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Core base classes for CAMP server implementation
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/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.apache.brooklyn.camp.spi;

import org.apache.brooklyn.camp.spi.collection.BasicResourceLookup;
import org.apache.brooklyn.camp.spi.collection.ResourceLookup;
import org.apache.brooklyn.camp.spi.collection.ResourceLookup.EmptyResourceLookup;


/** Holds the metadata (name, description, etc) for a PCT
 * as well as fields pointing to behaviour (eg creation of PlatformComponent).
 * 
 * See {@link AbstractResource} for more general information.
 */
public class ApplicationComponent extends AbstractResource {

    public static final String CAMP_TYPE = "ApplicationComponent";
    static { assert CAMP_TYPE.equals(ApplicationComponent.class.getSimpleName()); }
    
    /** Use {@link #builder()} to create */
    protected ApplicationComponent() {}

    ResourceLookup applicationComponents;
    ResourceLookup platformComponents;
    String externalManagementUri;
    
    public ResourceLookup getApplicationComponents() {
        return applicationComponents != null ? applicationComponents : new EmptyResourceLookup();
    }
    public ResourceLookup getPlatformComponents() {
        return platformComponents != null ? platformComponents : new EmptyResourceLookup();
    }

    private void setApplicationComponents(ResourceLookup applicationComponents) {
        this.applicationComponents = applicationComponents;
    }
    private void setPlatformComponents(ResourceLookup platformComponents) {
        this.platformComponents = platformComponents;
    }
    
    // builder
    
    public static Builder builder() {
        return new ApplicationComponent().new Builder(CAMP_TYPE);
    }
    
    public class Builder extends AbstractResource.Builder> {
        
        protected Builder(String type) { super(type); }

        public Builder applicationComponentTemplates(ResourceLookup x) { ApplicationComponent.this.setApplicationComponents(x); return thisBuilder(); }
        public Builder platformComponentTemplates(ResourceLookup x) { ApplicationComponent.this.setPlatformComponents(x); return thisBuilder(); }
        
        public synchronized Builder add(ApplicationComponent x) {
            if (ApplicationComponent.this.applicationComponents==null) {
                ApplicationComponent.this.applicationComponents = new BasicResourceLookup();
            }
            if (!(ApplicationComponent.this.applicationComponents instanceof BasicResourceLookup)) {
                throw new IllegalStateException("Cannot add to resource lookup "+ApplicationComponent.this.applicationComponents);
            }
            ((BasicResourceLookup)ApplicationComponent.this.applicationComponents).add(x);
            return thisBuilder();
        }
        
        public synchronized Builder add(PlatformComponent x) {
            if (ApplicationComponent.this.platformComponents==null) {
                ApplicationComponent.this.platformComponents = new BasicResourceLookup();
            }
            if (!(ApplicationComponent.this.platformComponents instanceof BasicResourceLookup)) {
                throw new IllegalStateException("Cannot add to resource lookup "+ApplicationComponent.this.platformComponents);
            }
            ((BasicResourceLookup)ApplicationComponent.this.platformComponents).add(x);
            return thisBuilder();
        }
    }

}