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Costin Leau
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Nov 28, 2011
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85 changes: 85 additions & 0 deletions
85
src/main/java/org/springframework/data/hadoop/config/PigParser.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,85 @@ | ||
| /* | ||
| * Copyright 2011 the original author or authors. | ||
| * | ||
| * 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.springframework.data.hadoop.config; | ||
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| import java.util.Map; | ||
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| import org.springframework.beans.factory.support.BeanDefinitionBuilder; | ||
| import org.springframework.beans.factory.xml.ParserContext; | ||
| import org.springframework.data.hadoop.pig.PigContextFactoryBean; | ||
| import org.springframework.data.hadoop.pig.PigServerFactoryBean; | ||
| import org.springframework.util.StringUtils; | ||
| import org.w3c.dom.Element; | ||
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| /** | ||
| * Parser for pig element. | ||
| * | ||
| * @author Costin Leau | ||
| */ | ||
| class PigParser extends AbstractImprovedSimpleBeanDefinitionParser { | ||
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| @Override | ||
| protected Class<?> getBeanClass(Element element) { | ||
| return PigServerFactoryBean.class; | ||
| } | ||
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| @Override | ||
| protected boolean isEligibleAttribute(String attributeName) { | ||
| return !("scripts".equals(attributeName) || "paths-to-skip".equals(attributeName) | ||
| || "job-tracker".equals(attributeName) || "configuration-ref".equals(attributeName) || "exec-type".equals(attributeName)) | ||
| && super.isEligibleAttribute(attributeName); | ||
| } | ||
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| @Override | ||
| protected void doParse(Element element, ParserContext parserContext, BeanDefinitionBuilder builder) { | ||
| // parse attributes using conventions | ||
| super.doParse(element, parserContext, builder); | ||
|
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| // parse resources | ||
| String attr = element.getAttribute("scripts"); | ||
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| if (StringUtils.hasText(attr)) { | ||
| builder.addPropertyValue("scripts", StringUtils.commaDelimitedListToStringArray(attr)); | ||
| } | ||
|
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| attr = element.getAttribute("paths-to-skip"); | ||
| if (StringUtils.hasText(attr)) { | ||
| builder.addPropertyValue("pathsToSkip", StringUtils.commaDelimitedListToStringArray(attr)); | ||
| } | ||
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| // parse nested PigContext definition | ||
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| BeanDefinitionBuilder contextBuilder = BeanDefinitionBuilder.genericBeanDefinition(PigContextFactoryBean.class); | ||
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| Map parsedProps = parserContext.getDelegate().parsePropsElement(element); | ||
| if (!parsedProps.isEmpty()) { | ||
| contextBuilder.addPropertyValue("properties", parsedProps); | ||
| } | ||
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| NamespaceUtils.setPropertyValue(element, contextBuilder, "job-tracker"); | ||
| NamespaceUtils.setPropertyValue(element, contextBuilder, "exec-type"); | ||
| NamespaceUtils.setPropertyReference(element, contextBuilder, "configuration-ref"); | ||
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| builder.addPropertyValue("pigContext", contextBuilder.getBeanDefinition()); | ||
| } | ||
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| @Override | ||
| protected String defaultId() { | ||
| return "hadoop-pig"; | ||
| } | ||
| } |
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