ReturnEventInfo.java
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package com.mumfrey.liteloader.transformers.event;
import org.objectweb.asm.Type;
import com.mumfrey.liteloader.core.event.EventCancellationException;
/**
* EventInfo for events which have a return type
*
* @author Adam Mummery-Smith
*
* @param <S> Source object type. For non-static methods this will be the containing object instance.
* @param <R> Return type
*/
public class ReturnEventInfo<S, R> extends EventInfo<S>
{
private R returnValue;
public ReturnEventInfo(String name, S source, boolean cancellable)
{
super(name, source, cancellable);
this.returnValue = null;
}
public ReturnEventInfo(String name, S source, boolean cancellable, R returnValue)
{
super(name, source, cancellable);
this.returnValue = returnValue;
}
@SuppressWarnings("unchecked")
public ReturnEventInfo(String name, S source, boolean cancellable, byte returnValue)
{
super(name, source, cancellable);
this.returnValue = (R)Byte.valueOf(returnValue);
}
@SuppressWarnings("unchecked")
public ReturnEventInfo(String name, S source, boolean cancellable, char returnValue)
{
super(name, source, cancellable);
this.returnValue = (R)Character.valueOf(returnValue);
}
@SuppressWarnings("unchecked")
public ReturnEventInfo(String name, S source, boolean cancellable, double returnValue)
{
super(name, source, cancellable);
this.returnValue = (R)Double.valueOf(returnValue);
}
@SuppressWarnings("unchecked")
public ReturnEventInfo(String name, S source, boolean cancellable, float returnValue)
{
super(name, source, cancellable);
this.returnValue = (R)Float.valueOf(returnValue);
}
@SuppressWarnings("unchecked")
public ReturnEventInfo(String name, S source, boolean cancellable, int returnValue)
{
super(name, source, cancellable);
this.returnValue = (R)Integer.valueOf(returnValue);
}
@SuppressWarnings("unchecked")
public ReturnEventInfo(String name, S source, boolean cancellable, long returnValue)
{
super(name, source, cancellable);
this.returnValue = (R)Long.valueOf(returnValue);
}
@SuppressWarnings("unchecked")
public ReturnEventInfo(String name, S source, boolean cancellable, short returnValue)
{
super(name, source, cancellable);
this.returnValue = (R)Short.valueOf(returnValue);
}
@SuppressWarnings("unchecked")
public ReturnEventInfo(String name, S source, boolean cancellable, boolean returnValue)
{
super(name, source, cancellable);
this.returnValue = (R)Boolean.valueOf(returnValue);
}
/**
* Sets a return value for this event and cancels the event (required in order to return the new value)
*
* @param returnValue
*/
public void setReturnValue(R returnValue) throws EventCancellationException
{
super.cancel();
this.returnValue = returnValue;
}
public R getReturnValue()
{
return this.returnValue;
}
// All of the accessors below are to avoid having to generate unboxing conversions in bytecode
public byte getReturnValueB() { if (this.returnValue == null) return 0; return (Byte) this.returnValue; }
public char getReturnValueC() { if (this.returnValue == null) return 0; return (Character)this.returnValue; }
public double getReturnValueD() { if (this.returnValue == null) return 0.0; return (Double) this.returnValue; }
public float getReturnValueF() { if (this.returnValue == null) return 0.0F; return (Float) this.returnValue; }
public int getReturnValueI() { if (this.returnValue == null) return 0; return (Integer) this.returnValue; }
public long getReturnValueJ() { if (this.returnValue == null) return 0; return (Long) this.returnValue; }
public short getReturnValueS() { if (this.returnValue == null) return 0; return (Short) this.returnValue; }
public boolean getReturnValueZ() { if (this.returnValue == null) return false; return (Boolean) this.returnValue; }
public static String getReturnAccessor(Type returnType)
{
if (returnType.getSort() == Type.OBJECT)
{
return "getReturnValue";
}
return String.format("getReturnValue%s", returnType.getDescriptor());
}
public static String getReturnDescriptor(Type returnType)
{
if (returnType.getSort() == Type.OBJECT)
{
return String.format("()%s", EventInfo.OBJECT);
}
return String.format("()%s", returnType.getDescriptor());
}
}