/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.apache.isis.core.progmodel.facets.value.percentage;
import java.text.DecimalFormat;
import java.text.NumberFormat;
import java.text.ParseException;
import org.apache.isis.applib.adapters.EncoderDecoder;
import org.apache.isis.applib.adapters.Parser;
import org.apache.isis.applib.profiles.Localization;
import org.apache.isis.applib.value.Percentage;
import org.apache.isis.core.commons.config.ConfigurationConstants;
import org.apache.isis.core.commons.config.IsisConfiguration;
import org.apache.isis.core.metamodel.adapter.ObjectAdapter;
import org.apache.isis.core.metamodel.facetapi.Facet;
import org.apache.isis.core.metamodel.facetapi.FacetHolder;
import org.apache.isis.core.metamodel.facets.object.parseable.TextEntryParseException;
import org.apache.isis.core.progmodel.facets.object.value.ValueSemanticsProviderAndFacetAbstract;
import org.apache.isis.core.progmodel.facets.object.value.ValueSemanticsProviderContext;
import org.apache.isis.core.progmodel.facets.value.floats.FloatingPointValueFacet;
public class PercentageValueSemanticsProvider extends ValueSemanticsProviderAndFacetAbstract<Percentage> implements
FloatingPointValueFacet {
private static final NumberFormat PERCENTAGE_FORMAT = NumberFormat.getPercentInstance();
private static final NumberFormat DECIMAL_FORMAT = NumberFormat.getNumberInstance();
private static final Percentage DEFAULT_VALUE = new Percentage(0.0f);
private static final int TYPICAL_LENGTH = 12;
private static final boolean IMMUTABLE = true;
private static final boolean EQUAL_BY_CONTENT = true;
public static Class<? extends Facet> type() {
return FloatingPointValueFacet.class;
}
private NumberFormat format = PERCENTAGE_FORMAT;
/**
* Required because implementation of {@link Parser} and {@link EncoderDecoder}.
*/
public PercentageValueSemanticsProvider() {
this(null, null, null);
}
public PercentageValueSemanticsProvider(final FacetHolder holder, final IsisConfiguration configuration,
final ValueSemanticsProviderContext context) {
super(type(), holder, Percentage.class, TYPICAL_LENGTH, IMMUTABLE, EQUAL_BY_CONTENT, DEFAULT_VALUE,
configuration, context);
final String formatRequired = configuration.getString(ConfigurationConstants.ROOT + "value.format.percentage");
if (formatRequired == null) {
format = PERCENTAGE_FORMAT;
} else {
format = new DecimalFormat(formatRequired);
}
}
// //////////////////////////////////////////////////////////////////
// Parser
// //////////////////////////////////////////////////////////////////
@Override
protected Percentage doParse(final Object context, final String text) {
try {
return new Percentage(new Float(format.parse(text).floatValue()));
} catch (final ParseException e) {
try {
return new Percentage(asFloat(text));
} catch (final ParseException ee) {
throw new TextEntryParseException("Not a number " + text, ee);
}
}
}
private Float asFloat(final String text) throws ParseException {
return new Float(DECIMAL_FORMAT.parse(text).floatValue());
}
@Override
public String titleString(final Object value, final Localization localization) {
return titleString(format, value);
}
private String titleString(final NumberFormat formatter, final Object value) {
return value == null ? "" : format.format(((Percentage) value).floatValue());
}
@Override
public String titleStringWithMask(final Object value, final String usingMask) {
return titleString(new DecimalFormat(usingMask), value);
}
// //////////////////////////////////////////////////////////////////
// EncoderDecoder
// //////////////////////////////////////////////////////////////////
@Override
protected String doEncode(final Object object) {
final Percentage per = (Percentage) object;
return String.valueOf(per.floatValue());
}
@Override
protected Percentage doRestore(final String data) {
return new Percentage(Float.valueOf(data).floatValue());
}
// //////////////////////////////////////////////////////////////////
// FloatingPointValueFacet
// //////////////////////////////////////////////////////////////////
@Override
public Float floatValue(final ObjectAdapter object) {
final Percentage per = (Percentage) object.getObject();
return new Float(per.floatValue());
}
@Override
public ObjectAdapter createValue(final Float value) {
return getAdapterMap().adapterFor(value);
}
// //////////////////////////////////////////////////////////////////
// PropertyDefaultFacet
// //////////////////////////////////////////////////////////////////
public Object getDefault(final ObjectAdapter inObject) {
return Float.valueOf(0.0f);
}
// //// toString ////////////////////////////////////////////////////
@Override
public String toString() {
return "PercentageValueSemanticsProvider: " + format;
}
}