com.eucalyptus.compute.identifier.DispatchingResourceIdentifierCanonicalizer.java Source code

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Here is the source code for com.eucalyptus.compute.identifier.DispatchingResourceIdentifierCanonicalizer.java

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/*************************************************************************
 * Copyright 2009-2014 Eucalyptus Systems, Inc.
 *
 * This program 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; version 3 of the License.
 *
 * This program 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 this program.  If not, see http://www.gnu.org/licenses/.
 *
 * Please contact Eucalyptus Systems, Inc., 6755 Hollister Ave., Goleta
 * CA 93117, USA or visit http://www.eucalyptus.com/licenses/ if you need
 * additional information or have any questions.
 ************************************************************************/
package com.eucalyptus.compute.identifier;

import javax.annotation.Nullable;
import com.eucalyptus.util.CollectionUtils;
import com.google.common.base.Function;
import com.google.common.base.Joiner;
import com.google.common.collect.Iterables;

/**
 *
 */
class DispatchingResourceIdentifierCanonicalizer implements ResourceIdentifierCanonicalizer {

    private final Iterable<ResourceIdentifierCanonicalizer> canonicalizers;

    DispatchingResourceIdentifierCanonicalizer(final Iterable<ResourceIdentifierCanonicalizer> canonicalizers) {
        this.canonicalizers = canonicalizers;
    }

    @Override
    public String getName() {
        return Joiner.on(",").join(Iterables.transform(canonicalizers,
                ResourceIdentifiers.ResourceIdentifierCanonicalizerToName.INSTANCE));
    }

    @Override
    public String canonicalizePrefix(final String prefix) {
        return CollectionUtils.reduce(canonicalizers, prefix,
                new Function<String, Function<ResourceIdentifierCanonicalizer, String>>() {
                    @Nullable
                    @Override
                    public Function<ResourceIdentifierCanonicalizer, String> apply(final String value) {
                        return new Function<ResourceIdentifierCanonicalizer, String>() {
                            @Nullable
                            @Override
                            public String apply(final ResourceIdentifierCanonicalizer canonicalizer) {
                                return canonicalizer.canonicalizePrefix(value);
                            }
                        };
                    }
                });
    }

    @Override
    public String canonicalizeHex(final String hex) {
        return CollectionUtils.reduce(canonicalizers, hex,
                new Function<String, Function<ResourceIdentifierCanonicalizer, String>>() {
                    @Nullable
                    @Override
                    public Function<ResourceIdentifierCanonicalizer, String> apply(final String value) {
                        return new Function<ResourceIdentifierCanonicalizer, String>() {
                            @Nullable
                            @Override
                            public String apply(final ResourceIdentifierCanonicalizer canonicalizer) {
                                return canonicalizer.canonicalizeHex(value);
                            }
                        };
                    }
                });
    }
}