org.eclipse.viatra2.core2/src/org/eclipse/viatra2/buffers/FlushBuffer.java

/*******************************************************************************
 * Copyright (c) 2004-2008 Andras Schmidt, Andras Balogh, Istvan Rath and Daniel Varro
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *    Andras Schmidt, Andras Balogh, Istvan Rath - initial API and implementation
 *******************************************************************************/

package org.eclipse.viatra2.buffers;

import java.io.IOException;
import java.io.Writer;
import java.net.URISyntaxException;

import org.eclipse.viatra2.core.IModelSpace;
import org.eclipse.viatra2.errors.VPMRuntimeException;
import org.eclipse.viatra2.natives.ASMNativeFunction;
import org.eclipse.viatra2.natives.NativeFunctionParameter;
import org.eclipse.viatra2.natives.VIATRANativeFunction;

@VIATRANativeFunction(name = "flushBuffer", remark = "Flushes an output buffer.", 
		returns = { NativeFunctionParameter.ParameterType.BOOLEAN }, 
		params = { @NativeFunctionParameter(
				description = "Uniquely identifies an output buffer.", 
				name = "bufferURI", 
				type = { NativeFunctionParameter.ParameterType.STRING }) })
public class FlushBuffer implements ASMNativeFunction {

	public Object evaluate(IModelSpace msp, Object[] params)
			throws VPMRuntimeException {
		try {
			Writer w = BufferStore.getBuffer(msp, params[0].toString());
			w.flush();
			return Boolean.TRUE;
		} catch (URISyntaxException e) {
			throw new VPMRuntimeException("Invalid URI syntax", e);
		} catch (IOException e) {
			throw new VPMRuntimeException("Error while flushing buffer", e);
		}
	}

	public String getDescription() {
		return "Flushes an output buffer";
	}

	public String getID() {
		return this.getClass().getCanonicalName();
	}

	public String getName() {
		return "flushBuffer"; // VTCL
	}

}