/** * 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(); }
@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"); }
/** * 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, @Nullable SpelNodeImpl operand) { if (operand instanceof OpPlus) { OpPlus plus = (OpPlus)operand; walk(mv, cf, plus.getLeftOperand()); walk(mv, cf, plus.getRightOperand()); } else if (operand != null) { 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); } }
/** * 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(); }
cf.enterCompilationScope(); index.generateCode(mv, cf); cf.exitCompilationScope(); mv.visitInsn(insn); cf.enterCompilationScope(); this.children[0].generateCode(mv, cf); cf.exitCompilationScope(); mv.visitMethodInsn(INVOKEINTERFACE, "java/util/List", "get", "(I)Ljava/lang/Object;", true); cf.enterCompilationScope(); this.children[0].generateCode(mv, cf); cf.exitCompilationScope();
CodeFlow.insertUnboxInsns(mv, 'Z', lastDesc); cf.exitCompilationScope(); Label elseTarget = new Label(); Label endOfIf = new Label(); CodeFlow.insertBoxIfNecessary(mv, lastDesc.charAt(0)); cf.exitCompilationScope(); mv.visitJumpInsn(GOTO, endOfIf); mv.visitLabel(elseTarget); CodeFlow.insertBoxIfNecessary(mv, lastDesc.charAt(0)); cf.exitCompilationScope(); mv.visitLabel(endOfIf); cf.pushDescriptor(this.exitTypeDescriptor);
cf.exitCompilationScope(); if (leftPrim) { CodeFlow.insertBoxIfNecessary(mv, leftDesc.charAt(0)); cf.exitCompilationScope(); if (rightPrim) { CodeFlow.insertBoxIfNecessary(mv, rightDesc.charAt(0));
getRightOperand().generateCode(mv, cf); String rightDesc = getRightOperand().exitTypeDescriptor; cf.exitCompilationScope(); CodeFlow.insertNumericUnboxOrPrimitiveTypeCoercion(mv, rightDesc, targetDesc); switch (targetDesc) {
Assert.state(lastDesc != null, "No last descriptor"); CodeFlow.insertBoxIfNecessary(mv, lastDesc.charAt(0)); cf.exitCompilationScope(); Label elseTarget = new Label(); Label endOfIf = new Label(); CodeFlow.insertBoxIfNecessary(mv, lastDesc.charAt(0)); cf.exitCompilationScope(); mv.visitLabel(endOfIf); cf.pushDescriptor(this.exitTypeDescriptor);
getRightOperand().generateCode(mv, cf); String rightDesc = getRightOperand().exitTypeDescriptor; cf.exitCompilationScope(); CodeFlow.insertNumericUnboxOrPrimitiveTypeCoercion(mv, rightDesc, targetDesc); switch (targetDesc) {
getRightOperand().generateCode(mv, cf); String rightDesc = getRightOperand().exitTypeDescriptor; cf.exitCompilationScope(); CodeFlow.insertNumericUnboxOrPrimitiveTypeCoercion(mv, rightDesc, targetDesc); switch (targetDesc) {
@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); }
@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"); }
@Override public void generateCode(MethodVisitor mv, CodeFlow cf) { // pseudo: if (leftOperandValue) { result=true; } else { result=rightOperandValue; } Label elseTarget = new Label(); Label endOfIf = new Label(); cf.enterCompilationScope(); getLeftOperand().generateCode(mv, cf); cf.unboxBooleanIfNecessary(mv); cf.exitCompilationScope(); mv.visitJumpInsn(IFEQ, elseTarget); mv.visitLdcInsn(1); // TRUE 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); }
this.children[1].generateCode(mv, cf); String rightDesc = this.children[1].exitTypeDescriptor; cf.exitCompilationScope(); CodeFlow.insertNumericUnboxOrPrimitiveTypeCoercion(mv, rightDesc, targetDesc); switch (targetDesc) {
getRightOperand().generateCode(mv, cf); String rightDesc = getRightOperand().exitTypeDescriptor; cf.exitCompilationScope(); CodeFlow.insertNumericUnboxOrPrimitiveTypeCoercion(mv, rightDesc, targetDesc); switch (targetDesc) {
/** * 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, @Nullable SpelNodeImpl operand) { if (operand instanceof OpPlus) { OpPlus plus = (OpPlus)operand; walk(mv, cf, plus.getLeftOperand()); walk(mv, cf, plus.getRightOperand()); } else if (operand != null) { 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); } }
cf.exitCompilationScope(); if (unboxLeft) { CodeFlow.insertUnboxInsns(mv, targetType, leftDesc); cf.exitCompilationScope(); if (unboxRight) { CodeFlow.insertUnboxInsns(mv, targetType, rightDesc);
@Override public void generateCode(MethodVisitor mv, CodeFlow cf) { // pseudo: if (leftOperandValue) { result=true; } else { result=rightOperandValue; } Label elseTarget = new Label(); Label endOfIf = new Label(); cf.enterCompilationScope(); getLeftOperand().generateCode(mv, cf); cf.unboxBooleanIfNecessary(mv); cf.exitCompilationScope(); mv.visitJumpInsn(IFEQ, elseTarget); mv.visitLdcInsn(1); // TRUE 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); }
@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); }