Many resources are needed to download a project. Please understand that we have to compensate our server costs. Thank you in advance. Project price only 1 $
You can buy this project and download/modify it how often you want.
/*
* Copyright 2003-2007 the original author or authors.
*
* Licensed 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 groovy.lang;
import org.codehaus.groovy.ast.expr.ArgumentListExpression;
import org.codehaus.groovy.control.CompilationFailedException;
import org.codehaus.groovy.runtime.DefaultGroovyMethods;
import org.codehaus.groovy.runtime.InvokerHelper;
import java.io.File;
import java.io.IOException;
/**
* This object represents a Groovy script
*
* @author James Strachan
* @author Guillaume Laforge
* @version $Revision$
*/
public abstract class Script extends GroovyObjectSupport {
private Binding binding;
protected Script() {
this(new Binding());
}
protected Script(Binding binding) {
this.binding = binding;
}
public Binding getBinding() {
return binding;
}
public void setBinding(Binding binding) {
this.binding = binding;
}
public Object getProperty(String property) {
try {
return binding.getVariable(property);
} catch (MissingPropertyException e) {
return super.getProperty(property);
}
}
public void setProperty(String property, Object newValue) {
if ("binding".equals(property))
setBinding((Binding) newValue);
else if("metaClass".equals(property))
setMetaClass((MetaClass)newValue);
else
binding.setVariable(property, newValue);
}
/**
* Invoke a method (or closure in the binding) defined.
*
* @param name method to call
* @param args arguments to pass to the method
* @return value
*/
public Object invokeMethod(String name, Object args) {
try {
return super.invokeMethod(name, args);
}
// if the method was not found in the current scope (the script's methods)
// let's try to see if there's a method closure with the same name in the binding
catch (MissingMethodException mme) {
try {
if (name.equals(mme.getMethod())) {
Object boundClosure = binding.getVariable(name);
if (boundClosure != null && boundClosure instanceof Closure) {
return ((Closure) boundClosure).call((Object[])args);
} else {
throw mme;
}
} else {
throw mme;
}
} catch (MissingPropertyException mpe) {
throw mme;
}
}
}
/**
* The main instance method of a script which has variables in scope
* as defined by the current {@link Binding} instance.
*/
public abstract Object run();
// println helper methods
/**
* Prints a newline to the current 'out' variable which should be a PrintWriter
* or at least have a println() method defined on it.
* If there is no 'out' property then print to standard out.
*/
public void println() {
Object object;
try {
object = getProperty("out");
} catch (MissingPropertyException e) {
System.out.println();
return;
}
InvokerHelper.invokeMethod(object, "println", ArgumentListExpression.EMPTY_ARRAY);
}
/**
* Prints the value to the current 'out' variable which should be a PrintWriter
* or at least have a print() method defined on it.
* If there is no 'out' property then print to standard out.
*/
public void print(Object value) {
Object object;
try {
object = getProperty("out");
} catch (MissingPropertyException e) {
DefaultGroovyMethods.print(System.out,value);
return;
}
InvokerHelper.invokeMethod(object, "print", new Object[]{value});
}
/**
* Prints the value and a newline to the current 'out' variable which should be a PrintWriter
* or at least have a println() method defined on it.
* If there is no 'out' property then print to standard out.
*/
public void println(Object value) {
Object object;
try {
object = getProperty("out");
} catch (MissingPropertyException e) {
DefaultGroovyMethods.println(System.out,value);
return;
}
InvokerHelper.invokeMethod(object, "println", new Object[]{value});
}
/**
* Prints a formatted string using the specified format string and argument.
*
* @param format the format to follow
* @param value the value to be formatted
*/
public void printf(String format, Object value) {
Object object;
try {
object = getProperty("out");
} catch (MissingPropertyException e) {
DefaultGroovyMethods.printf(System.out, format, value);
return;
}
InvokerHelper.invokeMethod(object, "printf", new Object[] { format, value });
}
/**
* Prints a formatted string using the specified format string and arguments.
*
* @param format the format to follow
* @param values an array of values to be formatted
*/
public void printf(String format, Object[] values) {
Object object;
try {
object = getProperty("out");
} catch (MissingPropertyException e) {
DefaultGroovyMethods.printf(System.out, format, values);
return;
}
InvokerHelper.invokeMethod(object, "printf", new Object[] { format, values });
}
/**
* A helper method to allow the dynamic evaluation of groovy expressions using this
* scripts binding as the variable scope
*
* @param expression is the Groovy script expression to evaluate
*/
public Object evaluate(String expression) throws CompilationFailedException {
GroovyShell shell = new GroovyShell(getClass().getClassLoader(), binding);
return shell.evaluate(expression);
}
/**
* A helper method to allow the dynamic evaluation of groovy expressions using this
* scripts binding as the variable scope
*
* @param file is the Groovy script to evaluate
*/
public Object evaluate(File file) throws CompilationFailedException, IOException {
GroovyShell shell = new GroovyShell(getClass().getClassLoader(), binding);
return shell.evaluate(file);
}
/**
* A helper method to allow scripts to be run taking command line arguments
*/
public void run(File file, String[] arguments) throws CompilationFailedException, IOException {
GroovyShell shell = new GroovyShell(getClass().getClassLoader(), binding);
shell.run(file, arguments);
}
}
