/*
* Copyright (C) 2012 Jason Gedge <http://www.gedge.ca>
*
* This file is part of the OpGraph project.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package ca.gedge.opgraph.nodes.general;
import ca.gedge.opgraph.OpContext;
import ca.gedge.opgraph.OpNode;
import ca.gedge.opgraph.OpNodeInfo;
import ca.gedge.opgraph.OutputField;
/**
* A node that outputs a constant value.
*/
@OpNodeInfo(
name="Constant Value",
description="Outputs a constant value.",
category="Data Generation"
)
public class ConstantValueNode extends OpNode {
/** Output field for the constant value */
public final OutputField VALUE_OUTPUT_FIELD = new OutputField("value", "Constant value", true, Object.class);
/** The value of this node */
private Object value;
/**
* Constructs a constant value node with a <code>null</code> value.
*/
public ConstantValueNode() {
this(null);
}
/**
* Constructs a constant value node with the specified value.
*
* @param value the constant value
*/
public ConstantValueNode(Object value) {
putField(VALUE_OUTPUT_FIELD);
this.value = value;
}
/**
* Sets the value in this node.
*
* @param value the value
*/
public void setValue(Object value) {
this.value = value;
VALUE_OUTPUT_FIELD.setOutputType(value == null ? Object.class : value.getClass());
}
//
// Overrides
//
@Override
public void operate(OpContext context) {
context.put(VALUE_OUTPUT_FIELD, value);
}
}