001/*
002 *  Licensed to the Apache Software Foundation (ASF) under one
003 *  or more contributor license agreements.  See the NOTICE file
004 *  distributed with this work for additional information
005 *  regarding copyright ownership.  The ASF licenses this file
006 *  to you under the Apache License, Version 2.0 (the
007 *  "License"); you may not use this file except in compliance
008 *  with the License.  You may obtain a copy of the License at
009 *
010 *        http://www.apache.org/licenses/LICENSE-2.0
011 *
012 *  Unless required by applicable law or agreed to in writing,
013 *  software distributed under the License is distributed on an
014 *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
015 *  KIND, either express or implied.  See the License for the
016 *  specific language governing permissions and limitations
017 *  under the License.
018 */
019
020package org.apache.isis.core.progmodel.facets.value.floats;
021
022import java.text.DecimalFormat;
023import java.text.NumberFormat;
024import java.text.ParseException;
025
026import org.apache.isis.applib.profiles.Localization;
027import org.apache.isis.core.commons.config.IsisConfiguration;
028import org.apache.isis.core.metamodel.adapter.ObjectAdapter;
029import org.apache.isis.core.metamodel.facetapi.Facet;
030import org.apache.isis.core.metamodel.facetapi.FacetHolder;
031import org.apache.isis.core.metamodel.facets.object.parseable.TextEntryParseException;
032import org.apache.isis.core.progmodel.facets.object.value.ValueSemanticsProviderAndFacetAbstract;
033import org.apache.isis.core.progmodel.facets.object.value.ValueSemanticsProviderContext;
034
035public class FloatValueSemanticsProviderAbstract extends ValueSemanticsProviderAndFacetAbstract<Float> implements FloatingPointValueFacet {
036
037    public static Class<? extends Facet> type() {
038        return FloatingPointValueFacet.class;
039    }
040
041    private static final Float DEFAULT_VALUE = new Float(0.0f);
042    private static final int TYPICAL_LENGTH = 12;
043
044    private final NumberFormat format;
045
046    public FloatValueSemanticsProviderAbstract(final FacetHolder holder, final Class<Float> adaptedClass, final IsisConfiguration configuration, final ValueSemanticsProviderContext context) {
047        super(type(), holder, adaptedClass, TYPICAL_LENGTH, Immutability.IMMUTABLE, EqualByContent.HONOURED, DEFAULT_VALUE, configuration, context);
048        format = determineNumberFormat("value.format.float");
049    }
050
051    // //////////////////////////////////////////////////////////////////
052    // Parser
053    // //////////////////////////////////////////////////////////////////
054
055    @Override
056    protected Float doParse(final Object context, final String entry) {
057        try {
058            return new Float(format.parse(entry).floatValue());
059        } catch (final ParseException e) {
060            throw new TextEntryParseException("Not a floating point number " + entry, e);
061        }
062    }
063
064    @Override
065    public String titleString(final Object value, final Localization localization) {
066        return titleString(format, value);
067    }
068
069    @Override
070    public String titleStringWithMask(final Object value, final String usingMask) {
071        return titleString(new DecimalFormat(usingMask), value);
072    }
073
074    // //////////////////////////////////////////////////////////////////
075    // EncoderDecoder
076    // //////////////////////////////////////////////////////////////////
077
078    @Override
079    protected String doEncode(final Object object) {
080        return object.toString();
081    }
082
083    @Override
084    protected Float doRestore(final String data) {
085        return new Float(data);
086    }
087
088    // //////////////////////////////////////////////////////////////////
089    // FloatingPointValueFacet
090    // //////////////////////////////////////////////////////////////////
091
092    @Override
093    public Float floatValue(final ObjectAdapter object) {
094        return object == null ? null : (Float) object.getObject();
095    }
096
097    @Override
098    public ObjectAdapter createValue(final Float value) {
099        return getAdapterManager().adapterFor(value);
100    }
101
102    // /////// toString ///////
103
104    @Override
105    public String toString() {
106        return "FloatValueSemanticsProvider: " + format;
107    }
108
109}