org.nakedobjects.metamodel.value.DoubleValueSemanticsProviderAbstract Maven / Gradle / Ivy
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package org.nakedobjects.metamodel.value;
import java.text.DecimalFormat;
import java.text.NumberFormat;
import java.text.ParseException;
import org.nakedobjects.metamodel.adapter.NakedObject;
import org.nakedobjects.metamodel.adapter.TextEntryParseException;
import org.nakedobjects.metamodel.config.NakedObjectConfiguration;
import org.nakedobjects.metamodel.facets.Facet;
import org.nakedobjects.metamodel.facets.FacetHolder;
import org.nakedobjects.metamodel.facets.value.DoubleFloatingPointValueFacet;
import org.nakedobjects.metamodel.runtimecontext.RuntimeContext;
import org.nakedobjects.metamodel.specloader.SpecificationLoader;
public abstract class DoubleValueSemanticsProviderAbstract extends ValueSemanticsProviderAbstract implements
DoubleFloatingPointValueFacet {
private static Class type() {
return DoubleFloatingPointValueFacet.class;
}
private static final int TYPICAL_LENGTH = 22;
private static final boolean IMMUTABLE = true;
private static final boolean EQUAL_BY_CONTENT = true;
private final NumberFormat format;
public DoubleValueSemanticsProviderAbstract(
final FacetHolder holder, final Class adaptedClass, final Object defaultValue,
final NakedObjectConfiguration configuration,
final SpecificationLoader specificationLoader,
final RuntimeContext runtimeContext) {
super(type(), holder, adaptedClass, TYPICAL_LENGTH, IMMUTABLE, EQUAL_BY_CONTENT, defaultValue, configuration, specificationLoader, runtimeContext);
format = determineNumberFormat("value.format.double");
}
// //////////////////////////////////////////////////////////////////
// Parser
// //////////////////////////////////////////////////////////////////
@Override
protected Object doParse(final Object original, final String entry) {
try {
return new Double(format.parse(entry).doubleValue());
} catch (final ParseException e) {
throw new TextEntryParseException("Not floating point number " + entry, e);
}
}
// ///////////////////////////////////////////////////////////////////////////
// TitleProvider
// ///////////////////////////////////////////////////////////////////////////
@Override
public String titleString(final Object value) {
return titleString(format, value);
}
public String titleWithMask(final String mask, final Object value) {
return titleString(new DecimalFormat(mask), value);
}
// //////////////////////////////////////////////////////////////////
// EncoderDecoder
// //////////////////////////////////////////////////////////////////
@Override
protected String doEncode(final Object object) {
return object.toString();
}
@Override
protected Object doRestore(final String data) {
return new Double(data);
}
// //////////////////////////////////////////////////////////////////
// DoubleValueFacet
// //////////////////////////////////////////////////////////////////
public Double doubleValue(final NakedObject object) {
return (Double) (object == null ? null : object.getObject());
}
public NakedObject createValue(final Double value) {
return getRuntimeContext().adapterFor(value);
}
// /////// toString ///////
@Override
public String toString() {
return "DoubleValueSemanticsProvider: " + format;
}
}
// Copyright (c) Naked Objects Group Ltd.