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java.lang.Objectorg.codehaus.groovy.classgen.CompileStack
public class CompileStack
This class is a helper for AsmClassGenerator. It manages different aspects of the code of a code block like handling labels, defining variables, and scopes. After a MethodNode is visited clear should be called, for initialization the method init should be used.
Some Notes:
AsmClassGenerator
Field Summary |
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Fields inherited from interface org.objectweb.asm.Opcodes |
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AALOAD, AASTORE, ACC_ABSTRACT, ACC_ANNOTATION, ACC_BRIDGE, ACC_DEPRECATED, ACC_ENUM, ACC_FINAL, ACC_INTERFACE, ACC_NATIVE, ACC_PRIVATE, ACC_PROTECTED, ACC_PUBLIC, ACC_STATIC, ACC_STRICT, ACC_SUPER, ACC_SYNCHRONIZED, ACC_SYNTHETIC, ACC_TRANSIENT, ACC_VARARGS, ACC_VOLATILE, ACONST_NULL, ALOAD, ANEWARRAY, ARETURN, ARRAYLENGTH, ASTORE, ATHROW, BALOAD, BASTORE, BIPUSH, CALOAD, CASTORE, CHECKCAST, D2F, D2I, D2L, DADD, DALOAD, DASTORE, DCMPG, DCMPL, DCONST_0, DCONST_1, DDIV, DLOAD, DMUL, DNEG, DREM, DRETURN, DSTORE, DSUB, DUP, DUP_X1, DUP_X2, DUP2, DUP2_X1, DUP2_X2, F2D, F2I, F2L, FADD, FALOAD, FASTORE, FCMPG, FCMPL, FCONST_0, FCONST_1, FCONST_2, FDIV, FLOAD, FMUL, FNEG, FREM, FRETURN, FSTORE, FSUB, GETFIELD, GETSTATIC, GOTO, I2B, I2C, I2D, I2F, I2L, I2S, IADD, IALOAD, IAND, IASTORE, ICONST_0, ICONST_1, ICONST_2, ICONST_3, ICONST_4, ICONST_5, ICONST_M1, IDIV, IF_ACMPEQ, IF_ACMPNE, IF_ICMPEQ, IF_ICMPGE, IF_ICMPGT, IF_ICMPLE, IF_ICMPLT, IF_ICMPNE, IFEQ, IFGE, IFGT, IFLE, IFLT, IFNE, IFNONNULL, IFNULL, IINC, ILOAD, IMUL, INEG, INSTANCEOF, INVOKEINTERFACE, INVOKESPECIAL, INVOKESTATIC, INVOKEVIRTUAL, IOR, IREM, IRETURN, ISHL, ISHR, ISTORE, ISUB, IUSHR, IXOR, JSR, L2D, L2F, L2I, LADD, LALOAD, LAND, LASTORE, LCMP, LCONST_0, LCONST_1, LDC, LDIV, LLOAD, LMUL, LNEG, LOOKUPSWITCH, LOR, LREM, LRETURN, LSHL, LSHR, LSTORE, LSUB, LUSHR, LXOR, MONITORENTER, MONITOREXIT, MULTIANEWARRAY, NEW, NEWARRAY, NOP, POP, POP2, PUTFIELD, PUTSTATIC, RET, RETURN, SALOAD, SASTORE, SIPUSH, SWAP, T_BOOLEAN, T_BYTE, T_CHAR, T_DOUBLE, T_FLOAT, T_INT, T_LONG, T_SHORT, TABLESWITCH, V1_1, V1_2, V1_3, V1_4, V1_5, V1_6 |
Constructor Summary | |
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CompileStack()
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Method Summary | |
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void |
applyFinallyBlocks()
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void |
applyFinallyBlocks(org.objectweb.asm.Label label,
boolean isBreakLabel)
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void |
clear()
Clears the state of the class. |
boolean |
containsVariable(String name)
Returns true if a varibale is already defined |
org.objectweb.asm.Label |
createLocalLabel(String name)
creates a new named label |
int |
defineTemporaryVariable(String name,
boolean store)
creates a temporary variable. |
int |
defineTemporaryVariable(String name,
ClassNode node,
boolean store)
creates a temporary variable. |
int |
defineTemporaryVariable(Variable var,
boolean store)
creates a temporary variable. |
Variable |
defineVariable(Variable v,
boolean initFromStack)
Defines a new Variable using an AST variable. |
org.objectweb.asm.Label |
getBreakLabel()
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org.objectweb.asm.Label |
getContinueLabel()
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int |
getCurrentClassIndex()
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int |
getCurrentMetaClassIndex()
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org.objectweb.asm.Label |
getLabel(String name)
Returns the label for the given name |
protected org.objectweb.asm.Label |
getNamedBreakLabel(String name)
Used for break foo inside a loop to end the
execution of the marked loop. |
protected org.objectweb.asm.Label |
getNamedContinueLabel(String name)
Used for continue foo inside a loop to continue
the execution of the marked loop. |
VariableScope |
getScope()
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Variable |
getVariable(String variableName)
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Variable |
getVariable(String variableName,
boolean mustExist)
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boolean |
hasFinallyBlocks()
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protected void |
init(VariableScope el,
Parameter[] parameters,
org.objectweb.asm.MethodVisitor mv,
ClassNode cn)
initializes this class for a MethodNode. |
void |
pop()
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void |
popFinallyBlock()
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protected void |
pushBooleanExpression()
because a boolean Expression may not be evaluated completly it is important to keep the registers clean |
void |
pushFinallyBlock(Runnable block)
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protected void |
pushLoop(String labelName)
Should be called when decending into a loop that does not define a scope. |
protected void |
pushLoop(VariableScope el,
String labelName)
Should be called when decending into a loop that defines also a scope. |
protected org.objectweb.asm.Label |
pushSwitch()
Creates a new break label and a element for the state stack so pop has to be called later |
protected void |
pushVariableScope(VariableScope el)
Causes the statestack to add an element and sets the given scope as new current variable scope. |
void |
removeVar(int tempIndex)
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void |
setCurrentClassIndex(int index)
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void |
setCurrentMetaClassIndex(int index)
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Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
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public CompileStack()
Method Detail |
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public org.objectweb.asm.Label getContinueLabel()
public org.objectweb.asm.Label getBreakLabel()
public void removeVar(int tempIndex)
public void pop()
public VariableScope getScope()
public int defineTemporaryVariable(Variable var, boolean store)
var
- defines type and namestore
- defines if the toplevel argument of the stack should be stored
public Variable getVariable(String variableName)
public Variable getVariable(String variableName, boolean mustExist)
public int defineTemporaryVariable(String name, boolean store)
name
- defines type and namestore
- defines if the toplevel argument of the stack should be stored
public int defineTemporaryVariable(String name, ClassNode node, boolean store)
name
- defines the namenode
- defines the nodestore
- defines if the toplevel argument of the stack should be stored
public void clear()
protected void init(VariableScope el, Parameter[] parameters, org.objectweb.asm.MethodVisitor mv, ClassNode cn)
protected void pushVariableScope(VariableScope el)
protected void pushLoop(VariableScope el, String labelName)
protected void pushLoop(String labelName)
protected org.objectweb.asm.Label getNamedBreakLabel(String name)
break foo
inside a loop to end the
execution of the marked loop. This method will return the
break label of the loop if there is one found for the name.
If not, the current break label is returned.
protected org.objectweb.asm.Label getNamedContinueLabel(String name)
continue foo
inside a loop to continue
the execution of the marked loop. This method will return
the break label of the loop if there is one found for the
name. If not, getLabel is used.
protected org.objectweb.asm.Label pushSwitch()
protected void pushBooleanExpression()
public Variable defineVariable(Variable v, boolean initFromStack)
initFromStack
- if true the last element of the
stack will be used to initilize
the new variable. If false null
will be used.public boolean containsVariable(String name)
public org.objectweb.asm.Label getLabel(String name)
public org.objectweb.asm.Label createLocalLabel(String name)
public int getCurrentClassIndex()
public void setCurrentClassIndex(int index)
public int getCurrentMetaClassIndex()
public void setCurrentMetaClassIndex(int index)
public void applyFinallyBlocks(org.objectweb.asm.Label label, boolean isBreakLabel)
public void applyFinallyBlocks()
public boolean hasFinallyBlocks()
public void pushFinallyBlock(Runnable block)
public void popFinallyBlock()
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