org.jage.platform.component.pico.injector.Parameters.java Source code

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Here is the source code for org.jage.platform.component.pico.injector.Parameters.java

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/**
 * Copyright (C) 2006 - 2012
 *   Pawel Kedzior
 *   Tomasz Kmiecik
 *   Kamil Pietak
 *   Krzysztof Sikora
 *   Adam Wos
 *   Lukasz Faber
 *   Daniel Krzywicki
 *   and other students of AGH University of Science and Technology.
 *
 * This file is part of AgE.
 *
 * AgE is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * AgE is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with AgE.  If not, see <http://www.gnu.org/licenses/>.
 */
/*
 * Created: 2012-03-27
 * $Id: Parameters.java 471 2012-10-30 11:17:00Z faber $
 */

package org.jage.platform.component.pico.injector;

import java.lang.annotation.Annotation;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;

import static java.lang.String.format;

import org.picocontainer.ComponentAdapter;
import org.picocontainer.NameBinding;
import org.picocontainer.Parameter;
import org.picocontainer.PicoCompositionException;
import org.picocontainer.PicoContainer;
import org.picocontainer.injectors.AbstractInjector.UnsatisfiableDependenciesException;
import org.picocontainer.parameters.BasicComponentParameter;
import org.picocontainer.parameters.ConstantParameter;

import org.jage.platform.component.definition.ConfigurationException;
import org.jage.platform.component.definition.IArgumentDefinition;
import org.jage.platform.component.definition.ReferenceDefinition;
import org.jage.platform.component.definition.SimpleTypeParsers;
import org.jage.platform.component.definition.ValueDefinition;

import com.google.common.collect.Lists;
import com.google.common.collect.Maps;

import static com.google.common.base.Preconditions.checkNotNull;

/**
 * Utilities to consistently create Parameters.
 *
 * @author AGH AgE Team
 */
public final class Parameters {

    private Parameters() {
    }

    public static List<Parameter> fromList(final List<IArgumentDefinition> argumentDefinitions) {
        List<Parameter> parameters = Lists.newArrayListWithCapacity(argumentDefinitions.size());
        for (IArgumentDefinition argumentDefinition : argumentDefinitions) {
            parameters.add(from(argumentDefinition));
        }
        return parameters;
    }

    public static Map<Parameter, Parameter> fromMap(
            final Map<IArgumentDefinition, IArgumentDefinition> argumentDefinitions) {
        Map<Parameter, Parameter> parameters = Maps.newHashMapWithExpectedSize(argumentDefinitions.size());
        for (Entry<IArgumentDefinition, IArgumentDefinition> e : argumentDefinitions.entrySet()) {
            parameters.put(from(e.getKey()), from(e.getValue()));
        }
        return parameters;
    }

    public static <K> Map<K, Parameter> fromMapping(final Map<K, IArgumentDefinition> mapping) {
        Map<K, Parameter> parameters = Maps.newHashMapWithExpectedSize(mapping.size());
        for (Entry<K, IArgumentDefinition> e : mapping.entrySet()) {
            parameters.put(e.getKey(), from(e.getValue()));
        }
        return parameters;
    }

    public static Parameter[] from(final Class<?>[] types) {
        final Parameter[] parameters = new Parameter[types.length];
        for (int i = 0; i < parameters.length; i++) {
            parameters[i] = from(types[i]);
        }
        return parameters;
    }

    public static Parameter from(final IArgumentDefinition argumentDefinition) {
        if (argumentDefinition instanceof ReferenceDefinition) {
            ReferenceDefinition referenceDefinition = (ReferenceDefinition) argumentDefinition;
            return new StrictComponentParameter(referenceDefinition.getTargetName());
        } else {
            ValueDefinition valueDefinition = (ValueDefinition) argumentDefinition;
            try {
                Object value = SimpleTypeParsers.parse(valueDefinition.getStringValue(),
                        valueDefinition.getDesiredClass());
                return new ConstantParameter(value);
            } catch (ConfigurationException e) {
                throw new PicoCompositionException(e);
            }
        }
    }

    public static Parameter from(final Class<?> type) {
        return new StrictComponentParameter(type);
    }

    static final class StrictComponentParameter extends BasicComponentParameter {

        private static final long serialVersionUID = 1L;

        private final Object key;

        public StrictComponentParameter(final Object key) {
            this.key = checkNotNull(key);
        }

        @SuppressWarnings({ "rawtypes", "unchecked" })
        @Override
        protected <T> ComponentAdapter<T> resolveAdapter(final PicoContainer container,
                final ComponentAdapter adapter, final Class<T> expectedType, final NameBinding expectedNameBinding,
                final boolean useNames, final Annotation binding) {
            // First search by value
            ComponentAdapter<T> result = (ComponentAdapter<T>) container.getComponentAdapter(key);
            if (result == null && (key instanceof Class)) {
                // Otherwise, if the key is a class, try to look up by type
                result = container.getComponentAdapter((Class<T>) key, (NameBinding) null);
            }

            if (result == null || !expectedType.isAssignableFrom(result.getComponentImplementation())) {
                throw new UnsatisfiableDependenciesException(
                        format("unsatisfied dependency '%1$s' in %2$s ", key, container));
            }
            return result;
        }
    }
}