org.verapdf.parser.postscript

Class PSObject

java.lang.Object

org.verapdf.cos.COSObject

org.verapdf.parser.postscript.PSObject

Direct Known Subclasses:

PSLiteralObject, PSOperator, PSProcedure

public abstract class PSObject
extends COSObject

This is the base class for PostScript object.

Author:

Sergey Shemyakov

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	PSObject(COSBase base)

Method Summary

Modifier and Type	Method and Description
abstract void	execute(Stack<COSObject> operandStack, Map<ASAtom,COSObject> userDict) Executes PostScript object.
static PSObject	getPSObject(COSObject obj) Constructs PostScript object from COS object.
static PSObject	getPSObject(COSObject obj, boolean isExecutable)

Methods inherited from class org.verapdf.cos.COSObject

accept, add, assign, at, clear, clearArray, empty, equals, get, getBoolean, getBooleanKey, getData, getData, getDirect, getDirectBase, getDocument, getEmpty, getInteger, getIntegerKey, getKey, getKey, getKeySet, getName, getNameKey, getObjectKey, getReal, getRealKey, getRealStreamSize, getString, getStringKey, getType, getValues, insert, isEndOfObjectComplyPDFA, isEndstreamKeywordCRLFCompliant, isHeaderFormatComplyPDFA, isHeaderOfObjectComplyPDFA, isIndirect, isStreamKeywordCRLFCompliant, knownKey, mark, remove, removeKey, set, set, setArray, setArray, setArray, setArrayKey, setArrayKey, setArrayKey, setArrayKey, setBoolean, setBooleanKey, setData, setData, setDirect, setEndstreamKeywordCRLFCompliant, setInteger, setIntegerKey, setIsEndOfObjectComplyPDFA, setIsHeaderFormatComplyPDFA, setIsHeaderOfObjectComplyPDFA, setKey, setKey, setName, setNameKey, setObjectKey, setReal, setRealKey, setRealStreamSize, setStreamKeywordCRLFCompliant, setString, setString, setStringKey, size

Methods inherited from class java.lang.Object

clone, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

PSObject

protected PSObject(COSBase base)

Method Detail

execute

public abstract void execute(Stack<COSObject> operandStack,
                             Map<ASAtom,COSObject> userDict)
                      throws PostScriptException

Executes PostScript object. For literal objects this execution means pushing object to operand stack, for operator and procedure objects execution mean execution of this operator or procedure.

Parameters:

operandStack - is stack for PostScript operands (see PostScript specification for further information).

userDict - is a dictionary that stores all key-value associated pair encountered during PostScript parsing. Full PostScript parser needs a dict stack, our implementation has only one dictionary.

Throws:

PostScriptException

getPSObject

public static PSObject getPSObject(COSObject obj)

Constructs PostScript object from COS object.

getPSObject

public static PSObject getPSObject(COSObject obj,
                                   boolean isExecutable)