = compiler.locationPath(false, new Object[]{step1, step2});
Method Summary | |
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Object |
and(Object[] arguments)
Produces an EXPRESSION object representing logical conjunction of all arguments |
Object |
divide(Object left,
Object right)
Produces an EXPRESSION object representing left divided by right |
Object |
equal(Object left,
Object right)
Produces an EXPRESSION object representing the comparison: left equals to right |
Object |
expressionPath(Object expression,
Object[] predicates,
Object[] steps)
Produces an EXPRESSION object representing a filter expression |
Object |
function(int code,
Object[] args)
Produces an EXPRESSION object representing the computation of a core function with the supplied arguments. |
Object |
function(Object name,
Object[] args)
Produces an EXPRESSION object representing the computation of a library function with the supplied arguments. |
Object |
greaterThan(Object left,
Object right)
Produces an EXPRESSION object representing the comparison: left greater than right |
Object |
greaterThanOrEqual(Object left,
Object right)
Produces an EXPRESSION object representing the comparison: left greater than or equal to right |
Object |
lessThan(Object left,
Object right)
Produces an EXPRESSION object representing the comparison: left less than right |
Object |
lessThanOrEqual(Object left,
Object right)
Produces an EXPRESSION object representing the comparison: left less than or equal to right |
Object |
literal(String value)
Produces an EXPRESSION object that represents a string constant. |
Object |
locationPath(boolean absolute,
Object[] steps)
Produces an EXPRESSION object representing a location path |
Object |
minus(Object argument)
Produces an EXPRESSION object representing unary negation of the argument |
Object |
minus(Object left,
Object right)
Produces an EXPRESSION object representing left minus right |
Object |
mod(Object left,
Object right)
Produces an EXPRESSION object representing left modulo right |
Object |
multiply(Object left,
Object right)
Produces an EXPRESSION object representing left multiplied by right |
Object |
nodeNameTest(Object qname)
Produces a NODE_TEST object that represents a node name test. |
Object |
nodeTypeTest(int nodeType)
Produces a NODE_TEST object that represents a node type test. |
Object |
notEqual(Object left,
Object right)
Produces an EXPRESSION object representing the comparison: left is not equal to right |
Object |
number(String value)
Produces an EXPRESSION object that represents a numeric constant. |
Object |
or(Object[] arguments)
Produces an EXPRESSION object representing logical disjunction of all arguments |
Object |
processingInstructionTest(String instruction)
Produces a NODE_TEST object that represents a processing instruction test. |
Object |
qname(String prefix,
String name)
Produces an QNAME that represents a name with an optional prefix. |
Object |
step(int axis,
Object nodeTest,
Object[] predicates)
Produces a STEP object that represents a node test. |
Object |
sum(Object[] arguments)
Produces an EXPRESSION object representing the sum of all argumens |
Object |
union(Object[] arguments)
Produces an EXPRESSION object representing union of all node sets |
Object |
variableReference(Object qname)
Produces an EXPRESSION object representing variable reference |
Field Detail |
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static final int NODE_TYPE_NODE
static final int NODE_TYPE_TEXT
static final int NODE_TYPE_COMMENT
static final int NODE_TYPE_PI
static final int AXIS_SELF
static final int AXIS_CHILD
static final int AXIS_PARENT
static final int AXIS_ANCESTOR
static final int AXIS_ATTRIBUTE
static final int AXIS_NAMESPACE
static final int AXIS_PRECEDING
static final int AXIS_FOLLOWING
static final int AXIS_DESCENDANT
static final int AXIS_ANCESTOR_OR_SELF
static final int AXIS_FOLLOWING_SIBLING
static final int AXIS_PRECEDING_SIBLING
static final int AXIS_DESCENDANT_OR_SELF
static final int FUNCTION_LAST
static final int FUNCTION_POSITION
static final int FUNCTION_COUNT
static final int FUNCTION_ID
static final int FUNCTION_LOCAL_NAME
static final int FUNCTION_NAMESPACE_URI
static final int FUNCTION_NAME
static final int FUNCTION_STRING
static final int FUNCTION_CONCAT
static final int FUNCTION_STARTS_WITH
static final int FUNCTION_CONTAINS
static final int FUNCTION_SUBSTRING_BEFORE
static final int FUNCTION_SUBSTRING_AFTER
static final int FUNCTION_SUBSTRING
static final int FUNCTION_STRING_LENGTH
static final int FUNCTION_NORMALIZE_SPACE
static final int FUNCTION_TRANSLATE
static final int FUNCTION_BOOLEAN
static final int FUNCTION_NOT
static final int FUNCTION_TRUE
static final int FUNCTION_FALSE
static final int FUNCTION_LANG
static final int FUNCTION_NUMBER
static final int FUNCTION_SUM
static final int FUNCTION_FLOOR
static final int FUNCTION_CEILING
static final int FUNCTION_ROUND
static final int FUNCTION_NULL
static final int FUNCTION_KEY
static final int FUNCTION_FORMAT_NUMBER
Method Detail |
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Object number(String value)
value
- numeric String
Object literal(String value)
value
- String literal
Object qname(String prefix, String name)
prefix
- String prefixname
- String name
Object sum(Object[] arguments)
arguments
- are EXPRESSION objects
Object minus(Object left, Object right)
left
- is an EXPRESSION objectright
- is an EXPRESSION object
Object multiply(Object left, Object right)
left
- is an EXPRESSION objectright
- is an EXPRESSION object
Object divide(Object left, Object right)
left
- is an EXPRESSION objectright
- is an EXPRESSION object
Object mod(Object left, Object right)
left
- is an EXPRESSION objectright
- is an EXPRESSION object
Object lessThan(Object left, Object right)
left
- is an EXPRESSION objectright
- is an EXPRESSION object
Object lessThanOrEqual(Object left, Object right)
left
- is an EXPRESSION objectright
- is an EXPRESSION object
Object greaterThan(Object left, Object right)
left
- is an EXPRESSION objectright
- is an EXPRESSION object
Object greaterThanOrEqual(Object left, Object right)
left
- is an EXPRESSION objectright
- is an EXPRESSION object
Object equal(Object left, Object right)
left
- is an EXPRESSION objectright
- is an EXPRESSION object
Object notEqual(Object left, Object right)
left
- is an EXPRESSION objectright
- is an EXPRESSION object
Object minus(Object argument)
argument
- is an EXPRESSION object
Object variableReference(Object qname)
qname
- is a QNAME object
Object function(int code, Object[] args)
code
- is one of FUNCTION_... constantsargs
- are EXPRESSION objects
Object function(Object name, Object[] args)
name
- is a QNAME object (function name)args
- are EXPRESSION objects
Object and(Object[] arguments)
arguments
- are EXPRESSION objects
Object or(Object[] arguments)
arguments
- are EXPRESSION objects
Object union(Object[] arguments)
arguments
- are EXPRESSION objects
Object nodeNameTest(Object qname)
qname
- is a QNAME object
Object nodeTypeTest(int nodeType)
nodeType
- is a NODE_TEST object
Object processingInstructionTest(String instruction)
instruction
- is a NODE_TEST object
Object step(int axis, Object nodeTest, Object[] predicates)
axis
- is one of the AXIS_... constantsnodeTest
- is a NODE_TEST objectpredicates
- are EXPRESSION objects
Object locationPath(boolean absolute, Object[] steps)
absolute
- indicates whether the path is absolutesteps
- are STEP objects
Object expressionPath(Object expression, Object[] predicates, Object[] steps)
expression
- is an EXPRESSION objectpredicates
- are EXPRESSION objectssteps
- are STEP objects
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