Java Code Examples for org.springframework.expression.spel.CodeFlow#insertUnboxInsns()
The following examples show how to use
org.springframework.expression.spel.CodeFlow#insertUnboxInsns() .
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Example 1
| 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 2
| Source File: SpelNodeImpl.java From java-technology-stack 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 3
| 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 4
| Source File: SpelNodeImpl.java From spring4-understanding with Apache License 2.0 | 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);
boolean primitiveOnStack = CodeFlow.isPrimitive(cf.lastDescriptor());
// Check if need to box it for the method reference?
if (primitiveOnStack && paramDesc.charAt(0) == 'L') {
CodeFlow.insertBoxIfNecessary(mv, cf.lastDescriptor().charAt(0));
}
else if (paramDesc.length() == 1 && !primitiveOnStack) {
CodeFlow.insertUnboxInsns(mv, paramDesc.charAt(0), cf.lastDescriptor());
}
else if (!cf.lastDescriptor().equals(paramDesc)) {
// 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 5
| Source File: Ternary.java From spring-analysis-note 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 6
| 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 7
| Source File: Ternary.java From lams with GNU General Public License v2.0 | 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);
if (!CodeFlow.isPrimitive(cf.lastDescriptor())) {
CodeFlow.insertUnboxInsns(mv, 'Z', cf.lastDescriptor());
}
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)) {
CodeFlow.insertBoxIfNecessary(mv, cf.lastDescriptor().charAt(0));
}
cf.exitCompilationScope();
mv.visitJumpInsn(GOTO, endOfIf);
mv.visitLabel(elseTarget);
cf.enterCompilationScope();
this.children[2].generateCode(mv, cf);
if (!CodeFlow.isPrimitive(this.exitTypeDescriptor)) {
CodeFlow.insertBoxIfNecessary(mv, cf.lastDescriptor().charAt(0));
}
cf.exitCompilationScope();
mv.visitLabel(endOfIf);
cf.pushDescriptor(this.exitTypeDescriptor);
}
Example 8
| Source File: Ternary.java From spring4-understanding with Apache License 2.0 | 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);
if (!CodeFlow.isPrimitive(cf.lastDescriptor())) {
CodeFlow.insertUnboxInsns(mv, 'Z', cf.lastDescriptor());
}
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)) {
CodeFlow.insertBoxIfNecessary(mv, cf.lastDescriptor().charAt(0));
}
cf.exitCompilationScope();
mv.visitJumpInsn(GOTO, endOfIf);
mv.visitLabel(elseTarget);
cf.enterCompilationScope();
this.children[2].generateCode(mv, cf);
if (!CodeFlow.isPrimitive(this.exitTypeDescriptor)) {
CodeFlow.insertBoxIfNecessary(mv, cf.lastDescriptor().charAt(0));
}
cf.exitCompilationScope();
mv.visitLabel(endOfIf);
cf.pushDescriptor(this.exitTypeDescriptor);
}
Example 9
| 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 10
| Source File: Operator.java From lams with GNU General Public License v2.0 | 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) {
String leftDesc = getLeftOperand().exitTypeDescriptor;
String rightDesc = getRightOperand().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();
getLeftOperand().generateCode(mv, cf);
cf.exitCompilationScope();
if (unboxLeft) {
CodeFlow.insertUnboxInsns(mv, targetType, leftDesc);
}
cf.enterCompilationScope();
getRightOperand().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 11
| 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 12
| Source File: Operator.java From spring4-understanding with Apache License 2.0 | 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) {
String leftDesc = getLeftOperand().exitTypeDescriptor;
String rightDesc = getRightOperand().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);
getLeftOperand().generateCode(mv, cf);
if (unboxLeft) {
CodeFlow.insertUnboxInsns(mv, targetType, leftDesc);
}
cf.enterCompilationScope();
getRightOperand().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 13
| Source File: OpEQ.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,
this.leftActualDescriptor, this.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(IFNE, elseTarget);
}
else if (targetType=='F') {
mv.visitInsn(FCMPL);
mv.visitJumpInsn(IFNE, elseTarget);
}
else if (targetType=='J') {
mv.visitInsn(LCMP);
mv.visitJumpInsn(IFNE, elseTarget);
}
else if (targetType=='I' || targetType=='Z') {
mv.visitJumpInsn(IF_ICMPNE, elseTarget);
}
else {
throw new IllegalStateException("Unexpected descriptor "+leftDesc);
}
}
else {
getLeftOperand().generateCode(mv, cf);
if (leftPrim) {
CodeFlow.insertBoxIfNecessary(mv, leftDesc.charAt(0));
}
getRightOperand().generateCode(mv, cf);
if (rightPrim) {
CodeFlow.insertBoxIfNecessary(mv, rightDesc.charAt(0));
}
Label leftNotNull = new Label();
mv.visitInsn(DUP_X1); // Dup right on the top of the stack
mv.visitJumpInsn(IFNONNULL,leftNotNull);
// Right is null!
mv.visitInsn(SWAP);
mv.visitInsn(POP); // remove it
Label rightNotNull = new Label();
mv.visitJumpInsn(IFNONNULL, rightNotNull);
// Left is null too
mv.visitInsn(ICONST_1);
mv.visitJumpInsn(GOTO, endOfIf);
mv.visitLabel(rightNotNull);
mv.visitInsn(ICONST_0);
mv.visitJumpInsn(GOTO,endOfIf);
mv.visitLabel(leftNotNull);
mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/Object", "equals", "(Ljava/lang/Object;)Z", false);
mv.visitLabel(endOfIf);
cf.pushDescriptor("Z");
return;
}
mv.visitInsn(ICONST_1);
mv.visitJumpInsn(GOTO,endOfIf);
mv.visitLabel(elseTarget);
mv.visitInsn(ICONST_0);
mv.visitLabel(endOfIf);
cf.pushDescriptor("Z");
}
