public void generateStoreSaveValueIfNecessary(CodeStream codeStream) {
// push receiver
codeStream.aload_0();
// push the 2 parameters of "setResult(Object, Class)"
if (this.expression == null
|| this.expression.resolvedType
== TypeBinding
.VOID) { // expressionType == VoidBinding if code snippet is the expression
// "System.out.println()"
// push null
codeStream.aconst_null();
// void.class
codeStream.generateClassLiteralAccessForType(TypeBinding.VOID, null);
} else {
// swap with expression
int valueTypeID = this.expression.resolvedType.id;
if (valueTypeID == T_long || valueTypeID == T_double) {
codeStream.dup_x2();
codeStream.pop();
} else {
codeStream.swap();
}
// generate wrapper if needed
if (this.expression.resolvedType.isBaseType()
&& this.expression.resolvedType != TypeBinding.NULL) {
codeStream.generateBoxingConversion(this.expression.resolvedType.id);
}
// generate the expression type
codeStream.generateClassLiteralAccessForType(this.expression.resolvedType, null);
}
// generate the invoke virtual to "setResult(Object,Class)"
codeStream.invoke(
Opcodes.OPC_invokevirtual, this.setResultMethod, null /* default declaringClass */);
}
/**
* MessageSend code generation
*
* @param currentScope org.eclipse.jdt.internal.compiler.lookup.BlockScope
* @param codeStream org.eclipse.jdt.internal.compiler.codegen.CodeStream
* @param valueRequired boolean
*/
public void generateCode(BlockScope currentScope, CodeStream codeStream, boolean valueRequired) {
int pc = codeStream.position;
MethodBinding codegenBinding = this.binding.original();
if (codegenBinding.canBeSeenBy(this.actualReceiverType, this, currentScope)) {
// generate receiver/enclosing instance access
boolean isStatic = codegenBinding.isStatic();
// outer access ?
if (!isStatic && ((this.bits & DepthMASK) != 0)) {
// outer method can be reached through emulation
ReferenceBinding targetType =
currentScope
.enclosingSourceType()
.enclosingTypeAt((this.bits & DepthMASK) >> DepthSHIFT);
Object[] path =
currentScope.getEmulationPath(
targetType, true /*only exact match*/, false /*consider enclosing arg*/);
if (path == null) {
// emulation was not possible (should not happen per construction)
currentScope.problemReporter().needImplementation(this);
} else {
codeStream.generateOuterAccess(path, this, targetType, currentScope);
}
} else {
this.receiver.generateCode(currentScope, codeStream, !isStatic);
if ((this.bits & NeedReceiverGenericCast) != 0) {
codeStream.checkcast(this.actualReceiverType);
}
codeStream.recordPositionsFrom(pc, this.sourceStart);
}
// generate arguments
generateArguments(this.binding, this.arguments, currentScope, codeStream);
// actual message invocation
TypeBinding constantPoolDeclaringClass =
CodeStream.getConstantPoolDeclaringClass(
currentScope,
codegenBinding,
this.actualReceiverType,
this.receiver.isImplicitThis());
if (isStatic) {
codeStream.invoke(Opcodes.OPC_invokestatic, codegenBinding, constantPoolDeclaringClass);
} else if ((this.receiver.isSuper()) || codegenBinding.isPrivate()) {
codeStream.invoke(Opcodes.OPC_invokespecial, codegenBinding, constantPoolDeclaringClass);
} else {
if (constantPoolDeclaringClass.isInterface()) { // interface or annotation type
codeStream.invoke(
Opcodes.OPC_invokeinterface, codegenBinding, constantPoolDeclaringClass);
} else {
codeStream.invoke(Opcodes.OPC_invokevirtual, codegenBinding, constantPoolDeclaringClass);
}
}
} else {
codeStream.generateEmulationForMethod(currentScope, codegenBinding);
// generate receiver/enclosing instance access
boolean isStatic = codegenBinding.isStatic();
// outer access ?
if (!isStatic && ((this.bits & DepthMASK) != 0)) {
// not supported yet
currentScope.problemReporter().needImplementation(this);
} else {
this.receiver.generateCode(currentScope, codeStream, !isStatic);
if ((this.bits & NeedReceiverGenericCast) != 0) {
codeStream.checkcast(this.actualReceiverType);
}
codeStream.recordPositionsFrom(pc, this.sourceStart);
}
if (isStatic) {
// we need an object on the stack which is ignored for the method invocation
codeStream.aconst_null();
}
// generate arguments
if (this.arguments != null) {
int argsLength = this.arguments.length;
codeStream.generateInlinedValue(argsLength);
codeStream.newArray(
currentScope.createArrayType(
currentScope.getType(TypeConstants.JAVA_LANG_OBJECT, 3), 1));
codeStream.dup();
for (int i = 0; i < argsLength; i++) {
codeStream.generateInlinedValue(i);
this.arguments[i].generateCode(currentScope, codeStream, true);
TypeBinding parameterBinding = codegenBinding.parameters[i];
if (parameterBinding.isBaseType() && parameterBinding != TypeBinding.NULL) {
codeStream.generateBoxingConversion(codegenBinding.parameters[i].id);
}
codeStream.aastore();
if (i < argsLength - 1) {
codeStream.dup();
}
}
} else {
codeStream.generateInlinedValue(0);
codeStream.newArray(
currentScope.createArrayType(
currentScope.getType(TypeConstants.JAVA_LANG_OBJECT, 3), 1));
}
codeStream.invokeJavaLangReflectMethodInvoke();
// convert the return value to the appropriate type for primitive types
if (codegenBinding.returnType.isBaseType()) {
int typeID = codegenBinding.returnType.id;
if (typeID == T_void) {
// remove the null from the stack
codeStream.pop();
}
codeStream.checkcast(typeID);
codeStream.getBaseTypeValue(typeID);
} else {
codeStream.checkcast(codegenBinding.returnType);
}
}
// required cast must occur even if no value is required
if (this.valueCast != null) codeStream.checkcast(this.valueCast);
if (valueRequired) {
// implicit conversion if necessary
codeStream.generateImplicitConversion(this.implicitConversion);
} else {
boolean isUnboxing = (this.implicitConversion & TypeIds.UNBOXING) != 0;
// conversion only generated if unboxing
if (isUnboxing) codeStream.generateImplicitConversion(this.implicitConversion);
switch (isUnboxing ? postConversionType(currentScope).id : codegenBinding.returnType.id) {
case T_long:
case T_double:
codeStream.pop2();
break;
case T_void:
break;
default:
codeStream.pop();
}
}
codeStream.recordPositionsFrom(
pc, (int) (this.nameSourcePosition >>> 32)); // highlight selector
}