Package org.apache.tools.ant.types.resources

# Class JavaConstantResource

java.lang.Object
org.apache.tools.ant.ProjectComponent
org.apache.tools.ant.types.DataType
org.apache.tools.ant.types.Resource
org.apache.tools.ant.types.resources.AbstractClasspathResource
org.apache.tools.ant.types.resources.JavaConstantResource

All Implemented Interfaces:
  `java.lang.Cloneable`, `java.lang.Comparable<Resource>`, `java.lang.Iterable<Resource>`, `ResourceCollection`

    public class JavaConstantResource
    extends AbstractClasspathResource

A resource that is a java constant. This lets you extract values off the classpath and use them elsewhere

Since:
  Ant 1.7

## Nested Class Summary

## Nested classes/interfaces inherited from class org.apache.tools.ant.types.resources.AbstractClasspathResource

`AbstractClasspathResource.ClassLoaderWithFlag`

## Field Summary

### Fields inherited from class org.apache.tools.ant.types.Resource

`MAGIC, UNKNOWN_DATETIME, UNKNOWN_SIZE`

### Fields inherited from class org.apache.tools.ant.types.DataType

`checked, ref`

### Fields inherited from class org.apache.tools.ant.ProjectComponent

`description, location, project`

## Constructor Summary

Constructors
Constructor | Description
--- | ---
`JavaConstantResource()` |

## Method Summary

Modifier and Type | Method | Description
--- | --- | ---
`protected java.io.InputStream` | `openInputStream​(java.lang.ClassLoader cl)` | open the input stream from a specific classloader

### Methods inherited from class org.apache.tools.ant.types.resources.AbstractClasspathResource

`createClasspath, dieOnCircularReference, getClassLoader, getClasspath, getInputStream, getLoader, getRef, isExists, setClasspath, setClasspathRef, setLoaderRef, setParentFirst, setRefid`

### Methods inherited from class org.apache.tools.ant.types.Resource

`as, asOptional, clone, compareTo, equals, getLastModified, getMagicNumber, getName, getOutputStream, getSize, hashCode, isDirectory, isFilesystemOnly, iterator, setDirectory, setExists, setLastModified, setName, setSize, size, toLongString, toString`

### Methods inherited from class org.apache.tools.ant.types.DataType

`checkAttributesAllowed, checkChildrenAllowed, circularReference, dieOnCircularReference, dieOnCircularReference, getCheckedRef, getCheckedRef, getCheckedRef, getCheckedRef, getCheckedRef, getDataTypeName, getRefid, invokeCircularReferenceCheck, isChecked, isReference, noChildrenAllowed, pushAndInvokeCircularReferenceCheck, setChecked, tooManyAttributes`

### Methods inherited from class org.apache.tools.ant.ProjectComponent

`getDescription, getLocation, getProject, log, log, setDescription, setLocation, setProject`

### Methods inherited from class java.lang.Object

`finalize, getClass, notify, notifyAll, wait, wait, wait`

### Methods inherited from interface java.lang.Iterable

`forEach, spliterator`

### Methods inherited from interface org.apache.tools.ant.types.ResourceCollection

`isEmpty, stream`

## Constructor Details

### JavaConstantResource

public JavaConstantResource()

## Method Details

### openInputStream

protected java.io.InputStream openInputStream​(java.lang.ClassLoader cl) throws java.io.IOException
open the input stream from a specific classloader

Specified by:
  `openInputStream` in class `AbstractClasspathResource`
Parameters:
  `cl` - the classloader to use. Will be null if the system classloader is used
Returns:
  an open input stream for the resource
Throws:
  `java.io.IOException` - if an error occurs.