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Tensorics is a java framework which uses a tensor as a central object. A tensor represents a set of values placed in an N-dimensional space. Wherever you are tempted to use maps of maps, a tensor might be a good choice ;-) Tensorics provides methods to create, transform and performing calculations with those tensors.

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// @formatter:off
 /*******************************************************************************
 *
 * This file is part of tensorics.
 * 
 * Copyright (c) 2008-2011, CERN. All rights reserved.
 *
 * 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.
 * 
 ******************************************************************************/
// @formatter:on

package org.tensorics.core.resolve.options;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.List;

import org.tensorics.core.commons.options.ImmutableOptionRegistry;
import org.tensorics.core.commons.options.OptionRegistry;

import com.google.common.collect.ImmutableList;

/**
 * Utility class which provides factory methods to different processing options.
 * 
 * @author kfuchsbe
 */
public final class ResolvingOptions {

    /**
     * The list of default options.
     */
    private static final ImmutableList DEFAULT_OPTIONS = ImmutableList. of(
            new RethrowExceptionHandlingStrategy(), new TakeFirstResolverSelectionStrategy());

    private ResolvingOptions() {
        /* only static methods */
    }

    /**
     * Creates a option-registry which will contain the default options plus the ones given as parameters.
     * 
     * @param options all the options which should be put into the registry in addition to (or overriding) default
     *            options.
     * @return a new processing options registry, which can be used by the processor to retrieve the options.
     */
    public static OptionRegistry createRegistryWithDefaultsExcept(ResolvingOption... options) {
        List processingOptions = new ArrayList<>(defaultOptions());
        processingOptions.addAll(Arrays.asList(options));
        return ImmutableOptionRegistry.of(processingOptions);
    }

    public static ResolvingOption rethrowExceptions() {
        return new RethrowExceptionHandlingStrategy();
    }

    public static ResolvingOption handleExceptionsInFirstAncestor() {
        return new HandleWithFirstCapableAncestorStrategy();
    }

    public static Collection defaultOptions() {
        return DEFAULT_OPTIONS;
    }

}