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* The Universal Permissive License (UPL), Version 1.0
*
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* (a) the Software, and
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* (b) any piece of software and/or hardware listed in the lrgrwrks.txt file if
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* Software and the Larger Work(s), and to sublicense the foregoing rights on
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* This license is subject to the following condition:
*
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package org.graalvm.wasm.api;
import com.oracle.truffle.api.interop.InteropLibrary;
import com.oracle.truffle.api.interop.UnknownIdentifierException;
import com.oracle.truffle.api.library.ExportLibrary;
import com.oracle.truffle.api.library.ExportMessage;
import org.graalvm.wasm.exception.WasmJsApiException;
@ExportLibrary(InteropLibrary.class)
public class Global extends Dictionary {
private final ValueType valueType;
private final boolean mutable;
private Object value;
public Global(String valueType, boolean mutable, Object value) {
this.valueType = ValueType.valueOf(valueType);
this.mutable = mutable;
setInternal(value);
addMembers(new Object[]{
"descriptor", new GlobalDescriptor(valueType, mutable),
"valueOf", new Executable(args -> get())
});
}
public Object get() {
return value;
}
public ValueType valueType() {
return valueType;
}
public boolean mutable() {
return mutable;
}
public void set(Object value) {
if (!mutable) {
throw new WasmJsApiException(WasmJsApiException.Kind.TypeError, "Global is not mutable.");
}
setInternal(value);
}
private void setInternal(Object value) {
switch (valueType) {
case i32:
if (!(value instanceof Integer)) {
throw new WasmJsApiException(WasmJsApiException.Kind.TypeError, "Global type " + valueType + ", value: " + value);
}
this.value = value;
break;
case i64:
if (!(value instanceof Long)) {
throw new WasmJsApiException(WasmJsApiException.Kind.TypeError, "Global type " + valueType + ", value: " + value);
}
this.value = value;
break;
case f32:
if (!(value instanceof Float)) {
throw new WasmJsApiException(WasmJsApiException.Kind.TypeError, "Global type " + valueType + ", value: " + value);
}
this.value = value;
break;
case f64:
if (!(value instanceof Double)) {
throw new WasmJsApiException(WasmJsApiException.Kind.TypeError, "Global type " + valueType + ", value: " + value);
}
this.value = value;
break;
}
}
@ExportMessage
@Override
public boolean isMemberReadable(String member) {
return "value".equals(member) || super.isMemberReadable(member);
}
@ExportMessage
public boolean isMemberModifiable(String member) {
return "value".equals(member);
}
@SuppressWarnings({"unused"})
@ExportMessage
public boolean isMemberInsertable(String member) {
return false;
}
@ExportMessage
@Override
public Object readMember(String member) throws UnknownIdentifierException {
if ("value".equals(member)) {
return get();
} else {
return super.readMember(member);
}
}
@ExportMessage
public void writeMember(String member, Object newValue) throws UnknownIdentifierException {
if ("value".equals(member)) {
set(newValue);
} else {
throw unknown(member);
}
}
}