/*
* Copyright (C) 2009 JavaRosa
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not
* use this file except in compliance with the License. You may obtain a copy of
* the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations under
* the License.
*/
package org.openrosa.client.jr.core.model.condition;
import java.io.IOException;
import java.util.Vector;
import org.openrosa.client.java.io.DataInputStream;
import org.openrosa.client.java.io.DataOutputStream;
import org.openrosa.client.jr.core.model.FormDef;
import org.openrosa.client.jr.core.model.instance.FormInstance;
import org.openrosa.client.jr.core.model.instance.TreeElement;
import org.openrosa.client.jr.core.model.instance.TreeReference;
import org.openrosa.client.jr.core.util.externalizable.DeserializationException;
import org.openrosa.client.jr.core.util.externalizable.ExtUtil;
import org.openrosa.client.jr.core.util.externalizable.PrototypeFactory;
public class Condition extends Triggerable {
public static final int ACTION_NULL = 0;
public static final int ACTION_SHOW = 1;
public static final int ACTION_HIDE = 2;
public static final int ACTION_ENABLE = 3;
public static final int ACTION_DISABLE = 4;
public static final int ACTION_LOCK = 5;
public static final int ACTION_UNLOCK = 6;
public static final int ACTION_REQUIRE = 7;
public static final int ACTION_DONT_REQUIRE = 8;
public int trueAction;
public int falseAction;
public Condition () {
}
public Condition (IConditionExpr expr, int trueAction, int falseAction, TreeReference contextRef) {
this(expr, trueAction, falseAction, contextRef, new Vector());
}
public Condition (IConditionExpr expr, int trueAction, int falseAction, TreeReference contextRef, Vector targets) {
super(expr, contextRef);
this.trueAction = trueAction;
this.falseAction = falseAction;
this.targets = targets;
}
public Object eval (FormInstance model, EvaluationContext evalContext) {
return new Boolean(expr.eval(model, evalContext));
}
public boolean evalBool (FormInstance model, EvaluationContext evalContext) {
return ((Boolean)eval(model, evalContext)).booleanValue();
}
public void apply (TreeReference ref, Object rawResult, FormInstance model, FormDef f) {
boolean result = ((Boolean)rawResult).booleanValue();
performAction(model.resolveReference(ref), result ? trueAction : falseAction);
}
public boolean canCascade () {
return (trueAction == ACTION_SHOW || trueAction == ACTION_HIDE);
}
private void performAction (TreeElement node, int action) {
switch (action) {
case ACTION_NULL: break;
case ACTION_SHOW: node.setRelevant(true); break;
case ACTION_HIDE: node.setRelevant(false); break;
case ACTION_ENABLE: node.setEnabled(true); break;
case ACTION_DISABLE: node.setEnabled(false); break;
case ACTION_LOCK: /* not supported */; break;
case ACTION_UNLOCK: /* not supported */; break;
case ACTION_REQUIRE: node.setRequired(true); break;
case ACTION_DONT_REQUIRE: node.setRequired(false); break;
}
}
//conditions are equal if they have the same actions, expression, and triggers, but NOT targets or context ref
public boolean equals (Object o) {
if (o instanceof Condition) {
Condition c = (Condition)o;
if (this == c)
return true;
return (this.trueAction == c.trueAction && this.falseAction == c.falseAction && super.equals(c));
} else {
return false;
}
}
public void readExternal(DataInputStream in, PrototypeFactory pf) throws IOException, DeserializationException {
super.readExternal(in, pf);
trueAction = ExtUtil.readInt(in);
falseAction = ExtUtil.readInt(in);
}
public void writeExternal(DataOutputStream out) throws IOException {
super.writeExternal(out);
ExtUtil.writeNumeric(out, trueAction);
ExtUtil.writeNumeric(out, falseAction);
}
}