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/*
* Copyright (c) 2015 EXILANT Technologies Private Limited (www.exilant.com)
* Copyright (c) 2016 simplity.org
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
package org.simplity.tp;
import org.simplity.kernel.ApplicationError;
import org.simplity.kernel.Tracer;
import org.simplity.kernel.db.DbAccessType;
import org.simplity.kernel.expr.Expression;
import org.simplity.kernel.expr.InvalidOperationException;
import org.simplity.kernel.util.TextUtil;
import org.simplity.kernel.value.Value;
import org.simplity.service.ServiceContext;
/**
* simply set value for a field
*
*
* @author simplity.org
*
*/
public class SetValue extends Action {
/**
* field name
*/
String fieldName;
/**
* value, if it is known at design time, or a single field, like 23 or
* $customerName
*/
String fieldValue;
/**
* if value is more complex..
*/
Expression expression;
/*
* parsed and cached value
*/
private Value parsedValue;
/*
* if fieldValue is a field, then we keep that parsed name
*/
private String parsedField;
@Override
protected Value doAct(ServiceContext ctx) {
Value value = null;
if (this.parsedValue != null) {
value = this.parsedValue;
} else if (this.parsedField != null) {
value = ctx.getValue(this.parsedField);
} else if (this.expression != null) {
try {
value = this.expression.evaluate(ctx);
} catch (InvalidOperationException e) {
throw new ApplicationError("Expression = "
+ this.expression.toString()
+ "\n error while evaluating : " + e.getMessage());
}
} else {
Tracer.trace("Field " + this.fieldName + " is removed from context");
}
ctx.setValue(this.fieldName, value);
return value;
}
@Override
public DbAccessType getDataAccessType() {
return DbAccessType.NONE;
}
/*
* (non-Javadoc)
*
* @see org.simplity.tp.Action#getReady()
*/
@Override
public void getReady(int idx, Service service) {
super.getReady(idx, service);
if (this.fieldValue != null) {
if (this.expression != null) {
throw new ApplicationError(
"SetValue action '"
+ this.actionName
+ "' has confused me by specifying both expression and fieldValue. Only one of this should be specified ");
}
this.parsedField = TextUtil.getFieldName(this.fieldValue);
if (this.parsedField == null) {
this.parsedValue = Value.parseValue(this.fieldValue);
if (this.parsedValue == null) {
throw new ApplicationError("SetValue action "
+ this.actionName + " has an invalid fieldValue="
+ this.fieldValue);
}
}
}
}
}