Java Code Examples for org.springframework.expression.spel.CodeFlow#enterCompilationScope()
The following examples show how to use
org.springframework.expression.spel.CodeFlow#enterCompilationScope() .
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Example 1
| Source File: SpelNodeImpl.java From lams with GNU General Public License v2.0 | 6 votes |
|
/**
* Ask an argument to generate its bytecode and then follow it up
* with any boxing/unboxing/checkcasting to ensure it matches the expected parameter descriptor.
*/
protected static void generateCodeForArgument(MethodVisitor mv, CodeFlow cf, SpelNodeImpl argument, String paramDesc) {
cf.enterCompilationScope();
argument.generateCode(mv, cf);
String lastDesc = cf.lastDescriptor();
boolean primitiveOnStack = CodeFlow.isPrimitive(lastDesc);
// Check if need to box it for the method reference?
if (primitiveOnStack && paramDesc.charAt(0) == 'L') {
CodeFlow.insertBoxIfNecessary(mv, lastDesc.charAt(0));
}
else if (paramDesc.length() == 1 && !primitiveOnStack) {
CodeFlow.insertUnboxInsns(mv, paramDesc.charAt(0), lastDesc);
}
else if (!paramDesc.equals(lastDesc)) {
// This would be unnecessary in the case of subtyping (e.g. method takes Number but Integer passed in)
CodeFlow.insertCheckCast(mv, paramDesc);
}
cf.exitCompilationScope();
}
Example 2
| Source File: OpPlus.java From lams with GNU General Public License v2.0 | 6 votes |
|
/**
* Walk through a possible tree of nodes that combine strings and append
* them all to the same (on stack) StringBuilder.
*/
private void walk(MethodVisitor mv, CodeFlow cf, SpelNodeImpl operand) {
if (operand instanceof OpPlus) {
OpPlus plus = (OpPlus)operand;
walk(mv, cf, plus.getLeftOperand());
walk(mv, cf, plus.getRightOperand());
}
else {
cf.enterCompilationScope();
operand.generateCode(mv,cf);
if (!"Ljava/lang/String".equals(cf.lastDescriptor())) {
mv.visitTypeInsn(CHECKCAST, "java/lang/String");
}
cf.exitCompilationScope();
mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/StringBuilder", "append", "(Ljava/lang/String;)Ljava/lang/StringBuilder;", false);
}
}
Example 3
| Source File: OpAnd.java From spring-analysis-note with MIT License | 6 votes |
|
@Override
public void generateCode(MethodVisitor mv, CodeFlow cf) {
// Pseudo: if (!leftOperandValue) { result=false; } else { result=rightOperandValue; }
Label elseTarget = new Label();
Label endOfIf = new Label();
cf.enterCompilationScope();
getLeftOperand().generateCode(mv, cf);
cf.unboxBooleanIfNecessary(mv);
cf.exitCompilationScope();
mv.visitJumpInsn(IFNE, elseTarget);
mv.visitLdcInsn(0); // FALSE
mv.visitJumpInsn(GOTO,endOfIf);
mv.visitLabel(elseTarget);
cf.enterCompilationScope();
getRightOperand().generateCode(mv, cf);
cf.unboxBooleanIfNecessary(mv);
cf.exitCompilationScope();
mv.visitLabel(endOfIf);
cf.pushDescriptor(this.exitTypeDescriptor);
}
Example 4
| Source File: OpAnd.java From java-technology-stack with MIT License | 6 votes |
|
@Override
public void generateCode(MethodVisitor mv, CodeFlow cf) {
// Pseudo: if (!leftOperandValue) { result=false; } else { result=rightOperandValue; }
Label elseTarget = new Label();
Label endOfIf = new Label();
cf.enterCompilationScope();
getLeftOperand().generateCode(mv, cf);
cf.unboxBooleanIfNecessary(mv);
cf.exitCompilationScope();
mv.visitJumpInsn(IFNE, elseTarget);
mv.visitLdcInsn(0); // FALSE
mv.visitJumpInsn(GOTO,endOfIf);
mv.visitLabel(elseTarget);
cf.enterCompilationScope();
getRightOperand().generateCode(mv, cf);
cf.unboxBooleanIfNecessary(mv);
cf.exitCompilationScope();
mv.visitLabel(endOfIf);
cf.pushDescriptor(this.exitTypeDescriptor);
}
Example 5
| Source File: OpAnd.java From lams with GNU General Public License v2.0 | 6 votes |
|
@Override
public void generateCode(MethodVisitor mv, CodeFlow cf) {
// Pseudo: if (!leftOperandValue) { result=false; } else { result=rightOperandValue; }
Label elseTarget = new Label();
Label endOfIf = new Label();
cf.enterCompilationScope();
getLeftOperand().generateCode(mv, cf);
cf.unboxBooleanIfNecessary(mv);
cf.exitCompilationScope();
mv.visitJumpInsn(IFNE, elseTarget);
mv.visitLdcInsn(0); // FALSE
mv.visitJumpInsn(GOTO,endOfIf);
mv.visitLabel(elseTarget);
cf.enterCompilationScope();
getRightOperand().generateCode(mv, cf);
cf.unboxBooleanIfNecessary(mv);
cf.exitCompilationScope();
mv.visitLabel(endOfIf);
cf.pushDescriptor(this.exitTypeDescriptor);
}
Example 6
| Source File: SpelNodeImpl.java From spring-analysis-note with MIT License | 6 votes |
|
/**
* Ask an argument to generate its bytecode and then follow it up
* with any boxing/unboxing/checkcasting to ensure it matches the expected parameter descriptor.
*/
protected static void generateCodeForArgument(MethodVisitor mv, CodeFlow cf, SpelNodeImpl argument, String paramDesc) {
cf.enterCompilationScope();
argument.generateCode(mv, cf);
String lastDesc = cf.lastDescriptor();
Assert.state(lastDesc != null, "No last descriptor");
boolean primitiveOnStack = CodeFlow.isPrimitive(lastDesc);
// Check if need to box it for the method reference?
if (primitiveOnStack && paramDesc.charAt(0) == 'L') {
CodeFlow.insertBoxIfNecessary(mv, lastDesc.charAt(0));
}
else if (paramDesc.length() == 1 && !primitiveOnStack) {
CodeFlow.insertUnboxInsns(mv, paramDesc.charAt(0), lastDesc);
}
else if (!paramDesc.equals(lastDesc)) {
// This would be unnecessary in the case of subtyping (e.g. method takes Number but Integer passed in)
CodeFlow.insertCheckCast(mv, paramDesc);
}
cf.exitCompilationScope();
}
Example 7
| Source File: OpAnd.java From spring4-understanding with Apache License 2.0 | 6 votes |
|
@Override
public void generateCode(MethodVisitor mv, CodeFlow cf) {
// Pseudo: if (!leftOperandValue) { result=false; } else { result=rightOperandValue; }
Label elseTarget = new Label();
Label endOfIf = new Label();
cf.enterCompilationScope();
getLeftOperand().generateCode(mv, cf);
cf.unboxBooleanIfNecessary(mv);
cf.exitCompilationScope();
mv.visitJumpInsn(IFNE, elseTarget);
mv.visitLdcInsn(0); // FALSE
mv.visitJumpInsn(GOTO,endOfIf);
mv.visitLabel(elseTarget);
cf.enterCompilationScope();
getRightOperand().generateCode(mv, cf);
cf.unboxBooleanIfNecessary(mv);
cf.exitCompilationScope();
mv.visitLabel(endOfIf);
cf.pushDescriptor(this.exitTypeDescriptor);
}
Example 8
| Source File: OpModulus.java From java-technology-stack with MIT License | 5 votes |
|
@Override
public void generateCode(MethodVisitor mv, CodeFlow cf) {
getLeftOperand().generateCode(mv, cf);
String leftDesc = getLeftOperand().exitTypeDescriptor;
String exitDesc = this.exitTypeDescriptor;
Assert.state(exitDesc != null, "No exit type descriptor");
char targetDesc = exitDesc.charAt(0);
CodeFlow.insertNumericUnboxOrPrimitiveTypeCoercion(mv, leftDesc, targetDesc);
if (this.children.length > 1) {
cf.enterCompilationScope();
getRightOperand().generateCode(mv, cf);
String rightDesc = getRightOperand().exitTypeDescriptor;
cf.exitCompilationScope();
CodeFlow.insertNumericUnboxOrPrimitiveTypeCoercion(mv, rightDesc, targetDesc);
switch (targetDesc) {
case 'I':
mv.visitInsn(IREM);
break;
case 'J':
mv.visitInsn(LREM);
break;
case 'F':
mv.visitInsn(FREM);
break;
case 'D':
mv.visitInsn(DREM);
break;
default:
throw new IllegalStateException(
"Unrecognized exit type descriptor: '" + this.exitTypeDescriptor + "'");
}
}
cf.pushDescriptor(this.exitTypeDescriptor);
}
Example 9
| Source File: OpDivide.java From java-technology-stack with MIT License | 5 votes |
|
@Override
public void generateCode(MethodVisitor mv, CodeFlow cf) {
getLeftOperand().generateCode(mv, cf);
String leftDesc = getLeftOperand().exitTypeDescriptor;
String exitDesc = this.exitTypeDescriptor;
Assert.state(exitDesc != null, "No exit type descriptor");
char targetDesc = exitDesc.charAt(0);
CodeFlow.insertNumericUnboxOrPrimitiveTypeCoercion(mv, leftDesc, targetDesc);
if (this.children.length > 1) {
cf.enterCompilationScope();
getRightOperand().generateCode(mv, cf);
String rightDesc = getRightOperand().exitTypeDescriptor;
cf.exitCompilationScope();
CodeFlow.insertNumericUnboxOrPrimitiveTypeCoercion(mv, rightDesc, targetDesc);
switch (targetDesc) {
case 'I':
mv.visitInsn(IDIV);
break;
case 'J':
mv.visitInsn(LDIV);
break;
case 'F':
mv.visitInsn(FDIV);
break;
case 'D':
mv.visitInsn(DDIV);
break;
default:
throw new IllegalStateException(
"Unrecognized exit type descriptor: '" + this.exitTypeDescriptor + "'");
}
}
cf.pushDescriptor(this.exitTypeDescriptor);
}
Example 10
| Source File: Elvis.java From java-technology-stack with MIT License | 5 votes |
|
@Override
public void generateCode(MethodVisitor mv, CodeFlow cf) {
// exit type descriptor can be null if both components are literal expressions
computeExitTypeDescriptor();
cf.enterCompilationScope();
this.children[0].generateCode(mv, cf);
String lastDesc = cf.lastDescriptor();
Assert.state(lastDesc != null, "No last descriptor");
CodeFlow.insertBoxIfNecessary(mv, lastDesc.charAt(0));
cf.exitCompilationScope();
Label elseTarget = new Label();
Label endOfIf = new Label();
mv.visitInsn(DUP);
mv.visitJumpInsn(IFNULL, elseTarget);
// Also check if empty string, as per the code in the interpreted version
mv.visitInsn(DUP);
mv.visitLdcInsn("");
mv.visitInsn(SWAP);
mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/String", "equals", "(Ljava/lang/Object;)Z",false);
mv.visitJumpInsn(IFEQ, endOfIf); // if not empty, drop through to elseTarget
mv.visitLabel(elseTarget);
mv.visitInsn(POP);
cf.enterCompilationScope();
this.children[1].generateCode(mv, cf);
if (!CodeFlow.isPrimitive(this.exitTypeDescriptor)) {
lastDesc = cf.lastDescriptor();
Assert.state(lastDesc != null, "No last descriptor");
CodeFlow.insertBoxIfNecessary(mv, lastDesc.charAt(0));
}
cf.exitCompilationScope();
mv.visitLabel(endOfIf);
cf.pushDescriptor(this.exitTypeDescriptor);
}
Example 11
| Source File: Ternary.java From java-technology-stack with MIT License | 5 votes |
|
@Override
public void generateCode(MethodVisitor mv, CodeFlow cf) {
// May reach here without it computed if all elements are literals
computeExitTypeDescriptor();
cf.enterCompilationScope();
this.children[0].generateCode(mv, cf);
String lastDesc = cf.lastDescriptor();
Assert.state(lastDesc != null, "No last descriptor");
if (!CodeFlow.isPrimitive(lastDesc)) {
CodeFlow.insertUnboxInsns(mv, 'Z', lastDesc);
}
cf.exitCompilationScope();
Label elseTarget = new Label();
Label endOfIf = new Label();
mv.visitJumpInsn(IFEQ, elseTarget);
cf.enterCompilationScope();
this.children[1].generateCode(mv, cf);
if (!CodeFlow.isPrimitive(this.exitTypeDescriptor)) {
lastDesc = cf.lastDescriptor();
Assert.state(lastDesc != null, "No last descriptor");
CodeFlow.insertBoxIfNecessary(mv, lastDesc.charAt(0));
}
cf.exitCompilationScope();
mv.visitJumpInsn(GOTO, endOfIf);
mv.visitLabel(elseTarget);
cf.enterCompilationScope();
this.children[2].generateCode(mv, cf);
if (!CodeFlow.isPrimitive(this.exitTypeDescriptor)) {
lastDesc = cf.lastDescriptor();
Assert.state(lastDesc != null, "No last descriptor");
CodeFlow.insertBoxIfNecessary(mv, lastDesc.charAt(0));
}
cf.exitCompilationScope();
mv.visitLabel(endOfIf);
cf.pushDescriptor(this.exitTypeDescriptor);
}
Example 12
| Source File: OpMultiply.java From spring-analysis-note with MIT License | 5 votes |
|
@Override
public void generateCode(MethodVisitor mv, CodeFlow cf) {
getLeftOperand().generateCode(mv, cf);
String leftDesc = getLeftOperand().exitTypeDescriptor;
String exitDesc = this.exitTypeDescriptor;
Assert.state(exitDesc != null, "No exit type descriptor");
char targetDesc = exitDesc.charAt(0);
CodeFlow.insertNumericUnboxOrPrimitiveTypeCoercion(mv, leftDesc, targetDesc);
if (this.children.length > 1) {
cf.enterCompilationScope();
getRightOperand().generateCode(mv, cf);
String rightDesc = getRightOperand().exitTypeDescriptor;
cf.exitCompilationScope();
CodeFlow.insertNumericUnboxOrPrimitiveTypeCoercion(mv, rightDesc, targetDesc);
switch (targetDesc) {
case 'I':
mv.visitInsn(IMUL);
break;
case 'J':
mv.visitInsn(LMUL);
break;
case 'F':
mv.visitInsn(FMUL);
break;
case 'D':
mv.visitInsn(DMUL);
break;
default:
throw new IllegalStateException(
"Unrecognized exit type descriptor: '" + this.exitTypeDescriptor + "'");
}
}
cf.pushDescriptor(this.exitTypeDescriptor);
}
Example 13
| Source File: OpEQ.java From spring-analysis-note with MIT License | 5 votes |
|
@Override
public void generateCode(MethodVisitor mv, CodeFlow cf) {
cf.loadEvaluationContext(mv);
String leftDesc = getLeftOperand().exitTypeDescriptor;
String rightDesc = getRightOperand().exitTypeDescriptor;
boolean leftPrim = CodeFlow.isPrimitive(leftDesc);
boolean rightPrim = CodeFlow.isPrimitive(rightDesc);
cf.enterCompilationScope();
getLeftOperand().generateCode(mv, cf);
cf.exitCompilationScope();
if (leftPrim) {
CodeFlow.insertBoxIfNecessary(mv, leftDesc.charAt(0));
}
cf.enterCompilationScope();
getRightOperand().generateCode(mv, cf);
cf.exitCompilationScope();
if (rightPrim) {
CodeFlow.insertBoxIfNecessary(mv, rightDesc.charAt(0));
}
String operatorClassName = Operator.class.getName().replace('.', '/');
String evaluationContextClassName = EvaluationContext.class.getName().replace('.', '/');
mv.visitMethodInsn(INVOKESTATIC, operatorClassName, "equalityCheck",
"(L" + evaluationContextClassName + ";Ljava/lang/Object;Ljava/lang/Object;)Z", false);
cf.pushDescriptor("Z");
}
Example 14
| Source File: OpNE.java From java-technology-stack with MIT License | 5 votes |
|
@Override
public void generateCode(MethodVisitor mv, CodeFlow cf) {
cf.loadEvaluationContext(mv);
String leftDesc = getLeftOperand().exitTypeDescriptor;
String rightDesc = getRightOperand().exitTypeDescriptor;
boolean leftPrim = CodeFlow.isPrimitive(leftDesc);
boolean rightPrim = CodeFlow.isPrimitive(rightDesc);
cf.enterCompilationScope();
getLeftOperand().generateCode(mv, cf);
cf.exitCompilationScope();
if (leftPrim) {
CodeFlow.insertBoxIfNecessary(mv, leftDesc.charAt(0));
}
cf.enterCompilationScope();
getRightOperand().generateCode(mv, cf);
cf.exitCompilationScope();
if (rightPrim) {
CodeFlow.insertBoxIfNecessary(mv, rightDesc.charAt(0));
}
String operatorClassName = Operator.class.getName().replace('.', '/');
String evaluationContextClassName = EvaluationContext.class.getName().replace('.', '/');
mv.visitMethodInsn(INVOKESTATIC, operatorClassName, "equalityCheck",
"(L" + evaluationContextClassName + ";Ljava/lang/Object;Ljava/lang/Object;)Z", false);
// Invert the boolean
Label notZero = new Label();
Label end = new Label();
mv.visitJumpInsn(IFNE, notZero);
mv.visitInsn(ICONST_1);
mv.visitJumpInsn(GOTO, end);
mv.visitLabel(notZero);
mv.visitInsn(ICONST_0);
mv.visitLabel(end);
cf.pushDescriptor("Z");
}
Example 15
| Source File: OpEQ.java From lams with GNU General Public License v2.0 | 5 votes |
|
@Override
public void generateCode(MethodVisitor mv, CodeFlow cf) {
cf.loadEvaluationContext(mv);
String leftDesc = getLeftOperand().exitTypeDescriptor;
String rightDesc = getRightOperand().exitTypeDescriptor;
boolean leftPrim = CodeFlow.isPrimitive(leftDesc);
boolean rightPrim = CodeFlow.isPrimitive(rightDesc);
cf.enterCompilationScope();
getLeftOperand().generateCode(mv, cf);
cf.exitCompilationScope();
if (leftPrim) {
CodeFlow.insertBoxIfNecessary(mv, leftDesc.charAt(0));
}
cf.enterCompilationScope();
getRightOperand().generateCode(mv, cf);
cf.exitCompilationScope();
if (rightPrim) {
CodeFlow.insertBoxIfNecessary(mv, rightDesc.charAt(0));
}
String operatorClassName = Operator.class.getName().replace('.', '/');
String evaluationContextClassName = EvaluationContext.class.getName().replace('.', '/');
mv.visitMethodInsn(INVOKESTATIC, operatorClassName, "equalityCheck",
"(L" + evaluationContextClassName + ";Ljava/lang/Object;Ljava/lang/Object;)Z", false);
cf.pushDescriptor("Z");
}
Example 16
| Source File: OpEQ.java From java-technology-stack with MIT License | 5 votes |
|
@Override
public void generateCode(MethodVisitor mv, CodeFlow cf) {
cf.loadEvaluationContext(mv);
String leftDesc = getLeftOperand().exitTypeDescriptor;
String rightDesc = getRightOperand().exitTypeDescriptor;
boolean leftPrim = CodeFlow.isPrimitive(leftDesc);
boolean rightPrim = CodeFlow.isPrimitive(rightDesc);
cf.enterCompilationScope();
getLeftOperand().generateCode(mv, cf);
cf.exitCompilationScope();
if (leftPrim) {
CodeFlow.insertBoxIfNecessary(mv, leftDesc.charAt(0));
}
cf.enterCompilationScope();
getRightOperand().generateCode(mv, cf);
cf.exitCompilationScope();
if (rightPrim) {
CodeFlow.insertBoxIfNecessary(mv, rightDesc.charAt(0));
}
String operatorClassName = Operator.class.getName().replace('.', '/');
String evaluationContextClassName = EvaluationContext.class.getName().replace('.', '/');
mv.visitMethodInsn(INVOKESTATIC, operatorClassName, "equalityCheck",
"(L" + evaluationContextClassName + ";Ljava/lang/Object;Ljava/lang/Object;)Z", false);
cf.pushDescriptor("Z");
}
Example 17
| Source File: OpPlus.java From java-technology-stack with MIT License | 4 votes |
|
@Override
public void generateCode(MethodVisitor mv, CodeFlow cf) {
if ("Ljava/lang/String".equals(this.exitTypeDescriptor)) {
mv.visitTypeInsn(NEW, "java/lang/StringBuilder");
mv.visitInsn(DUP);
mv.visitMethodInsn(INVOKESPECIAL, "java/lang/StringBuilder", "<init>", "()V", false);
walk(mv, cf, getLeftOperand());
walk(mv, cf, getRightOperand());
mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/StringBuilder", "toString", "()Ljava/lang/String;", false);
}
else {
this.children[0].generateCode(mv, cf);
String leftDesc = this.children[0].exitTypeDescriptor;
String exitDesc = this.exitTypeDescriptor;
Assert.state(exitDesc != null, "No exit type descriptor");
char targetDesc = exitDesc.charAt(0);
CodeFlow.insertNumericUnboxOrPrimitiveTypeCoercion(mv, leftDesc, targetDesc);
if (this.children.length > 1) {
cf.enterCompilationScope();
this.children[1].generateCode(mv, cf);
String rightDesc = this.children[1].exitTypeDescriptor;
cf.exitCompilationScope();
CodeFlow.insertNumericUnboxOrPrimitiveTypeCoercion(mv, rightDesc, targetDesc);
switch (targetDesc) {
case 'I':
mv.visitInsn(IADD);
break;
case 'J':
mv.visitInsn(LADD);
break;
case 'F':
mv.visitInsn(FADD);
break;
case 'D':
mv.visitInsn(DADD);
break;
default:
throw new IllegalStateException(
"Unrecognized exit type descriptor: '" + this.exitTypeDescriptor + "'");
}
}
}
cf.pushDescriptor(this.exitTypeDescriptor);
}
Example 18
| Source File: OpNE.java From spring4-understanding with Apache License 2.0 | 4 votes |
|
@Override
public void generateCode(MethodVisitor mv, CodeFlow cf) {
String leftDesc = getLeftOperand().exitTypeDescriptor;
String rightDesc = getRightOperand().exitTypeDescriptor;
Label elseTarget = new Label();
Label endOfIf = new Label();
boolean leftPrim = CodeFlow.isPrimitive(leftDesc);
boolean rightPrim = CodeFlow.isPrimitive(rightDesc);
DescriptorComparison dc = DescriptorComparison.checkNumericCompatibility(leftDesc, rightDesc, leftActualDescriptor, rightActualDescriptor);
if (dc.areNumbers && dc.areCompatible) {
char targetType = dc.compatibleType;
getLeftOperand().generateCode(mv, cf);
if (!leftPrim) {
CodeFlow.insertUnboxInsns(mv, targetType, leftDesc);
}
cf.enterCompilationScope();
getRightOperand().generateCode(mv, cf);
cf.exitCompilationScope();
if (!rightPrim) {
CodeFlow.insertUnboxInsns(mv, targetType, rightDesc);
}
// assert: SpelCompiler.boxingCompatible(leftDesc, rightDesc)
if (targetType == 'D') {
mv.visitInsn(DCMPL);
mv.visitJumpInsn(IFEQ, elseTarget);
}
else if (targetType == 'F') {
mv.visitInsn(FCMPL);
mv.visitJumpInsn(IFEQ, elseTarget);
}
else if (targetType == 'J') {
mv.visitInsn(LCMP);
mv.visitJumpInsn(IFEQ, elseTarget);
}
else if (targetType == 'I' || targetType == 'Z') {
mv.visitJumpInsn(IF_ICMPEQ, elseTarget);
}
else {
throw new IllegalStateException("Unexpected descriptor "+leftDesc);
}
}
else {
getLeftOperand().generateCode(mv, cf);
getRightOperand().generateCode(mv, cf);
mv.visitJumpInsn(IF_ACMPEQ, elseTarget);
}
mv.visitInsn(ICONST_1);
mv.visitJumpInsn(GOTO,endOfIf);
mv.visitLabel(elseTarget);
mv.visitInsn(ICONST_0);
mv.visitLabel(endOfIf);
cf.pushDescriptor("Z");
}
Example 19
| Source File: Operator.java From java-technology-stack with MIT License | 4 votes |
|
/**
* Numeric comparison operators share very similar generated code, only differing in
* two comparison instructions.
*/
protected void generateComparisonCode(MethodVisitor mv, CodeFlow cf, int compInstruction1, int compInstruction2) {
SpelNodeImpl left = getLeftOperand();
SpelNodeImpl right = getRightOperand();
String leftDesc = left.exitTypeDescriptor;
String rightDesc = right.exitTypeDescriptor;
boolean unboxLeft = !CodeFlow.isPrimitive(leftDesc);
boolean unboxRight = !CodeFlow.isPrimitive(rightDesc);
DescriptorComparison dc = DescriptorComparison.checkNumericCompatibility(
leftDesc, rightDesc, this.leftActualDescriptor, this.rightActualDescriptor);
char targetType = dc.compatibleType; // CodeFlow.toPrimitiveTargetDesc(leftDesc);
cf.enterCompilationScope();
left.generateCode(mv, cf);
cf.exitCompilationScope();
if (unboxLeft) {
CodeFlow.insertUnboxInsns(mv, targetType, leftDesc);
}
cf.enterCompilationScope();
right.generateCode(mv, cf);
cf.exitCompilationScope();
if (unboxRight) {
CodeFlow.insertUnboxInsns(mv, targetType, rightDesc);
}
// assert: SpelCompiler.boxingCompatible(leftDesc, rightDesc)
Label elseTarget = new Label();
Label endOfIf = new Label();
if (targetType == 'D') {
mv.visitInsn(DCMPG);
mv.visitJumpInsn(compInstruction1, elseTarget);
}
else if (targetType == 'F') {
mv.visitInsn(FCMPG);
mv.visitJumpInsn(compInstruction1, elseTarget);
}
else if (targetType == 'J') {
mv.visitInsn(LCMP);
mv.visitJumpInsn(compInstruction1, elseTarget);
}
else if (targetType == 'I') {
mv.visitJumpInsn(compInstruction2, elseTarget);
}
else {
throw new IllegalStateException("Unexpected descriptor " + leftDesc);
}
// Other numbers are not yet supported (isCompilable will not have returned true)
mv.visitInsn(ICONST_1);
mv.visitJumpInsn(GOTO,endOfIf);
mv.visitLabel(elseTarget);
mv.visitInsn(ICONST_0);
mv.visitLabel(endOfIf);
cf.pushDescriptor("Z");
}
Example 20
| Source File: OpPlus.java From spring4-understanding with Apache License 2.0 | 4 votes |
|
@Override
public void generateCode(MethodVisitor mv, CodeFlow cf) {
if (this.exitTypeDescriptor == "Ljava/lang/String") {
mv.visitTypeInsn(NEW, "java/lang/StringBuilder");
mv.visitInsn(DUP);
mv.visitMethodInsn(INVOKESPECIAL, "java/lang/StringBuilder", "<init>", "()V", false);
walk(mv,cf,getLeftOperand());
walk(mv,cf,getRightOperand());
mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/StringBuilder", "toString", "()Ljava/lang/String;", false);
}
else {
getLeftOperand().generateCode(mv, cf);
String leftDesc = getLeftOperand().exitTypeDescriptor;
CodeFlow.insertNumericUnboxOrPrimitiveTypeCoercion(mv, leftDesc, this.exitTypeDescriptor.charAt(0));
if (this.children.length > 1) {
cf.enterCompilationScope();
getRightOperand().generateCode(mv, cf);
String rightDesc = getRightOperand().exitTypeDescriptor;
cf.exitCompilationScope();
CodeFlow.insertNumericUnboxOrPrimitiveTypeCoercion(mv, rightDesc, this.exitTypeDescriptor.charAt(0));
switch (this.exitTypeDescriptor.charAt(0)) {
case 'I':
mv.visitInsn(IADD);
break;
case 'J':
mv.visitInsn(LADD);
break;
case 'F':
mv.visitInsn(FADD);
break;
case 'D':
mv.visitInsn(DADD);
break;
default:
throw new IllegalStateException(
"Unrecognized exit type descriptor: '" + this.exitTypeDescriptor + "'");
}
}
}
cf.pushDescriptor(this.exitTypeDescriptor);
}
