org.jpedal.objects.raw.PdfKeyPairsIterator Maven / Gradle / Ivy
/*
* ===========================================
* Java Pdf Extraction Decoding Access Library
* ===========================================
*
* Project Info: http://www.idrsolutions.com
* Help section for developers at http://www.idrsolutions.com/support/
*
* (C) Copyright 1997-2017 IDRsolutions and Contributors.
*
* This file is part of JPedal/JPDF2HTML5
*
@LICENSE@
*
* ---------------
* PdfKeyPairsIterator.java
* ---------------
*/
package org.jpedal.objects.raw;
import org.jpedal.utils.NumberUtils;
/**
* allow fast access to data from PDF object
*/
public class PdfKeyPairsIterator {
private final byte[][] keys, values;
int maxCount, current;
public PdfKeyPairsIterator(final byte[][] keys, final byte[][] values) {
this.keys = keys;
this.values = values;
if (keys != null) {
maxCount = keys.length;
}
current = 0;
}
/**
* number of PAIRS (or keys)
*
* @return
*/
public int getTokenCount() {
return maxCount;
}
/**
* roll onto next key and value
*/
public void nextPair() {
if (current < maxCount) {
current++;
} else {
throw new RuntimeException("No keys left in PdfKeyPairsIterator");
}
}
/**
* next key
*
* @return
*/
public String getNextKeyAsString() {
return new String(keys[current]);
}
/**
* used by CharProcs to return number or number of key (ie /12 or /A)
*
* @return
*/
public int getNextKeyAsNumber() {
final int length = keys[current].length;
final boolean isNumber = isNextKeyANumber();
if (!isNumber) {
if (keys[current].length != 1) {
if (1 == 1) {
throw new RuntimeException("Unexpected value in getNextKeyAsNumber >" + new String(keys[current]) + '<');
}
} else {
return (keys[current][0] & 255);
}
} else {
return NumberUtils.parseInt(0, length, keys[current]);
}
return -1;
}
public boolean isNextKeyANumber() {
final int length = keys[current].length;
boolean isNumber = true;
for (int ii = 0; ii < length; ii++) {
final int nextChar = keys[current][ii];
if (nextChar >= '0' && nextChar <= '9') {
} else {
isNumber = false;
ii = length;
}
}
return isNumber;
}
public boolean hasMorePairs() {
return current < maxCount;
}
public byte[] getNextValueAsBytes() {
if (values[current] == null) {
return null;
} else {
return values[current];
}
}
public String getNextValueAsString() {
if (values[current] == null) {
return null;
} else {
return new String(values[current]);
}
}
}