/*
* The MIT License
*
* Copyright (c) 2004-2009, Sun Microsystems, Inc., Kohsuke Kawaguchi, Luca Domenico Milanesio, Tom Huybrechts
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
package hudson.model;
import hudson.DescriptorExtensionList;
import hudson.Extension;
import hudson.ExtensionPoint;
import hudson.AbortException;
import hudson.cli.CLICommand;
import hudson.util.DescriptorList;
import java.io.Serializable;
import java.io.IOException;
import jenkins.model.Jenkins;
import net.sf.json.JSONObject;
import org.kohsuke.stapler.StaplerRequest;
import org.kohsuke.stapler.export.Exported;
import org.kohsuke.stapler.export.ExportedBean;
/**
* Defines a parameter for a build.
*
* <p>
* In Hudson, a user can configure a job to require parameters for a build.
* For example, imagine a test job that takes the bits to be tested as a parameter.
*
* <p>
* The actual meaning and the purpose of parameters are entirely up to users, so
* what the concrete parameter implmentation is pluggable. Write subclasses
* in a plugin and put {@link Extension} on the descriptor to register them.
*
* <p>
* Three classes are used to model build parameters. First is the
* {@link ParameterDescriptor}, which tells Hudson what kind of implementations are
* available. From {@link ParameterDescriptor#newInstance(StaplerRequest, JSONObject)},
* Hudson creates {@link ParameterDefinition}s based on the job configuration.
* For example, if the user defines two string parameters "database-type" and
* "appserver-type", we'll get two {@link StringParameterDefinition} instances
* with their respective names.
*
* <p>
* When a job is configured with {@link ParameterDefinition} (or more precisely,
* {@link ParametersDefinitionProperty}, which in turns retains {@link ParameterDefinition}s),
* user would have to enter the values for the defined build parameters.
* The {@link #createValue(StaplerRequest, JSONObject)} method is used to convert this
* form submission into {@link ParameterValue} objects, which are then accessible
* during a build.
*
*
*
* <h2>Persistence</h2>
* <p>
* Instances of {@link ParameterDefinition}s are persisted into job <tt>config.xml</tt>
* through XStream.
*
*
* <h2>Assocaited Views</h2>
* <h4>config.jelly</h4>
* <p>
* {@link ParameterDefinition} class uses <tt>config.jelly</tt> to provide contribute a form
* fragment in the job configuration screen. Values entered there is fed back to
* {@link ParameterDescriptor#newInstance(StaplerRequest, JSONObject)} to create {@link ParameterDefinition}s.
*
* <h4>index.jelly</h4>
* The <tt>index.jelly</tt> view contributes a form fragment in the page where the user
* enters actual values of parameters for a build. The result of this form submission
* is then fed to {@link ParameterDefinition#createValue(StaplerRequest, JSONObject)} to
* create {@link ParameterValue}s.
*
* TODO: what Jelly pages does this object need for rendering UI?
* TODO: {@link ParameterValue} needs to have some mechanism to expose values to the build
* @see StringParameterDefinition
*/
@ExportedBean(defaultVisibility=3)
public abstract class ParameterDefinition implements
Describable<ParameterDefinition>, ExtensionPoint, Serializable {
private final String name;
private final String description;
public ParameterDefinition(String name) {
this(name, null);
}
public ParameterDefinition(String name, String description) {
this.name = name;
this.description = description;
}
/**
* Create a new instance of this parameter definition and use the passed
* parameter value as the default value.
*
* @since 1.405
*/
public ParameterDefinition copyWithDefaultValue(ParameterValue defaultValue) {
// By default, just return this again
return this;
}
@Exported
public String getType() {
return this.getClass().getSimpleName();
}
@Exported
public String getName() {
return name;
}
@Exported
public String getDescription() {
return description;
}
/**
* {@inheritDoc}
*/
public ParameterDescriptor getDescriptor() {
return (ParameterDescriptor) Jenkins.getInstance().getDescriptorOrDie(getClass());
}
/**
* Create a parameter value from a form submission.
*
* <p>
* This method is invoked when the user fills in the parameter values in the HTML form
* and submits it to the server.
*/
public abstract ParameterValue createValue(StaplerRequest req, JSONObject jo);
/**
* Create a parameter value from a GET with query string.
* If no value is available in the request, it returns a default value if possible, or null.
*
* <p>
* Unlike {@link #createValue(StaplerRequest, JSONObject)}, this method is intended to support
* the programmatic POST-ing of the build URL. This form is less expressive (as it doesn't support
* the tree form), but it's more scriptable.
*
* <p>
* If a {@link ParameterDefinition} can't really support this mode of creating a value,
* you may just always return null.
*
* @throws IllegalStateException
* If the parameter is deemed required but was missing in the submission.
*/
public abstract ParameterValue createValue(StaplerRequest req);
/**
* Create a parameter value from the string given in the CLI.
*
* @param command
* This is the command that got the parameter. You can use its {@link CLICommand#checkChannel()}
* for interacting with the CLI JVM.
* @throws AbortException
* If the CLI processing should be aborted. Hudson will report the error message
* without stack trace, and then exits this command. Useful for graceful termination.
* @throws Exception
* All the other exceptions cause the stack trace to be dumped, and then
* the command exits with an error code.
* @since 1.334
*/
public ParameterValue createValue(CLICommand command, String value) throws IOException, InterruptedException {
throw new AbortException("CLI parameter submission is not supported for the "+getClass()+" type. Please file a bug report for this");
}
/**
* Returns default parameter value for this definition.
*
* @return default parameter value or null if no defaults are available
* @since 1.253
*/
@Exported
public ParameterValue getDefaultParameterValue() {
return null;
}
/**
* Returns all the registered {@link ParameterDefinition} descriptors.
*/
public static DescriptorExtensionList<ParameterDefinition,ParameterDescriptor> all() {
return Jenkins.getInstance().<ParameterDefinition,ParameterDescriptor>getDescriptorList(ParameterDefinition.class);
}
/**
* A list of available parameter definition types
* @deprecated as of 1.286
* Use {@link #all()} for read access, and {@link Extension} for registration.
*/
public static final DescriptorList<ParameterDefinition> LIST = new DescriptorList<ParameterDefinition>(ParameterDefinition.class);
public abstract static class ParameterDescriptor extends
Descriptor<ParameterDefinition> {
protected ParameterDescriptor(Class<? extends ParameterDefinition> klazz) {
super(klazz);
}
/**
* Infers the type of the corresponding {@link ParameterDescriptor} from the outer class.
* This version works when you follow the common convention, where a descriptor
* is written as the static nested class of the describable class.
*
* @since 1.278
*/
protected ParameterDescriptor() {
}
public String getValuePage() {
return getViewPage(clazz, "index.jelly");
}
@Override
public String getDisplayName() {
return "Parameter";
}
}
}