com.intellij.rt.coverage.instrumentation.filters.branches

Class JavaStringSwitchFilter

java.lang.Object

org.jetbrains.coverage.org.objectweb.asm.MethodVisitor

com.intellij.rt.coverage.instrumentation.filters.lines.CoverageFilter

com.intellij.rt.coverage.instrumentation.filters.branches.JavaStringSwitchFilter

public class JavaStringSwitchFilter
extends CoverageFilter

In switch by String, Java compiler generates extra branches. Firstly, check for null string if applicable:

1. ICONST_M1
2. ISTORE slot
3. ALOAD
4. INVOKEVIRTUAL java/lang/String.hashCode ()I
5. LOOKUPSWITCH (default: label)

And then in each branch of the switch there is a check for equality:

1. ALOAD
2. LDC String
3. INVOKEVIRTUAL java/lang/String.equals (Ljava/lang/Object;)Z
4. IFEQ label
5. ICONST 0 / 1 / ... / BIPUSH
6. ISTORE slot
7. GOTO label (absent for the last branch)

And then another switch by slot:

1. LABEL label
2. ILOAD slot
3. LOOKUPSWITCH

All branches except for the last switch should be ignored.

Field Summary

Fields inherited from class com.intellij.rt.coverage.instrumentation.filters.lines.CoverageFilter

myContext

Fields inherited from class org.jetbrains.coverage.org.objectweb.asm.MethodVisitor

api, mv

Constructor Summary

Constructors

Constructor and Description
JavaStringSwitchFilter()

Method Summary

Modifier and Type	Method and Description
boolean	isApplicable(InstrumentationData context)
void	visitFieldInsn(int opcode, java.lang.String owner, java.lang.String name, java.lang.String descriptor)
void	visitIincInsn(int varIndex, int increment)
void	visitInsn(int opcode)
void	visitIntInsn(int opcode, int operand)
void	visitInvokeDynamicInsn(java.lang.String name, java.lang.String descriptor, org.jetbrains.coverage.org.objectweb.asm.Handle bootstrapMethodHandle, java.lang.Object... bootstrapMethodArguments)
void	visitJumpInsn(int opcode, org.jetbrains.coverage.org.objectweb.asm.Label label)
void	visitLabel(org.jetbrains.coverage.org.objectweb.asm.Label label)
void	visitLdcInsn(java.lang.Object value)
void	visitLineNumber(int line, org.jetbrains.coverage.org.objectweb.asm.Label start)
void	visitLookupSwitchInsn(org.jetbrains.coverage.org.objectweb.asm.Label dflt, int[] keys, org.jetbrains.coverage.org.objectweb.asm.Label[] labels)
void	visitMethodInsn(int opcode, java.lang.String owner, java.lang.String name, java.lang.String descriptor, boolean isInterface)
void	visitMultiANewArrayInsn(java.lang.String descriptor, int numDimensions)
void	visitTableSwitchInsn(int min, int max, org.jetbrains.coverage.org.objectweb.asm.Label dflt, org.jetbrains.coverage.org.objectweb.asm.Label... labels)
void	visitTypeInsn(int opcode, java.lang.String type)
void	visitVarInsn(int opcode, int varIndex)

Methods inherited from class com.intellij.rt.coverage.instrumentation.filters.lines.CoverageFilter

initFilter

Methods inherited from class org.jetbrains.coverage.org.objectweb.asm.MethodVisitor

getDelegate, visitAnnotableParameterCount, visitAnnotation, visitAnnotationDefault, visitAttribute, visitCode, visitEnd, visitFrame, visitInsnAnnotation, visitLocalVariable, visitLocalVariableAnnotation, visitMaxs, visitMethodInsn, visitParameter, visitParameterAnnotation, visitTryCatchAnnotation, visitTryCatchBlock, visitTypeAnnotation

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

JavaStringSwitchFilter

public JavaStringSwitchFilter()

Method Detail

isApplicable

public boolean isApplicable(InstrumentationData context)

Specified by:

isApplicable in class CoverageFilter

visitInsn

public void visitInsn(int opcode)

Overrides:

visitInsn in class org.jetbrains.coverage.org.objectweb.asm.MethodVisitor

visitIntInsn

public void visitIntInsn(int opcode,
                         int operand)

Overrides:

visitIntInsn in class org.jetbrains.coverage.org.objectweb.asm.MethodVisitor

visitVarInsn

public void visitVarInsn(int opcode,
                         int varIndex)

Overrides:

visitVarInsn in class org.jetbrains.coverage.org.objectweb.asm.MethodVisitor

visitMethodInsn

public void visitMethodInsn(int opcode,
                            java.lang.String owner,
                            java.lang.String name,
                            java.lang.String descriptor,
                            boolean isInterface)

Overrides:

visitMethodInsn in class org.jetbrains.coverage.org.objectweb.asm.MethodVisitor

visitTableSwitchInsn

public void visitTableSwitchInsn(int min,
                                 int max,
                                 org.jetbrains.coverage.org.objectweb.asm.Label dflt,
                                 org.jetbrains.coverage.org.objectweb.asm.Label... labels)

Overrides:

visitTableSwitchInsn in class org.jetbrains.coverage.org.objectweb.asm.MethodVisitor

visitLookupSwitchInsn

public void visitLookupSwitchInsn(org.jetbrains.coverage.org.objectweb.asm.Label dflt,
                                  int[] keys,
                                  org.jetbrains.coverage.org.objectweb.asm.Label[] labels)

Overrides:

visitLookupSwitchInsn in class org.jetbrains.coverage.org.objectweb.asm.MethodVisitor

visitLdcInsn

public void visitLdcInsn(java.lang.Object value)

Overrides:

visitLdcInsn in class org.jetbrains.coverage.org.objectweb.asm.MethodVisitor

visitJumpInsn

public void visitJumpInsn(int opcode,
                          org.jetbrains.coverage.org.objectweb.asm.Label label)

Overrides:

visitJumpInsn in class org.jetbrains.coverage.org.objectweb.asm.MethodVisitor

visitLabel

public void visitLabel(org.jetbrains.coverage.org.objectweb.asm.Label label)

Overrides:

visitLabel in class org.jetbrains.coverage.org.objectweb.asm.MethodVisitor

visitInvokeDynamicInsn

public void visitInvokeDynamicInsn(java.lang.String name,
                                   java.lang.String descriptor,
                                   org.jetbrains.coverage.org.objectweb.asm.Handle bootstrapMethodHandle,
                                   java.lang.Object... bootstrapMethodArguments)

Overrides:

visitInvokeDynamicInsn in class org.jetbrains.coverage.org.objectweb.asm.MethodVisitor

visitIincInsn

public void visitIincInsn(int varIndex,
                          int increment)

Overrides:

visitIincInsn in class org.jetbrains.coverage.org.objectweb.asm.MethodVisitor

visitTypeInsn

public void visitTypeInsn(int opcode,
                          java.lang.String type)

Overrides:

visitTypeInsn in class org.jetbrains.coverage.org.objectweb.asm.MethodVisitor

visitMultiANewArrayInsn

public void visitMultiANewArrayInsn(java.lang.String descriptor,
                                    int numDimensions)

Overrides:

visitMultiANewArrayInsn in class org.jetbrains.coverage.org.objectweb.asm.MethodVisitor

visitFieldInsn

public void visitFieldInsn(int opcode,
                           java.lang.String owner,
                           java.lang.String name,
                           java.lang.String descriptor)

Overrides:

visitFieldInsn in class org.jetbrains.coverage.org.objectweb.asm.MethodVisitor

visitLineNumber

public void visitLineNumber(int line,
                            org.jetbrains.coverage.org.objectweb.asm.Label start)

Overrides:

visitLineNumber in class org.jetbrains.coverage.org.objectweb.asm.MethodVisitor