Package com.saxonica.ee.bytecode
Class LiteralCompiler
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- com.saxonica.ee.bytecode.ExpressionCompiler
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- com.saxonica.ee.bytecode.LiteralCompiler
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public class LiteralCompiler extends ExpressionCompiler
Generate byte code for a literal expression in the expression tree
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Constructor Summary
Constructors Constructor Description LiteralCompiler()
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description voidcompileToBoolean(CompilerService compiler, Expression expression)Generate bytecode to evaluate the expression as a boolean Precondition: none.voidcompileToItem(CompilerService compiler, Expression expression)Generate bytecode to evaluate the expression as an Item Precondition: none.voidcompileToIterator(CompilerService compiler, Expression expression)Generate bytecode to evaluate the expression as aSequenceIteratorPrecondition: none.voidcompileToPrimitive(CompilerService compiler, Expression expression, java.lang.Class requiredClass, OnEmpty onEmpty)Generate bytecode to evaluate the expression leaving a plain Java value on the stack.voidcompileToPush(CompilerService compiler, Expression expression)Generate bytecode to evaluate the expression in push mode Precondition: none.-
Methods inherited from class com.saxonica.ee.bytecode.ExpressionCompiler
allocateStatic, compileItemFromInt, generateMethod, handleEmptyStringResult, printStackTop, verify, visitAnnotation, visitLineNumber
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Method Detail
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compileToItem
public void compileToItem(CompilerService compiler, Expression expression) throws CannotCompileException
Description copied from class:ExpressionCompilerGenerate bytecode to evaluate the expression as an Item Precondition: none. Postcondition: at execution time, the stack contains either an item (the result of the expression), or null (representing an empty sequence).- Specified by:
compileToItemin classExpressionCompiler- Parameters:
compiler- the compiler serviceexpression- the expression to be compiled- Throws:
CannotCompileException- if the expression cannot be compiled to bytecode
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compileToPrimitive
public void compileToPrimitive(CompilerService compiler, Expression expression, java.lang.Class requiredClass, OnEmpty onEmpty) throws CannotCompileException
Generate bytecode to evaluate the expression leaving a plain Java value on the stack. The static type of the expression must be such that the value is known to be representable by a value of the specified class; the cardinality must be either exactly-one or zero-or-one.- Overrides:
compileToPrimitivein classExpressionCompiler- Parameters:
compiler- the compiler serviceexpression- the expression to be compiledrequiredClass- the class of the Java value that is to be left on the stack if the generated code exits normally. This must be one of Integer.TYPE, Double.TYPE, Float.TYPE, BigDecimal.class, CharSequence.class.onEmpty- action to be performed if the value of the expression is an empty sequence- Throws:
CannotCompileException- if the expression cannot be compiled to bytecode
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compileToIterator
public void compileToIterator(CompilerService compiler, Expression expression) throws CannotCompileException
Description copied from class:ExpressionCompilerGenerate bytecode to evaluate the expression as aSequenceIteratorPrecondition: none. Postcondition: at execution time, the stack contains a SequenceIterator representing the result of the expression- Specified by:
compileToIteratorin classExpressionCompiler- Parameters:
compiler- the compiler serviceexpression- the expression to be compiled- Throws:
CannotCompileException- if the expression cannot be compiled to bytecode
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compileToBoolean
public void compileToBoolean(CompilerService compiler, Expression expression) throws CannotCompileException
Description copied from class:ExpressionCompilerGenerate bytecode to evaluate the expression as a boolean Precondition: none. Postcondition: at execution time, the stack contains an integer (0=false, 1=true) representing the result of the expression- Specified by:
compileToBooleanin classExpressionCompiler- Parameters:
compiler- the compiler serviceexpression- the expression to be compiled- Throws:
CannotCompileException- if the expression cannot be compiled to bytecode
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compileToPush
public void compileToPush(CompilerService compiler, Expression expression) throws CannotCompileException
Description copied from class:ExpressionCompilerGenerate bytecode to evaluate the expression in push mode Precondition: none. Postcondition: at execution time, the stack is unchanged, and the value of the expression has been written to the current receiver- Specified by:
compileToPushin classExpressionCompiler- Parameters:
compiler- the compiler serviceexpression- the expression to be compiled- Throws:
CannotCompileException- if the expression cannot be compiled to bytecode
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