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/**
* Copyright (c) 2014, University of Warsaw
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification, are permitted
* provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this list of
* conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice, this list of
* conditions and the following disclaimer in the documentation and/or other materials provided
* with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY
* WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package pl.edu.mimuw.cloudatlas.model;
import java.text.ParseException;
import pl.edu.mimuw.cloudatlas.model.Value;
import pl.edu.mimuw.cloudatlas.model.ValueString;
/**
* A class that wraps a Java <code>String</code> object.
*/
public class ValueString extends ValueSimple<String> {
/**
* Result of converting values representing null to <code>ValueString</code>.
*/
protected static final ValueString NULL_STRING = new ValueString("NULL");
/**
* Constructs a new <code>ValueString</code> object wrapping the specified <code>value</code>.
*
* @param value the value to wrap
*/
public ValueString(String value) {
super(value);
}
/* Kryo needs a no-args constructor */
private ValueString() {
}
@Override
public Type getType() {
return TypePrimitive.STRING;
}
@Override
public Value getDefaultValue() {
return new ValueString("");
}
@Override
public ValueBoolean isLowerThan(Value value) {
sameTypesOrThrow(value, Operation.COMPARE);
if(isNull() || value.isNull())
return new ValueBoolean(null);
return new ValueBoolean(getValue().compareTo(((ValueString)value).getValue()) < 0);
}
@Override
public ValueString addValue(Value value) {
sameTypesOrThrow(value, Operation.ADD);
if(isNull() || value.isNull())
return new ValueString(null);
return new ValueString(getValue().concat(((ValueString)value).getValue()));
}
@Override
public ValueBoolean regExpr(Value value) {
sameTypesOrThrow(value, Operation.REG_EXPR);
if(isNull() || value.isNull())
return new ValueBoolean(null);
return new ValueBoolean(getValue().matches(((ValueString)value).getValue()));
}
@Override
public Value convertTo(Type type) {
switch(type.getPrimaryType()) {
case BOOLEAN:
return new ValueBoolean(Boolean.parseBoolean(getValue()));
case DOUBLE:
try {
return new ValueDouble(Double.parseDouble(getValue()));
} catch(NumberFormatException exception) {
return new ValueDouble(null);
}
case DURATION:
return new ValueDuration(getValue());
case INT:
try {
return new ValueInt(Long.parseLong(getValue()));
} catch(NumberFormatException exception) {
return new ValueInt(null);
}
case STRING:
return getValue() == null? ValueString.NULL_STRING : this;
case TIME:
try {
return new ValueTime(getValue());
} catch(ParseException exception) {
return new ValueTime((Long)null);
}
default:
throw new UnsupportedConversionException(getType(), type);
}
}
@Override
public ValueInt valueSize() {
return new ValueInt(getValue() == null? null : (long)getValue().length());
}
}
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