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From neykov <...@git.apache.org>
Subject [GitHub] incubator-brooklyn pull request: Camp parsing cleanup and fixes
Date Thu, 15 Oct 2015 08:26:41 GMT
Github user neykov commented on a diff in the pull request:

    https://github.com/apache/incubator-brooklyn/pull/955#discussion_r42095105
  
    --- Diff: core/src/main/java/org/apache/brooklyn/core/resolve/JavaServiceSpecResolver.java
---
    @@ -0,0 +1,91 @@
    +/*
    + * 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.core.resolve;
    +
    +import java.util.List;
    +import java.util.Set;
    +
    +import org.apache.brooklyn.api.entity.Application;
    +import org.apache.brooklyn.api.entity.Entity;
    +import org.apache.brooklyn.api.entity.EntitySpec;
    +import org.apache.brooklyn.core.catalog.internal.CatalogUtils;
    +import org.apache.brooklyn.core.mgmt.classloading.BrooklynClassLoadingContext;
    +import org.apache.brooklyn.util.guava.Maybe;
    +import org.apache.brooklyn.util.javalang.Reflections;
    +
    +public class JavaServiceSpecResolver extends AbstractServiceSpecResolver{
    +    private static final String RESOLVER_NAME = "java";
    +
    +    public JavaServiceSpecResolver() {
    +        super(RESOLVER_NAME);
    +    }
    +
    +    @Override
    +    protected boolean canResolve(String type, BrooklynClassLoadingContext loader) {
    +        String localType = getLocalType(type);
    +        Maybe<?> javaType = tryLoadJavaType(localType, loader);
    +        return javaType.isPresent();
    +    }
    +
    +    @Override
    +    public EntitySpec<?> resolve(String type, BrooklynClassLoadingContext loader,
Set<String> encounteredTypes) {
    +        String localType = getLocalType(type);
    +        try {
    +            return resolveInternal(localType, loader);
    +        } catch (Exception e) {
    +            boolean firstOccurrence = encounteredTypes.add(localType);
    +            boolean recursiveButTryJava = !firstOccurrence;
    +            if (recursiveButTryJava) {
    +                throw new IllegalStateException("Recursive reference to " + localType
+ " (and cannot be resolved as a Java type)", e);
    +            } else {
    +                throw e;
    +            }
    +        }
    +    }
    +
    +    private EntitySpec<?> resolveInternal(String localType, BrooklynClassLoadingContext
loader) {
    +        Maybe<Class<? extends Entity>> javaTypeMaybe = tryLoadJavaType(localType,
loader);
    +        if (javaTypeMaybe.isAbsent())
    +            throw new IllegalStateException("Could not find "+localType, ((Maybe.Absent<?>)javaTypeMaybe).getException());
    +        Class<? extends Entity> javaType = javaTypeMaybe.get();
    --- End diff --
    
    Present means non-null (at least in this case)


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