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RaimondKempeesRaimondKempees
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Merge pull request #83 from dd4t/feature/thymeleaf
Added Thymeleaf support
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‎dd4t-thymeleaf-support/pom.xml‎

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<?xml version="1.0" encoding="UTF-8"?>
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<project xmlns="http://maven.apache.org/POM/4.0.0"
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xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
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<parent>
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<groupId>org.dd4t</groupId>
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<artifactId>dd4t-parent</artifactId>
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<version>2.0.7-SNAPSHOT</version>
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</parent>
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<modelVersion>4.0.0</modelVersion>
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<name>${project.groupId}:${project.artifactId}</name>
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<description>Provides support for Thymeleaf views.</description>
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<url>https://github.com/dd4t</url>
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<licenses>
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<license>
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<name>The Apache License, Version 2.0</name>
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<url>http://www.apache.org/licenses/LICENSE-2.0.txt</url>
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</license>
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</licenses>
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<developers>
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<developer>
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<name>Quirijn Slings</name>
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<email>[email protected]</email>
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<organization>DD4T</organization>
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<organizationUrl>https://github.com/dd4t</organizationUrl>
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</developer>
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<developer>
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<name>Raimond Kempees</name>
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<email>[email protected]</email>
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<organization>DD4T</organization>
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<organizationUrl>https://github.com/dd4t</organizationUrl>
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</developer>
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</developers>
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<scm>
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<connection>scm:git:[email protected]:/dd4t/dd4t-2-java.git</connection>
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<developerConnection>scm:git:[email protected]:/dd4t/dd4t-2-java.git</developerConnection>
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<url>[email protected]:/dd4t/dd4t-2-java.git</url>
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</scm>
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<packaging>jar</packaging>
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<properties>
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<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
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<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
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</properties>
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<build>
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<resources>
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<resource>
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<directory>src/main/resources</directory>
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<targetPath>META-INF/tld</targetPath>
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<filtering>true</filtering>
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<includes>
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<include>**/**</include>
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</includes>
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</resource>
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</resources>
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</build>
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<artifactId>dd4t-thymeleaf-support</artifactId>
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<dependencyManagement>
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<dependencies>
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<dependency>
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<groupId>org.dd4t</groupId>
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<artifactId>dd4t-bom</artifactId>
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<version>${project.version}</version>
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<type>pom</type>
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<scope>import</scope>
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</dependency>
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</dependencies>
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</dependencyManagement>
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<dependencies>
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<dependency>
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<groupId>org.dd4t</groupId>
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<artifactId>dd4t-api</artifactId>
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<version>${project.version}</version>
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</dependency>
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<dependency>
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<groupId>org.dd4t</groupId>
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<artifactId>dd4t-core</artifactId>
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<version>${project.version}</version>
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</dependency>
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<dependency>
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<groupId>org.dd4t</groupId>
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<artifactId>dd4t-databind</artifactId>
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<version>${project.version}</version>
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</dependency>
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<dependency>
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<groupId>org.dd4t</groupId>
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<artifactId>dd4t-mvc-support</artifactId>
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<version>${project.version}</version>
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</dependency>
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<dependency>
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<groupId>org.thymeleaf</groupId>
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<artifactId>thymeleaf-spring4</artifactId>
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<version>3.0.2.RELEASE</version>
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</dependency>
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<dependency>
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<groupId>org.slf4j</groupId>
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<artifactId>slf4j-api</artifactId>
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<scope>provided</scope>
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</dependency>
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<!--
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<dependency>
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<groupId>commons-io</groupId>
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<artifactId>commons-io</artifactId>
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<scope>provided</scope>
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</dependency>
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<dependency>
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<groupId>org.springframework</groupId>
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<artifactId>spring-beans</artifactId>
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<scope>provided</scope>
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</dependency>
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<dependency>
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<groupId>org.springframework</groupId>
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<artifactId>spring-context-support</artifactId>
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<scope>provided</scope>
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</dependency>
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<dependency>
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<groupId>org.springframework</groupId>
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<artifactId>spring-jms</artifactId>
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<scope>provided</scope>
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</dependency>
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<dependency>
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<groupId>org.springframework</groupId>
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<artifactId>spring-web</artifactId>
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<scope>provided</scope>
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</dependency>
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<dependency>
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<groupId>org.springframework</groupId>
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<artifactId>spring-webmvc</artifactId>
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<scope>provided</scope>
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</dependency>
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<dependency>
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<groupId>org.apache.commons</groupId>
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<artifactId>commons-lang3</artifactId>
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<scope>provided</scope>
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</dependency>
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<dependency>
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<groupId>org.apache.httpcomponents</groupId>
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<artifactId>httpclient</artifactId>
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<scope>provided</scope>
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</dependency>
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<dependency>
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<groupId>javax.servlet.jsp</groupId>
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<artifactId>jsp-api</artifactId>
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<scope>provided</scope>
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</dependency>
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<dependency>
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<groupId>javax.servlet</groupId>
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<artifactId>javax.servlet-api</artifactId>
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<scope>provided</scope>
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</dependency>
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<dependency>
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<groupId>joda-time</groupId>
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<artifactId>joda-time</artifactId>
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<scope>provided</scope>
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</dependency>
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-->
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<!-- https://mvnrepository.com/artifact/org.thymeleaf/thymeleaf-spring4 -->
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</dependencies>
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</project>

‎dd4t-thymeleaf-support/src/README.md‎

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Thymeleaf is a view language for java (see http://www.thymeleaf.org/).
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This library offers support for Experience Manager in Thymeleaf views.
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Usage:
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<xpm:page src="${page}"/>
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Place this somewhere near the bottom of the HTML page. Generates the <script> tag needed for XPM. Note that the DD4T Page object must be on the request (in this example, it is called 'page' but that can be different per implementation).
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<xpm:componentpresentation src="${entity}"/>
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Place this tag directly inside the enclosing element of the component presentation. Note that the DD4T entity (= ViewModel) object must be on the request (in this example, it is called 'entity' but that can be different per implementation).
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<xpm:field src="${entity}" fieldname="somefieldname"/>
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Place this tag directly inside the enclosing element of the field. Note that the DD4T entity (= ViewModel) object must be on the request (in this example, it is called 'entity' but that can be different per implementation).

‎dd4t-thymeleaf-support/src/main/java/org/dd4t/thymeleaf/dialect/XpmDialect.java‎

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package org.dd4t.thymeleaf.dialect;
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import java.util.HashSet;
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import java.util.Set;
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import javax.annotation.Resource;
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import org.dd4t.core.services.PropertiesService;
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import org.dd4t.thymeleaf.dialect.processor.xpm.XpmComponentPresentationProcessor;
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import org.dd4t.thymeleaf.dialect.processor.xpm.XpmFieldProcessor;
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import org.dd4t.thymeleaf.dialect.processor.xpm.XpmPageInitProcessor;
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import org.thymeleaf.dialect.IProcessorDialect;
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import org.thymeleaf.processor.IProcessor;
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public class XpmDialect implements IProcessorDialect {
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@Resource
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PropertiesService propertiesService;
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public XpmDialect() {
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}
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/**
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* Prefix of the dialect.
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*/
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@Override
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public String getPrefix() {
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return "xpm";
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}
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/**
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* Available processors
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*/
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@Override
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public Set<IProcessor> getProcessors(String dialectPrefix) {
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final Set<IProcessor> processors = new HashSet<IProcessor>();
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processors.add(new XpmPageInitProcessor(getPrefix(), propertiesService));
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processors.add(new XpmComponentPresentationProcessor(getPrefix(), propertiesService));
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processors.add(new XpmFieldProcessor(getPrefix(), propertiesService));
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return processors;
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}
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@Override
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public String getName() {
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return "XPM Dialect";
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}
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@Override
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public int getDialectProcessorPrecedence() {
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return 0;
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}
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}

‎dd4t-thymeleaf-support/src/main/java/org/dd4t/thymeleaf/dialect/processor/xpm/XpmComponentPresentationProcessor.java‎

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package org.dd4t.thymeleaf.dialect.processor.xpm;
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import java.util.Map;
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import java.util.logging.Logger;
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import org.dd4t.core.services.PropertiesService;
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import org.dd4t.databind.viewmodel.base.TridionViewModelBase;
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import org.dd4t.mvc.utils.XPMRenderer;
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import org.thymeleaf.IEngineConfiguration;
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import org.thymeleaf.context.ITemplateContext;
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import org.thymeleaf.model.IModel;
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import org.thymeleaf.model.IModelFactory;
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import org.thymeleaf.model.IProcessableElementTag;
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import org.thymeleaf.processor.element.AbstractElementTagProcessor;
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import org.thymeleaf.processor.element.IElementTagStructureHandler;
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import org.thymeleaf.standard.expression.IStandardExpression;
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import org.thymeleaf.standard.expression.IStandardExpressionParser;
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import org.thymeleaf.standard.expression.StandardExpressions;
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import org.thymeleaf.templatemode.TemplateMode;
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/**
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* Custom processor that generates the Experience Manager tags on the page level
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* @author Quirijn Slings
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*/
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public class XpmComponentPresentationProcessor extends AbstractElementTagProcessor {
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private static final Logger LOG = Logger.getLogger(XpmComponentPresentationProcessor.class.getName());
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private static final String TAG_NAME = "componentpresentation";
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private static final String SRC_ATTR_NAME = "src";
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private static final int PRECEDENCE = 10000;
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public XpmComponentPresentationProcessor(final String dialectPrefix, PropertiesService propertiesService) {
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super(TemplateMode.HTML,
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dialectPrefix,
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TAG_NAME,
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true,
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null,
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false,
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PRECEDENCE
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);
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String xpmEnabledAsString = propertiesService.getProperty("xpm.enabled");
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if (xpmEnabledAsString != null) {
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XPMRenderer.getInstance().setEnabled(Boolean.parseBoolean(xpmEnabledAsString));
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}
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}
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/**
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* Process the tag
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*/
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@Override
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protected void doProcess(
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final ITemplateContext context, final IProcessableElementTag tag,
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final IElementTagStructureHandler structureHandler) {
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final IEngineConfiguration configuration = context.getConfiguration();
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final IStandardExpressionParser parser = StandardExpressions.getExpressionParser(configuration);
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// check if there is a 'src' attribute on the current tag
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if (! tag.hasAttribute(SRC_ATTR_NAME)) {
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// TODO: log a warning message
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return;
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}
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// retrieve the entity object from the attribute
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IStandardExpression expressionComponentPresentation = parser.parseExpression(context, tag.getAttributeValue(SRC_ATTR_NAME));
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TridionViewModelBase entity = (TridionViewModelBase) expressionComponentPresentation.execute(context);
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Map<String,Object> props = entity.getModelProperties();
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// get an XPM renderer (part of DD4T) and generate the XPM comment for this page
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XPMRenderer renderer = XPMRenderer.getInstance();
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String xpmMarkup = renderer.componentPresentation(entity.getTcmUri().toString(), entity.getLastModified(), entity.getTemplateUri().toString(), false);
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// create a model with the returned markup
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final IModelFactory modelFactory = context.getModelFactory();
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final IModel model = modelFactory.parse(context.getTemplateData(), xpmMarkup);
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// instruct the engine to replace this entire element with the specified model
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structureHandler.replaceWith(model, false);
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}
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}

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