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AbstractTransformerParser now creates the actual endpoint rather than requiring a "ref" to an object that implements Transformer. Therefore the element being parsed must provide 'input-channel' and 'output-channel'.

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This commit is contained in:
Mark Fisher
2008-09-26 17:42:11 +00:00
parent 9ee921ed7c
commit 959b906f4e
13 changed files with 307 additions and 179 deletions
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55
org.springframework.integration/src/main/java/org/springframework/integration/config/AbstractEndpointParser.java
View File

@@ -27,6 +27,7 @@ import org.springframework.beans.factory.xml.AbstractSingleBeanDefinitionParser;
import org.springframework.beans.factory.xml.ParserContext;
import org.springframework.integration.ConfigurationException;
import org.springframework.integration.endpoint.MessageEndpoint;
import org.springframework.util.Assert;
import org.springframework.util.StringUtils;
import org.springframework.util.xml.DomUtils;
@@ -54,8 +55,18 @@ public abstract class AbstractEndpointParser extends AbstractSingleBeanDefinitio
private static final String INTERCEPTORS_ELEMENT = "interceptors";
/**
* Subclasses may override this method to specify whether the endpoint type
* expects a "ref" (and possibly a "method") in order to adapt an Object.
*
* <p>The default is <em>true</em>.
*/
protected boolean requiresBeanReference() {
return true;
}
@Override
protected Class<?> getBeanClass(Element element) {
protected final Class<?> getBeanClass(Element element) {
return this.getEndpointClass();
}
@@ -71,17 +82,19 @@ public abstract class AbstractEndpointParser extends AbstractSingleBeanDefinitio
@Override
protected void doParse(Element element, ParserContext parserContext, BeanDefinitionBuilder builder) {
String ref = element.getAttribute(REF_ATTRIBUTE);
if (!StringUtils.hasText(ref)) {
throw new ConfigurationException("The '" + REF_ATTRIBUTE + "' attribute is required.");
}
if (StringUtils.hasText(element.getAttribute(METHOD_ATTRIBUTE))) {
String method = element.getAttribute(METHOD_ATTRIBUTE);
String adapterBeanName = this.parseAdapter(ref, method, element, parserContext);
builder.addConstructorArgReference(adapterBeanName);
}
else {
builder.addConstructorArgReference(ref);
if (this.requiresBeanReference()) {
String ref = element.getAttribute(REF_ATTRIBUTE);
if (!StringUtils.hasText(ref)) {
throw new ConfigurationException("The '" + REF_ATTRIBUTE + "' attribute is required.");
}
if (StringUtils.hasText(element.getAttribute(METHOD_ATTRIBUTE))) {
String method = element.getAttribute(METHOD_ATTRIBUTE);
String adapterBeanName = this.parseAdapter(ref, method, element, parserContext);
builder.addConstructorArgReference(adapterBeanName);
}
else {
builder.addConstructorArgReference(ref);
}
}
String inputChannel = element.getAttribute(INPUT_CHANNEL_ATTRIBUTE);
if (!StringUtils.hasText(inputChannel)) {
@@ -110,10 +123,14 @@ public abstract class AbstractEndpointParser extends AbstractSingleBeanDefinitio
}
private String parseAdapter(String ref, String method, Element element, ParserContext parserContext) {
BeanDefinitionBuilder builder = BeanDefinitionBuilder.genericBeanDefinition(this.getMethodInvokingAdapterClass());
Class<?> adapterClass = this.getMethodInvokingAdapterClass();
Assert.state(adapterClass != null,
"Parser needs to create an adapter but 'getMethodInvokingAdapterClass()' returned null.");
BeanDefinitionBuilder builder = BeanDefinitionBuilder.genericBeanDefinition(adapterClass);
builder.addConstructorArgReference(ref);
builder.addConstructorArgValue(method);
String adapterBeanName = BeanDefinitionReaderUtils.generateBeanName(builder.getBeanDefinition(), parserContext.getRegistry());
String adapterBeanName = BeanDefinitionReaderUtils.generateBeanName(
builder.getBeanDefinition(), parserContext.getRegistry());
BeanDefinitionHolder holder = new BeanDefinitionHolder(builder.getBeanDefinition(), adapterBeanName);
parserContext.registerBeanComponent(new BeanComponentDefinition(holder));
return adapterBeanName;
@@ -125,8 +142,14 @@ public abstract class AbstractEndpointParser extends AbstractSingleBeanDefinitio
protected void postProcess(Element element, ParserContext parserContext, BeanDefinitionBuilder builder) {
}
/**
* Subclasses must override this if the adapted object is created from
* the "ref" and "method" attribute values.
*/
protected Class<?> getMethodInvokingAdapterClass() {
return null;
}
protected abstract Class<? extends MessageEndpoint> getEndpointClass();
protected abstract Class<?> getMethodInvokingAdapterClass();
}

55
org.springframework.integration/src/main/java/org/springframework/integration/transformer/config/AbstractPayloadTransformerParser.java
View File

@@ -1,55 +0,0 @@
/*
* Copyright 2002-2008 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.integration.transformer.config;
import org.w3c.dom.Element;
import org.springframework.beans.factory.support.BeanDefinitionBuilder;
import org.springframework.beans.factory.xml.AbstractSingleBeanDefinitionParser;
import org.springframework.beans.factory.xml.ParserContext;
import org.springframework.integration.transformer.AbstractPayloadTransformer;
/**
* @author Mark Fisher
*/
public abstract class AbstractPayloadTransformerParser extends AbstractSingleBeanDefinitionParser {
@Override
protected boolean shouldGenerateId() {
return false;
}
@Override
protected boolean shouldGenerateIdAsFallback() {
return true;
}
@Override
protected Class<?> getBeanClass(Element element) {
return this.getTransformerClass();
}
@Override
protected void doParse(Element element, ParserContext parserContext, BeanDefinitionBuilder builder) {
this.parsePayloadTransformer(element, parserContext, builder);
}
protected abstract Class<? extends AbstractPayloadTransformer<?, ?>> getTransformerClass();
protected abstract void parsePayloadTransformer(Element element, ParserContext parserContext, BeanDefinitionBuilder builder);
}

58
org.springframework.integration/src/main/java/org/springframework/integration/transformer/config/AbstractTransformerParser.java Normal file
View File

@@ -0,0 +1,58 @@
/*
* Copyright 2002-2008 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.integration.transformer.config;
import org.w3c.dom.Element;
import org.springframework.beans.factory.support.BeanDefinitionBuilder;
import org.springframework.beans.factory.support.BeanDefinitionReaderUtils;
import org.springframework.beans.factory.xml.ParserContext;
import org.springframework.integration.config.AbstractEndpointParser;
import org.springframework.integration.endpoint.MessageEndpoint;
import org.springframework.integration.transformer.Transformer;
import org.springframework.integration.transformer.TransformerEndpoint;
/**
* @author Mark Fisher
*/
public abstract class AbstractTransformerParser extends AbstractEndpointParser {
@Override
protected boolean requiresBeanReference() {
return false;
}
@Override
protected Class<? extends MessageEndpoint> getEndpointClass() {
return TransformerEndpoint.class;
}
@Override
protected void postProcess(Element element, ParserContext parserContext, BeanDefinitionBuilder builder) {
BeanDefinitionBuilder transformerBuilder =
BeanDefinitionBuilder.genericBeanDefinition(this.getTransformerClass());
this.parsePayloadTransformer(element, parserContext, transformerBuilder);
String transformerBeanName = BeanDefinitionReaderUtils.registerWithGeneratedName(
transformerBuilder.getBeanDefinition(), parserContext.getRegistry());
builder.addConstructorArgReference(transformerBeanName);
}
protected abstract Class<? extends Transformer> getTransformerClass();
protected abstract void parsePayloadTransformer(Element element, ParserContext parserContext, BeanDefinitionBuilder builder);
}