de.cosmocode.palava.ipc.json.custom.php.explorer.Commands.java Source code

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Here is the source code for de.cosmocode.palava.ipc.json.custom.php.explorer.Commands.java

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/**
 * Copyright 2010 CosmoCode GmbH
 *
 * Licensed 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 de.cosmocode.palava.ipc.json.custom.php.explorer;

import java.util.Map;

import com.google.common.base.Function;
import com.google.common.base.Functions;
import com.google.common.base.Predicate;
import com.google.common.collect.Iterables;
import com.google.inject.Inject;
import com.google.inject.Provider;
import com.google.inject.Singleton;

import de.cosmocode.collections.utility.UtilityList;
import de.cosmocode.commons.reflect.Classpath;
import de.cosmocode.commons.reflect.Packages;
import de.cosmocode.commons.reflect.Reflection;
import de.cosmocode.palava.ipc.IpcCall;
import de.cosmocode.palava.ipc.IpcCommand;
import de.cosmocode.palava.ipc.IpcCommand.Description;
import de.cosmocode.palava.ipc.IpcCommand.Param;
import de.cosmocode.palava.ipc.IpcCommand.Return;
import de.cosmocode.palava.ipc.IpcCommandExecutionException;
import de.cosmocode.palava.ipc.cache.analyzer.TimeCached;
import de.cosmocode.rendering.Renderer;

/**
 * See below.
 * 
 * @author Tobias Sarnowski
 */
@Description("Returns a list of all commands available in the JVM.")
@Param(name = "packages", description = "a list of packages to search in")
@Return(name = "commands", description = "a list of all commands")
@TimeCached
@Singleton
public final class Commands implements IpcCommand {

    private final Predicate<Class<?>> filter = Reflection.isSubtypeOf(IpcCommand.class)
            .and(Reflection.isInterface().negate()).and(Reflection.isAbstract().negate());

    private final Provider<Renderer> rendererProvider;

    @Inject
    Commands(Provider<Renderer> rendererProvider) {
        this.rendererProvider = rendererProvider;
    }

    @Override
    public void execute(IpcCall call, Map<String, Object> result) throws IpcCommandExecutionException {
        final UtilityList<Object> packageNames = call.getArguments().getList("packages");

        final Renderer renderer = rendererProvider.get();

        final Classpath classpath = Reflection.defaultClasspath();
        final Function<Object, String> toString = Functions.toStringFunction();
        final Packages packages = classpath.restrictTo(Iterables.transform(packageNames, toString));
        final Iterable<Class<? extends IpcCommand>> commands = Iterables.transform(packages.filter(filter),
                Reflection.asSubclass(IpcCommand.class));

        renderer.value(commands, CommandRenderer.INSTANCE);
        result.put("commands", renderer.build());
    }

}