org.nabucco.alfresco.enhScriptEnv.common.script.converter.general.NumberConverter.java Source code

Introduction

Here is the source code for org.nabucco.alfresco.enhScriptEnv.common.script.converter.general.NumberConverter.java

Source

/*
 * Copyright 2015 PRODYNA AG
 *
 * Licensed under the Eclipse Public License (EPL), Version 1.0 (the "License"); you may not use
 * this file except in compliance with the License. You may obtain a copy of the License at
 *
 * https://www.eclipse.org/legal/epl-v10.html
 *
 * 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.nabucco.alfresco.enhScriptEnv.common.script.converter.general;

import java.util.Arrays;
import java.util.Collections;
import java.util.HashSet;
import java.util.Set;

import org.alfresco.util.PropertyCheck;
import org.nabucco.alfresco.enhScriptEnv.common.script.converter.ValueConverter;
import org.nabucco.alfresco.enhScriptEnv.common.script.converter.ValueInstanceConverterRegistry;
import org.nabucco.alfresco.enhScriptEnv.common.script.converter.ValueInstanceConverterRegistry.ValueInstanceConverter;
import org.springframework.beans.factory.InitializingBean;

/**
 * @author Axel Faust, <a href="http://www.prodyna.com">PRODYNA AG</a>
 */
public class NumberConverter implements ValueInstanceConverter, InitializingBean {

    private static final Set<Class<? extends Number>> SIMPLE_NUMBER_CLASSES = Collections
            .unmodifiableSet(new HashSet<Class<? extends Number>>(
                    Arrays.asList(Integer.class, Long.class, Float.class, Double.class, Short.class, Byte.class,
                            int.class, long.class, float.class, double.class, short.class, byte.class)));

    protected ValueInstanceConverterRegistry registry;

    /**
     * @param registry
     *            the registry to set
     */
    public void setRegistry(final ValueInstanceConverterRegistry registry) {
        this.registry = registry;
    }

    /**
     *
     * {@inheritDoc}
     */
    @Override
    public void afterPropertiesSet() {
        PropertyCheck.mandatory(this, "registry", this.registry);

        this.registry.registerValueInstanceConverter(Number.class, this);
    }

    /**
     *
     * {@inheritDoc}
     */
    @Override
    public int getForScriptConversionConfidence(final Class<?> valueInstanceClass, final Class<?> expectedClass) {
        final int confidence;
        if (Number.class.isAssignableFrom(valueInstanceClass) && (expectedClass.isAssignableFrom(Number.class)
                || SIMPLE_NUMBER_CLASSES.contains(expectedClass))) {
            confidence = MEDIUM_CONFIDENCE;
        } else {
            confidence = LOWEST_CONFIDENCE;
        }
        return confidence;
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public boolean canConvertValueForScript(final Object value, final ValueConverter globalDelegate,
            final Class<?> expectedClass) {
        final boolean canConvert = value instanceof Number
                && (expectedClass.isAssignableFrom(Number.class) || SIMPLE_NUMBER_CLASSES.contains(expectedClass));
        return canConvert;
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public Object convertValueForScript(final Object value, final ValueConverter globalDelegate,
            final Class<?> expectedClass) {
        return this.convertNumber(value, expectedClass);
    }

    /**
     *
     * {@inheritDoc}
     */
    @Override
    public int getForJavaConversionConfidence(final Class<?> valueInstanceClass, final Class<?> expectedClass) {
        final int confidence;
        if (Number.class.isAssignableFrom(valueInstanceClass) && (expectedClass.isAssignableFrom(Number.class)
                || SIMPLE_NUMBER_CLASSES.contains(expectedClass))) {
            confidence = MEDIUM_CONFIDENCE;
        } else {
            confidence = LOWEST_CONFIDENCE;
        }
        return confidence;
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public boolean canConvertValueForJava(final Object value, final ValueConverter globalDelegate,
            final Class<?> expectedClass) {
        final boolean canConvert = value instanceof Number
                && (expectedClass.isAssignableFrom(Number.class) || SIMPLE_NUMBER_CLASSES.contains(expectedClass));
        return canConvert;
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public Object convertValueForJava(final Object value, final ValueConverter globalDelegate,
            final Class<?> expectedClass) {
        return this.convertNumber(value, expectedClass);
    }

    protected Object convertNumber(final Object value, final Class<?> expectedClass) {
        if (!(value instanceof Number)) {
            throw new IllegalArgumentException("value must be a " + Number.class);
        }

        final Number resultNumber;
        if (expectedClass.isAssignableFrom(Number.class)) {
            final double doubleValue = ((Number) value).doubleValue();
            if (doubleValue == Math.floor(doubleValue)) {
                resultNumber = Long.valueOf(Math.round(Math.floor(doubleValue)));
            } else {
                resultNumber = Double.valueOf(doubleValue);
            }
        } else if (Integer.class.equals(expectedClass) || int.class.equals(expectedClass)) {
            resultNumber = Integer.valueOf(((Number) value).intValue());
        } else if (Long.class.equals(expectedClass) || long.class.equals(expectedClass)) {
            resultNumber = Long.valueOf(((Number) value).longValue());
        } else if (Float.class.equals(expectedClass) || float.class.equals(expectedClass)) {
            resultNumber = Float.valueOf(((Number) value).floatValue());
        } else if (Double.class.equals(expectedClass) || double.class.equals(expectedClass)) {
            resultNumber = Double.valueOf(((Number) value).doubleValue());
        } else if (Byte.class.equals(expectedClass) || byte.class.equals(expectedClass)) {
            resultNumber = Byte.valueOf(((Number) value).byteValue());
        } else {
            resultNumber = Short.valueOf(((Number) value).shortValue());
        }

        return resultNumber;
    }

}