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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.apache.tools.ant.types.spi;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStreamWriter;
import java.io.Writer;
import java.util.ArrayList;
import java.util.List;
import org.apache.tools.ant.BuildException;
import org.apache.tools.ant.ProjectComponent;
/**
* ANT Jar-Task SPI extension
*
* @see <a href="http://issues.apache.org/bugzilla/show_bug.cgi?id=31520">
* http://issues.apache.org/bugzilla/show_bug.cgi?id=31520</a>
*/
public class Service extends ProjectComponent {
private List<Provider> providerList = new ArrayList<Provider>();
private String type;
/**
* Set the provider classname.
* @param className the classname of a provider of this service.
*/
public void setProvider(String className) {
Provider provider = new Provider();
provider.setClassName(className);
providerList.add(provider);
}
/**
* Add a nested provider element.
* @param provider a provider element.
*/
public void addConfiguredProvider(Provider provider) {
provider.check();
providerList.add(provider);
}
/**
* @return the service type.
*/
public String getType() {
return type;
}
/**
* Set the service type.
* @param type the service type, a classname of
* an interface or a class (normally
* abstract).
*/
public void setType(String type) {
this.type = type;
}
/**
* Return the implementations of this
* services as an inputstream.
* @return an inputstream of the classname names
* encoded as UTF-8.
* @throws IOException if there is an error.
*/
public InputStream getAsStream() throws IOException {
ByteArrayOutputStream arrayOut = new ByteArrayOutputStream();
Writer writer = new OutputStreamWriter(arrayOut, "UTF-8");
for (Provider provider : providerList) {
writer.write(provider.getClassName());
writer.write("\n");
}
writer.close();
return new ByteArrayInputStream(arrayOut.toByteArray());
}
/**
* Check if this object is configured correctly as a nested
* element.
*/
public void check() {
if (type == null) {
throw new BuildException(
"type attribute must be set for service element",
getLocation());
}
if (type.length() == 0) {
throw new BuildException(
"Invalid empty type classname", getLocation());
}
if (providerList.size() == 0) {
throw new BuildException(
"provider attribute or nested provider element must be set!",
getLocation());
}
}
}
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