/*
* 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.xpath.expr;
import java.io.IOException;
import org.openrosa.client.java.io.DataInputStream;
import org.openrosa.client.java.io.DataOutputStream;
import org.openrosa.client.jr.core.model.condition.EvaluationContext;
import org.openrosa.client.jr.core.model.instance.FormInstance;
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 XPathNumericLiteral extends XPathExpression {
public double d;
public XPathNumericLiteral () { } //for deserialization
public XPathNumericLiteral (Double d) {
this.d = d.doubleValue();
}
public Object eval (FormInstance model, EvaluationContext evalContext) {
return new Double(d);
}
public String toString () {
return "{num:" + Double.toString(d) + "}";
}
public boolean equals (Object o) {
if (o instanceof XPathNumericLiteral) {
XPathNumericLiteral x = (XPathNumericLiteral)o;
return (Double.isNaN(d) ? Double.isNaN(x.d) : d == x.d);
} else {
return false;
}
}
public void readExternal(DataInputStream in, PrototypeFactory pf) throws IOException, DeserializationException {
if (in.readByte() == (byte)0x00) {
d = ExtUtil.readNumeric(in);
} else {
d = ExtUtil.readDecimal(in);
}
}
public void writeExternal(DataOutputStream out) throws IOException {
if (d == (int)d) {
out.writeByte(0x00);
ExtUtil.writeNumeric(out, (int)d);
} else {
out.writeByte(0x01);
ExtUtil.writeDecimal(out, d);
}
}
}