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From neykov <...@git.apache.org>
Subject [GitHub] incubator-brooklyn pull request: Flesh out type creation using the...
Date Wed, 11 Nov 2015 17:05:14 GMT
Github user neykov commented on a diff in the pull request:

    https://github.com/apache/incubator-brooklyn/pull/1017#discussion_r44556979
  
    --- Diff: core/src/main/java/org/apache/brooklyn/core/typereg/AbstractTypePlanTransformer.java
---
    @@ -0,0 +1,130 @@
    +/*
    + * 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.typereg;
    +
    +import org.apache.brooklyn.api.internal.AbstractBrooklynObjectSpec;
    +import org.apache.brooklyn.api.mgmt.ManagementContext;
    +import org.apache.brooklyn.api.typereg.RegisteredType;
    +import org.apache.brooklyn.api.typereg.RegisteredTypeLoadingContext;
    +import org.apache.brooklyn.util.exceptions.Exceptions;
    +import org.apache.brooklyn.util.javalang.JavaClassNames;
    +import org.slf4j.Logger;
    +import org.slf4j.LoggerFactory;
    +
    +/**
    + * Convenience supertype for {@link BrooklynTypePlanTransformer} instances.
    + */
    +public abstract class AbstractTypePlanTransformer implements BrooklynTypePlanTransformer
{
    +
    +    private static final Logger log = LoggerFactory.getLogger(AbstractTypePlanTransformer.class);
    +    
    +    protected ManagementContext mgmt;
    +
    +    @Override
    +    public void injectManagementContext(ManagementContext mgmt) {
    +        this.mgmt = mgmt;
    +    }
    +
    +    private final String format;
    +    private final String formatName;
    +    private final String formatDescription;
    +    
    +    protected AbstractTypePlanTransformer(String format, String formatName, String formatDescription)
{
    +        this.format = format;
    +        this.formatName = formatName;
    +        this.formatDescription = formatDescription;
    +    }
    +    
    +    @Override
    +    public String getFormatCode() {
    +        return format;
    +    }
    +
    +    @Override
    +    public String getFormatName() {
    +        return formatName;
    +    }
    +
    +    @Override
    +    public String getFormatDescription() {
    +        return formatDescription;
    +    }
    +
    +    @Override
    +    public String toString() {
    +        return getFormatCode()+":"+JavaClassNames.simpleClassName(this);
    +    }
    +    
    +    @Override
    +    public double scoreForType(RegisteredType type, RegisteredTypeLoadingContext context)
{
    +        if (getFormatCode().equals(type.getPlan().getPlanFormat())) return 1;
    +        if (type.getPlan().getPlanFormat()==null)
    +            return scoreForNullFormat(type.getPlan().getPlanData(), type, context);
    +        else
    +            return scoreForNonmatchingNonnullFormat(type.getPlan().getPlanFormat(), type.getPlan().getPlanData(),
type, context);
    +    }
    +
    +    protected abstract double scoreForNullFormat(Object planData, RegisteredType type,
RegisteredTypeLoadingContext context);
    +    protected abstract double scoreForNonmatchingNonnullFormat(String planFormat, Object
planData, RegisteredType type, RegisteredTypeLoadingContext context);
    +
    +    /** delegates to more specific abstract create methods,
    +     * and performs common validation and customisation of the items created.
    +     * <p>
    +     * this includes:
    +     * <li> setting the {@link AbstractBrooklynObjectSpec#catalogItemId(String)}
    +     */
    +    @Override
    +    public Object create(final RegisteredType type, final RegisteredTypeLoadingContext
context) {
    +        try {
    +            return validate(new RegisteredTypeKindVisitor<Object>() {
    +                @Override protected Object visitSpec(RegisteredType type) {
    +                    try { 
    +                        AbstractBrooklynObjectSpec<?, ?> result = createSpec(type,
context);
    +                        result.catalogItemId(type.getId());
    +                        return result;
    +                    } catch (Exception e) { throw Exceptions.propagate(e); }
    +                }
    +                @Override protected Object visitBean(RegisteredType type) {
    +                    try { 
    +                        return createBean(type, context);
    +                    } catch (Exception e) { throw Exceptions.propagate(e); }
    +                }
    +                
    +            }.visit(type), type, context);
    +        } catch (UnsupportedTypePlanException e) {
    +            // no logging
    +            throw Exceptions.propagate(e);
    --- End diff --
    
    My understanding is that this is just to prevent the next catch from taking over - worth
a comment. May be even throwing the same exception instead of calling in to `Exceptions.propagate`
to make it more visible (even if the end result is the same).


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