WorkbenchPreferenceScopeResolver.java

/*
 * Copyright 2016 Red Hat, Inc. and/or its affiliates.
 *
 * 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 org.kie.workbench.common.services.shared.preferences.config;

import java.util.List;

import org.jboss.errai.common.client.api.annotations.MapsTo;
import org.jboss.errai.common.client.api.annotations.Portable;
import org.uberfire.preferences.shared.PreferenceScope;
import org.uberfire.preferences.shared.PreferenceScopeResolver;
import org.uberfire.preferences.shared.impl.exception.InvalidPreferenceScopeException;

@Portable
public class WorkbenchPreferenceScopeResolver implements PreferenceScopeResolver {

    private final List<PreferenceScope> order;

    public WorkbenchPreferenceScopeResolver( @MapsTo("order") final List<PreferenceScope> order ) {
        this.order = order;
    }

    @Override
    public PreferenceScope resolve( final String... scopeTypes ) {
        if ( scopeTypes != null && scopeTypes.length == 1 ) {
            if ( WorkbenchPreferenceScopes.getUserScopedScopes().contains( scopeTypes[0] ) ) {
                return getScopeFromOrder( WorkbenchPreferenceScopes.USER, scopeTypes[0] );
            }

            return getScopeFromOrder( scopeTypes );
        }

        throw new InvalidPreferenceScopeException( "The passed scope types are invalid." );
    }

    private PreferenceScope getScopeFromOrder( final String... scopeTypes ) {
        for ( PreferenceScope scope : order ) {
            boolean match = true;
            PreferenceScope currentScope = scope;

            for ( int i = 0; i < scopeTypes.length; i++ ) {
                if ( currentScope == null || !currentScope.type().equals( scopeTypes[ i ] ) ) {
                    match = false;
                    break;
                }

                currentScope = currentScope.childScope();
            }

            if ( match && currentScope == null ) {
                return scope;
            }
        }

        throw new InvalidPreferenceScopeException( "The passed scope types are invalid." );
    }
}