Package com.pd4ml.pdf.cos.path

Class COSPathEvaluator

java.lang.Object

com.pd4ml.pdf.cos.path.COSPathEvaluator

public final class COSPathEvaluator
extends java.lang.Object

Resolves a COSPath against a COSDocument (or an arbitrary starting COSBase node), auto-dereferencing indirect references at every step so callers never see a bare COSObject.

Two evaluation styles are offered: the lenient evaluate(...) methods return COSNull.NULL for any path that can't be followed to the end (a missing key, an out-of-range index, a step applied to the wrong kind of node), which is usually the more convenient behavior for exploratory lookups; the evaluateStrict(...) methods instead throw a COSPathException that names exactly which step failed and why.

Method Summary

Modifier and Type	Method	Description
static COSBase	evaluate(COSDocument document, COSPath path)
static COSBase	evaluate(COSDocument document, java.lang.String pathExpression)
static COSBase	evaluateFrom(COSBase startNode, java.util.List<COSPathSegment> segments)
static COSBase	evaluateFromStrict(COSBase startNode, java.util.List<COSPathSegment> segments)
static COSBase	evaluateStrict(COSDocument document, COSPath path)
static COSBase	evaluateStrict(COSDocument document, java.lang.String pathExpression)

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

evaluate

public static COSBase evaluate(COSDocument document,
                               java.lang.String pathExpression)
                        throws COSPathException

Throws:

COSPathException

evaluate

public static COSBase evaluate(COSDocument document,
                               COSPath path)

evaluateFrom

public static COSBase evaluateFrom(COSBase startNode,
                                   java.util.List<COSPathSegment> segments)

evaluateStrict

public static COSBase evaluateStrict(COSDocument document,
                                     java.lang.String pathExpression)
                              throws COSPathException

Throws:

COSPathException

evaluateStrict

public static COSBase evaluateStrict(COSDocument document,
                                     COSPath path)
                              throws COSPathException

Throws:

COSPathException

evaluateFromStrict

public static COSBase evaluateFromStrict(COSBase startNode,
                                         java.util.List<COSPathSegment> segments)
                                  throws COSPathException

Throws:

COSPathException