ToStringCompiler

java.lang.Object
- com.saxonica.ee.bytecode.ExpressionCompiler
- - com.saxonica.ee.bytecode.ToItemCompiler
  - - com.saxonica.ee.bytecode.ToStringCompiler

Direct Known Subclasses:

ConcatCompiler, ForceCaseCompiler, GenerateIdCompiler, NodePropertyCompiler, NormalizeSpaceCompiler, StringFnCompiler, StringJoinCompiler, SubstringAfterCompiler, SubstringBeforeCompiler, TranslateCompiler
```
public abstract class ToStringCompiler
extends ToItemCompiler
```
Generate bytecode for evaluation of expressions that return a single string (or an empty sequence)

Constructor Summary

Constructors
Constructor Description

ToStringCompiler()

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`protected void`	`compileItemFromString(CompilerService compiler, Expression expression)`	Helper method to implement compileFromItem when the class implements compileToPrimitive
`void`	`compileToItem(CompilerService compiler, Expression expression)`	Generate bytecode to evaluate the expression as an Item Precondition: none.

Methods inherited from class com.saxonica.ee.bytecode.ToItemCompiler
compileToBoolean, compileToIterator, compileToPush, returnZeroLengthStringIfNull

Methods inherited from class com.saxonica.ee.bytecode.ExpressionCompiler
allocateStatic, compileItemFromInt, compileToPrimitive, generateMethod, handleEmptyStringResult, printStackTop, verify, visitAnnotation, visitLineNumber

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - ToStringCompiler
```
public ToStringCompiler()
```
- Method Detail
  - compileToItem
```
public final void compileToItem(CompilerService compiler,
                                Expression expression)
                         throws CannotCompileException
```
    Generate 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:
    
    compileToItem in class ExpressionCompiler
    
    Parameters:
    
    compiler - the compiler service
    
    expression - the expression to be compiled
    
    Throws:
    
    CannotCompileException - if the expression cannot be compiled to bytecode
  - compileItemFromString
```
protected final void compileItemFromString(CompilerService compiler,
                                           Expression expression)
                                    throws CannotCompileException
```
    Helper method to implement compileFromItem when the class implements compileToPrimitive
    
    Parameters:
    
    compiler - the compiler service
    
    expression - the expression to be compiled
    
    Throws:
    
    CannotCompileException - if the expression cannot be compiled to bytecode