有没有人想通过提供一个清晰的例子来回答我在这里链接的问题how-to-pass-a-typed-collection-from-clojure-to- java堆？
问问题
385 次
2 回答
1
只需传递一个原始（无类型）集合。您实际上并不需要关心类型 - 它们只是一个编译器技巧并且在运行时被丢弃。
于 2010-09-22T13:54:46.720 回答
0
从 Chas Emerick 对我最初的问题的回答中，我设置了这个小型 maven 项目：
interop ---- domainobjects ---- IFoo.java
---- TypedObject.java
---- pom.xml
---- functional ---- fooimpl.clj
---- pom.xml
---- consumer ---- JavaConsumer.java
---- JavaConsumerTest.groovy
---- pom.xml
---- pom.xml
######################################################################################
package com.tobeconsumed.byjava;
import java.util.List;
public interface IFoo {
List<TypedObject> createListOfTypedObjects(String message);
}
package com.tobeconsumed.byjava;
public class TypedObject {
private String property;
public String getProperty() {
return property;
}
public void setProperty(String property) {
this.property = property;
}
}
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<artifactId>interop</artifactId>
<groupId>interop</groupId>
<version>0.0.1-SNAPSHOT</version>
</parent>
<groupId>interop</groupId>
<artifactId>domainobjects</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>domainobjects</name>
<description>Contains all of the domain objects.</description>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.8.1</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.codehaus.groovy</groupId>
<artifactId>groovy-all</artifactId>
<version>1.7.4</version>
</dependency>
</dependencies>
<build>
<finalName>domainobjects</finalName>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>2.3.1</version>
<configuration>
<source>1.6</source>
<target>1.6</target>
<project>
<build>
<scriptSourceDirectory>src/main/java</scriptSourceDirectory>
<testSourceDirectory>src/test/java</testSourceDirectory>
</build>
</project>
</configuration>
<executions>
<execution>
<id>compile</id>
<phase>compile</phase>
<goals>
<goal>compile</goal>
</goals>
</execution>
<execution>
<id>test-java</id>
<phase>test</phase>
<goals>
<goal>testCompile</goal>
</goals>
</execution>
</executions>
</plugin>
<plugin>
<groupId>org.codehaus.gmaven</groupId>
<artifactId>gmaven-plugin</artifactId>
<version>1.2</version>
<extensions>true</extensions>
<configuration>
<project>
<build>
<sourceDirectory>src/main/groovy</sourceDirectory>
<testSourceDirectory>src/test/groovy</testSourceDirectory>
</build>
</project>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-antrun-plugin</artifactId>
<executions>
<execution>
<id>compile</id>
<phase>compile</phase>
<configuration>
<tasks>
<mkdir dir="${basedir}/src/main/groovy"/>
<taskdef name="groovyc"
classname="org.codehaus.groovy.ant.Groovyc">
<classpath refid="maven.compile.classpath"/>
</taskdef>
<mkdir dir="${project.build.outputDirectory}"/>
<groovyc destdir="${project.build.outputDirectory}"
srcdir="${basedir}/src/main/groovy/" listfiles="true">
<classpath refid="maven.compile.classpath"/>
</groovyc>
</tasks>
</configuration>
<goals>
<goal>run</goal>
</goals>
</execution>
<execution>
<id>test-compile</id>
<phase>test-compile</phase>
<configuration>
<tasks>
<mkdir dir="${basedir}/src/test/groovy"/>
<taskdef name="groovyc"
classname="org.codehaus.groovy.ant.Groovyc">
<classpath refid="maven.compile.classpath"/>
</taskdef>
<mkdir dir="${project.build.testOutputDirectory}"/>
<groovyc destdir="${project.build.testOutputDirectory}"
srcdir="${basedir}/src/test/groovy/" listfiles="true">
<classpath refid="maven.test.classpath"/>
</groovyc>
</tasks>
</configuration>
<goals>
<goal>run</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>
</project>
######################################################################################
(ns com.tobeconsumed.byjava.fooimpl
(:import com.tobeconsumed.byjava.IFoo)
(:gen-class
:implements [com.tobeconsumed.byjava.IFoo]))
(defn -createListOfTypedObjects
"Creates and returns a list of TypedObjects"
[this message]
(println message)
[(TypedObject.), (TypedObject.), (TypedObject.), (TypedObject.)])
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<artifactId>interop</artifactId>
<groupId>interop</groupId>
<version>0.0.1-SNAPSHOT</version>
</parent>
<groupId>interop</groupId>
<artifactId>functional</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>functional</name>
<description>Some functional code.</description>
<repositories>
<repository>
<id>clojars</id>
<url>http://clojars.org/repo/</url>
</repository>
<repository>
<id>clojure-releases</id>
<url>http://build.clojure.org/releases</url>
</repository>
<repository>
<id>clojure-snapshots</id>
<url>http://build.clojure.org/snapshots</url>
</repository>
<repository>
<id>central</id>
<url>http://repo1.maven.org/maven2</url>
</repository>
</repositories>
<dependencies>
<dependency>
<groupId>interop</groupId>
<artifactId>domainobjects</artifactId>
<version>0.0.1-SNAPSHOT</version>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>org.clojure</groupId>
<artifactId>clojure</artifactId>
<version>1.2.0</version>
<type>pom</type>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>org.clojure</groupId>
<artifactId>clojure-contrib</artifactId>
<version>1.2.0</version>
<type>pom</type>
<scope>compile</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>com.theoryinpractise</groupId>
<artifactId>clojure-maven-plugin</artifactId>
<version>1.3.3</version>
<configuration>
<project>
<build>
<sourceDirectory>src/main/clojure</sourceDirectory>
<testSourceDirectory>src/test/clojure</testSourceDirectory>
</build>
</project>
</configuration>
<executions>
<execution>
<id>compile</id>
<phase>compile</phase>
<goals>
<goal>compile</goal>
</goals>
</execution>
<execution>
<id>test-clojure</id>
<phase>test</phase>
<goals>
<goal>test</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>
</project>
######################################################################################
package consumer;
import java.util.List;
import com.tobeconsumed.byjava.IFoo;
import com.tobeconsumed.byjava.TypedObject;
import com.tobeconsumed.byjava.fooimpl;
public class JavaConsumer {
public List<TypedObject> callCreateListOfTypedObjects() {
IFoo foo = new fooimpl();
List<TypedObject> listOfTypedObject = foo.createListOfTypedObjects("Returning typed a list");
return listOfTypedObject;
}
}
package consumer;
import junit.framework.TestCase;
public class JavaConsumerTest extends TestCase {
private JavaConsumer javaConsumer;
protected void setUp() throws Exception {
javaConsumer = new JavaConsumer();
super.setUp();
}
protected void tearDown() throws Exception {
javaConsumer = null;
super.tearDown();
}
public void testCallShowMessage() {
assertNotNull(javaConsumer);
def result = javaConsumer.callCreateListOfTypedObjects();
assert 4 == result.size()
}
}
<?xml version="1.0"?>
<project xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd" xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<modelVersion>4.0.0</modelVersion>
<parent>
<artifactId>interop</artifactId>
<groupId>interop</groupId>
<version>0.0.1-SNAPSHOT</version>
</parent>
<groupId>interop</groupId>
<artifactId>consumer</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>war</packaging>
<name>consumer</name>
<url>http://maven.apache.org</url>
<dependencies>
<dependency>
<groupId>interop</groupId>
<artifactId>functional</artifactId>
<version>0.0.1-SNAPSHOT</version>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>interop</groupId>
<artifactId>domainobjects</artifactId>
<version>0.0.1-SNAPSHOT</version>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.8.1</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.codehaus.groovy</groupId>
<artifactId>groovy-all</artifactId>
<version>1.7.4</version>
</dependency>
</dependencies>
<build>
<finalName>consumer</finalName>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>2.3.1</version>
<configuration>
<source>1.6</source>
<target>1.6</target>
<project>
<build>
<scriptSourceDirectory>src/main/java</scriptSourceDirectory>
<testSourceDirectory>src/test/java</testSourceDirectory>
</build>
</project>
</configuration>
<executions>
<execution>
<id>compile</id>
<phase>compile</phase>
<goals>
<goal>compile</goal>
</goals>
</execution>
<execution>
<id>test-java</id>
<phase>test</phase>
<goals>
<goal>testCompile</goal>
</goals>
</execution>
</executions>
</plugin>
<plugin>
<groupId>org.codehaus.gmaven</groupId>
<artifactId>gmaven-plugin</artifactId>
<version>1.2</version>
<extensions>true</extensions>
<configuration>
<project>
<build>
<sourceDirectory>src/main/groovy</sourceDirectory>
<testSourceDirectory>src/test/groovy</testSourceDirectory>
</build>
</project>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-antrun-plugin</artifactId>
<executions>
<execution>
<id>compile</id>
<phase>compile</phase>
<configuration>
<tasks>
<mkdir dir="${basedir}/src/main/groovy"/>
<taskdef name="groovyc"
classname="org.codehaus.groovy.ant.Groovyc">
<classpath refid="maven.compile.classpath"/>
</taskdef>
<mkdir dir="${project.build.outputDirectory}"/>
<groovyc destdir="${project.build.outputDirectory}"
srcdir="${basedir}/src/main/groovy/" listfiles="true">
<classpath refid="maven.compile.classpath"/>
</groovyc>
</tasks>
</configuration>
<goals>
<goal>run</goal>
</goals>
</execution>
<execution>
<id>test-compile</id>
<phase>test-compile</phase>
<configuration>
<tasks>
<mkdir dir="${basedir}/src/test/groovy"/>
<taskdef name="groovyc"
classname="org.codehaus.groovy.ant.Groovyc">
<classpath refid="maven.compile.classpath"/>
</taskdef>
<mkdir dir="${project.build.testOutputDirectory}"/>
<groovyc destdir="${project.build.testOutputDirectory}"
srcdir="${basedir}/src/test/groovy/" listfiles="true">
<classpath refid="maven.test.classpath"/>
</groovyc>
</tasks>
</configuration>
<goals>
<goal>run</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>
</project>
######################################################################################
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>interop</groupId>
<artifactId>interop</artifactId>
<packaging>pom</packaging>
<version>0.0.1-SNAPSHOT</version>
<name>interop</name>
<repositories>
<repository>
<id>central</id>
<url>http://repo1.maven.org/maven2</url>
</repository>
</repositories>
<dependencies>
</dependencies>
<build>
<plugins>
</plugins>
</build>
<modules>
<module>functional</module>
<module>consumer</module>
<module>domainobjects</module>
</modules>
</project>
于 2010-09-22T17:56:39.753 回答