Class AbstractClasspathResource
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
- All Implemented Interfaces:
java.lang.Cloneable
,java.lang.Comparable<Resource>
,java.lang.Iterable<Resource>
,ResourceCollection
- Direct Known Subclasses:
JavaConstantResource
,JavaResource
public abstract class AbstractClasspathResource extends Resource
A Resource representation of anything that is accessed via a Java classloader.
The core methods to set/resolve the classpath are provided.
- Since:
- Ant 1.8.0
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Nested Class Summary
Nested Classes Modifier and Type Class Description static class
AbstractClasspathResource.ClassLoaderWithFlag
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Field Summary
Fields inherited from class org.apache.tools.ant.types.Resource
MAGIC, UNKNOWN_DATETIME, UNKNOWN_SIZE
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Constructor Summary
Constructors Constructor Description AbstractClasspathResource()
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Method Summary
Modifier and Type Method Description Path
createClasspath()
Add a classpath to use when looking up a resource.protected void
dieOnCircularReference(java.util.Stack<java.lang.Object> stk, Project p)
Check to see whether any DataType we hold references to is included in the Stack (which holds all DataType instances that directly or indirectly reference this instance, including this instance itself).protected AbstractClasspathResource.ClassLoaderWithFlag
getClassLoader()
combines the various ways that could specify a ClassLoader and potentially creates one that needs to be cleaned up when it is no longer needed so that classes can get garbage collected.Path
getClasspath()
get the classpath used by thisLoadProperties
.java.io.InputStream
getInputStream()
Return an InputStream for reading the contents of this Resource.Reference
getLoader()
Get the loader.protected AbstractClasspathResource
getRef()
Perform the check for circular references and return the referenced Resource.boolean
isExists()
Learn whether this resource exists.protected abstract java.io.InputStream
openInputStream(java.lang.ClassLoader cl)
open the input stream from a specific classloadervoid
setClasspath(Path classpath)
Set the classpath to use when looking up a resource.void
setClasspathRef(Reference r)
Set the classpath to use when looking up a resource, given as reference to a <path> defined elsewherevoid
setLoaderRef(Reference r)
Use the reference to locate the loader.void
setParentFirst(boolean b)
Whether to consult the parent classloader first.void
setRefid(Reference r)
Overrides the super version.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
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Constructor Details
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AbstractClasspathResource
public AbstractClasspathResource()
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Method Details
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setClasspath
Set the classpath to use when looking up a resource.- Parameters:
classpath
- to add to any existing classpath
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createClasspath
Add a classpath to use when looking up a resource.- Returns:
- The classpath to be configured
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setClasspathRef
Set the classpath to use when looking up a resource, given as reference to a <path> defined elsewhere- Parameters:
r
- The reference value
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getClasspath
get the classpath used by thisLoadProperties
.- Returns:
- The classpath
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getLoader
Get the loader.- Returns:
- the loader.
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setLoaderRef
Use the reference to locate the loader. If the loader is not found, taskdef will use the specified classpath and register it with the specified name.This allow multiple taskdef/typedef to use the same class loader, so they can be used together. It eliminate the need to put them in the CLASSPATH.
- Parameters:
r
- the reference to locate the loader.
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setParentFirst
public void setParentFirst(boolean b)Whether to consult the parent classloader first.Only relevant if a classpath has been specified.
- Parameters:
b
- boolean- Since:
- Ant 1.8.0
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setRefid
Overrides the super version. -
isExists
public boolean isExists()Learn whether this resource exists. This implementation opens the input stream as the test. -
getInputStream
public java.io.InputStream getInputStream() throws java.io.IOExceptionReturn an InputStream for reading the contents of this Resource.- Overrides:
getInputStream
in classResource
- Returns:
- an InputStream object.
- Throws:
java.io.IOException
- if an error occurs.
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getClassLoader
combines the various ways that could specify a ClassLoader and potentially creates one that needs to be cleaned up when it is no longer needed so that classes can get garbage collected.- Returns:
- ClassLoaderWithFlag
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openInputStream
protected abstract java.io.InputStream openInputStream(java.lang.ClassLoader cl) throws java.io.IOExceptionopen the input stream from a specific classloader- 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.
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dieOnCircularReference
Description copied from class:DataType
Check to see whether any DataType we hold references to is included in the Stack (which holds all DataType instances that directly or indirectly reference this instance, including this instance itself).If one is included, throw a BuildException created by
circularReference
.This implementation is appropriate only for a DataType that cannot hold other DataTypes as children.
The general contract of this method is that it shouldn't do anything if
DataType.checked
is true and set it to true on exit.- Overrides:
dieOnCircularReference
in classDataType
- Parameters:
stk
- the stack of references to check.p
- the project to use to dereference the references.
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getRef
Description copied from class:Resource
Perform the check for circular references and return the referenced Resource.
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