org.nabucco.alfresco.enhScriptEnv.common.script.converter.rhino.DateConverter.java Source code

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Here is the source code for org.nabucco.alfresco.enhScriptEnv.common.script.converter.rhino.DateConverter.java

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/*
 * 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.rhino;

import java.util.Date;

import org.alfresco.util.PropertyCheck;
import org.mozilla.javascript.Context;
import org.mozilla.javascript.IdScriptableObject;
import org.mozilla.javascript.ScriptRuntime;
import org.mozilla.javascript.Scriptable;
import org.mozilla.javascript.ScriptableObject;
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 DateConverter implements ValueInstanceConverter, InitializingBean {

    private static final String TYPE_DATE = "Date";
    private static final Scriptable DUMMY_SCOPE;
    static {
        final Context cx = Context.enter();
        try {
            DUMMY_SCOPE = cx.initStandardObjects(null, true);
            DUMMY_SCOPE.delete("Packages");
            DUMMY_SCOPE.delete("getClass");
            DUMMY_SCOPE.delete("java");
            ((ScriptableObject) DUMMY_SCOPE).sealObject();
        } finally {
            Context.exit();
        }
    }

    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(Date.class, this);
        this.registry.registerValueInstanceConverter(IdScriptableObject.class, this);
    }

    /**
     *
     * {@inheritDoc}
     */
    @Override
    public int getForJavaConversionConfidence(final Class<?> valueInstanceClass, final Class<?> expectedClass) {
        final int confidence;
        if (IdScriptableObject.class.isAssignableFrom(valueInstanceClass)
                && expectedClass.isAssignableFrom(Date.class)) {
            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 IdScriptableObject
                && TYPE_DATE.equals(((IdScriptableObject) value).getClassName())
                && expectedClass.isAssignableFrom(Date.class);
        return canConvert;
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public Object convertValueForJava(final Object value, final ValueConverter globalDelegate,
            final Class<?> expectedClass) {
        final Object result = Context.jsToJava(value, Date.class);
        return result;
    }

    /**
     *
     * {@inheritDoc}
     */
    @Override
    public int getForScriptConversionConfidence(final Class<?> valueInstanceClass, final Class<?> expectedClass) {
        final int confidence;
        if (Date.class.isAssignableFrom(valueInstanceClass)
                && expectedClass.isAssignableFrom(IdScriptableObject.class)) {
            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 Date
                && expectedClass.isAssignableFrom(IdScriptableObject.class);
        return canConvert;
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public Object convertValueForScript(final Object value, final ValueConverter globalDelegate,
            final Class<?> expectedClass) {
        if (!(value instanceof Date)) {
            throw new IllegalArgumentException("value must be a date");
        }

        Context.enter();
        try {
            // Note: Context.javaToJS actually does not handle Date in a way that would make them "native Dates"
            final Object result = ScriptRuntime.newObject(Context.getCurrentContext(), DUMMY_SCOPE, TYPE_DATE,
                    new Object[] { Long.valueOf(((Date) value).getTime()) });
            return result;
        } finally {
            Context.exit();
        }
    }
}