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Formerly known as the Grails BeanBuilder, now in Spring proper. Based on spring-projects#355 but heavily refactored and restructured. Issue: SPR-7123
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125 changes: 125 additions & 0 deletions
125
...rc/main/groovy/org/springframework/beans/factory/groovy/GroovyDynamicElementReader.groovy
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| /* | ||
| * Copyright 2002-2013 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. | ||
| */ | ||
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| package org.springframework.beans.factory.groovy | ||
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| import groovy.xml.StreamingMarkupBuilder | ||
| import org.springframework.beans.factory.config.BeanDefinitionHolder | ||
| import org.springframework.beans.factory.xml.BeanDefinitionParserDelegate | ||
| import org.w3c.dom.Element | ||
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| /** | ||
| * Used by GroovyBeanDefinitionReader to read a Spring XML namespace expression | ||
| * in the Groovy DSL. | ||
| * | ||
| * @author Jeff Brown | ||
| * @author Juergen Hoeller | ||
| * @since 4.0 | ||
| */ | ||
| @groovy.transform.PackageScope | ||
| class GroovyDynamicElementReader extends GroovyObjectSupport { | ||
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| private final String rootNamespace | ||
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| private final Map<String, String> xmlNamespaces | ||
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| private final BeanDefinitionParserDelegate delegate | ||
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| private final GroovyBeanDefinitionWrapper beanDefinition | ||
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| protected final boolean decorating; | ||
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| private boolean callAfterInvocation = true | ||
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| public GroovyDynamicElementReader(String namespace, Map<String, String> namespaceMap, | ||
| BeanDefinitionParserDelegate delegate, GroovyBeanDefinitionWrapper beanDefinition, boolean decorating) { | ||
| super(); | ||
| this.rootNamespace = namespace | ||
| this.xmlNamespaces = namespaceMap | ||
| this.delegate = delegate | ||
| this.beanDefinition = beanDefinition; | ||
| this.decorating = decorating; | ||
| } | ||
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| @Override | ||
| public Object invokeMethod(String name, Object args) { | ||
| if (name.equals("doCall")) { | ||
| def callable = args[0] | ||
| callable.resolveStrategy = Closure.DELEGATE_FIRST | ||
| callable.delegate = this | ||
| def result = callable.call() | ||
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| if (this.callAfterInvocation) { | ||
| afterInvocation() | ||
| this.callAfterInvocation = false | ||
| } | ||
| return result | ||
| } | ||
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| else { | ||
| StreamingMarkupBuilder builder = new StreamingMarkupBuilder(); | ||
| def myNamespace = this.rootNamespace | ||
| def myNamespaces = this.xmlNamespaces | ||
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| def callable = { | ||
| for (namespace in myNamespaces) { | ||
| mkp.declareNamespace([(namespace.key):namespace.value]) | ||
| } | ||
| if (args && (args[-1] instanceof Closure)) { | ||
| args[-1].resolveStrategy = Closure.DELEGATE_FIRST | ||
| args[-1].delegate = builder | ||
| } | ||
| delegate."$myNamespace"."$name"(*args) | ||
| } | ||
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| callable.resolveStrategy = Closure.DELEGATE_FIRST | ||
| callable.delegate = builder | ||
| def writable = builder.bind(callable) | ||
| def sw = new StringWriter() | ||
| writable.writeTo(sw) | ||
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| Element element = this.delegate.readerContext.readDocumentFromString(sw.toString()).documentElement | ||
| this.delegate.initDefaults(element) | ||
| if (this.decorating) { | ||
| BeanDefinitionHolder holder = this.beanDefinition.beanDefinitionHolder; | ||
| holder = this.delegate.decorateIfRequired(element, holder, null) | ||
| this.beanDefinition.setBeanDefinitionHolder(holder) | ||
| } | ||
| else { | ||
| def beanDefinition = this.delegate.parseCustomElement(element) | ||
| if (beanDefinition) { | ||
| this.beanDefinition.setBeanDefinition(beanDefinition) | ||
| } | ||
| } | ||
| if (this.callAfterInvocation) { | ||
| afterInvocation() | ||
| this.callAfterInvocation = false | ||
| } | ||
| return element | ||
| } | ||
| } | ||
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| /** | ||
| * Hook that subclass or anonymous classes can overwrite to implement custom behavior | ||
| * after invocation completes. | ||
| */ | ||
| protected void afterInvocation() { | ||
| // NOOP | ||
| } | ||
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| } |
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