/hudson-core/src/main/java/hudson/cli/declarative/MethodBinder.java
http://github.com/hudson/hudson · Java · 148 lines · 88 code · 22 blank · 38 comment · 6 complexity · b149d5c3183c29ebe0570d2ede1fcbc1 MD5 · raw file
- /*
- * The MIT License
- *
- * Copyright (c) 2004-2009, Sun Microsystems, Inc.
- *
- * 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.cli.declarative;
- import hudson.util.ReflectionUtils;
- import hudson.util.ReflectionUtils.Parameter;
- import org.kohsuke.args4j.Argument;
- import org.kohsuke.args4j.CmdLineException;
- import org.kohsuke.args4j.CmdLineParser;
- import org.kohsuke.args4j.Option;
- import org.kohsuke.args4j.spi.Setter;
- import org.kohsuke.args4j.spi.OptionHandler;
- import java.lang.annotation.Annotation;
- import java.lang.reflect.InvocationTargetException;
- import java.lang.reflect.Method;
- import java.util.List;
- /**
- * Binds method parameters to CLI arguments and parameters via args4j.
- * Once the parser fills in the instance state, {@link #call(Object)}
- * can be used to invoke a method.
- *
- * @author Kohsuke Kawaguchi
- */
- class MethodBinder {
- private final Method method;
- private final Object[] arguments;
- /**
- * @param method
- */
- public MethodBinder(Method method, CmdLineParser parser) {
- this.method = method;
- List<Parameter> params = ReflectionUtils.getParameters(method);
- arguments = new Object[params.size()];
- // to work in cooperation with earlier arguments, add bias to all the ones that this one defines.
- final int bias = parser.getArguments().size();
- for (final Parameter p : params) {
- final int index = p.index();
- // TODO: collection and map support
- Setter setter = new Setter() {
- public void addValue(Object value) throws CmdLineException {
- arguments[index] = value;
- }
- public Class getType() {
- return p.type();
- }
- public boolean isMultiValued() {
- return false;
- }
- };
- Option option = p.annotation(Option.class);
- if (option!=null) {
- parser.addOption(setter,option);
- }
- Argument arg = p.annotation(Argument.class);
- if (arg!=null) {
- if (bias>0) arg = new ArgumentImpl(arg,bias);
- parser.addArgument(setter,arg);
- }
- if (p.type().isPrimitive())
- arguments[index] = ReflectionUtils.getVmDefaultValueForPrimitiveType(p.type());
- }
- }
- public Object call(Object instance) throws Exception {
- try {
- return method.invoke(instance,arguments);
- } catch (InvocationTargetException e) {
- Throwable t = e.getTargetException();
- if (t instanceof Exception)
- throw (Exception) t;
- throw e;
- }
- }
- /**
- * {@link Argument} implementation that adds a bias to {@link #index()}.
- */
- @SuppressWarnings({"ClassExplicitlyAnnotation"})
- private static final class ArgumentImpl implements Argument {
- private final Argument base;
- private final int bias;
- private ArgumentImpl(Argument base, int bias) {
- this.base = base;
- this.bias = bias;
- }
- public String usage() {
- return base.usage();
- }
- public String metaVar() {
- return base.metaVar();
- }
- public boolean required() {
- return base.required();
- }
- public Class<? extends OptionHandler> handler() {
- return base.handler();
- }
- public int index() {
- return base.index()+bias;
- }
- public boolean multiValued() {
- return base.multiValued();
- }
- public Class<? extends Annotation> annotationType() {
- return base.annotationType();
- }
- }
- }