xpathmatcher.java

来自「JAVA 所有包」· Java 代码 · 共 520 行 · 第 1/2 页

            boolean sawDescendant = fCurrentStep[i] > descendantStep;
            if (fCurrentStep[i] == steps.length) {
                if (DEBUG_MATCH) {
                    System.out.println(toString()+" XPath DIDN'T MATCH!");
                }
                fNoMatchDepth[i]++;
                if (DEBUG_MATCH) {
                    System.out.println(toString()+" [CHILD] after NO MATCH");
                }
                continue;
            }

            // match child::... step, if haven't consumed any self::node()
            if ((fCurrentStep[i] == startStep || fCurrentStep[i] > descendantStep) &&
                steps[fCurrentStep[i]].axis.type == XPath.Axis.CHILD) {
                XPath.Step step = steps[fCurrentStep[i]];
                XPath.NodeTest nodeTest = step.nodeTest;
                if (DEBUG_MATCH) {
                    System.out.println(toString()+" [CHILD] before");
                }
                if (nodeTest.type == XPath.NodeTest.QNAME) {
                    if (!nodeTest.name.equals(element)) {
                        if(fCurrentStep[i] > descendantStep) {
                            fCurrentStep[i] = descendantStep;
                            continue;
                        }
                        fNoMatchDepth[i]++;
                        if (DEBUG_MATCH) {
                            System.out.println(toString()+" [CHILD] after NO MATCH");
                        }
                        continue;
                    }
                }
                fCurrentStep[i]++;
                if (DEBUG_MATCH) {
                    System.out.println(toString()+" [CHILD] after MATCHED!");
                }
            }
            if (fCurrentStep[i] == steps.length) {
                if(sawDescendant) {
                    fCurrentStep[i] = descendantStep;
                    fMatched[i] = MATCHED_DESCENDANT;
                } else {
                    fMatched[i] = MATCHED;
                }
                continue;
            }

            // match attribute::... step
            if (fCurrentStep[i] < steps.length &&
                steps[fCurrentStep[i]].axis.type == XPath.Axis.ATTRIBUTE) {
                if (DEBUG_MATCH) {
                    System.out.println(toString()+" [ATTRIBUTE] before");
                }
                int attrCount = attributes.getLength();
                if (attrCount > 0) {
                    XPath.NodeTest nodeTest = steps[fCurrentStep[i]].nodeTest;

                    for (int aIndex = 0; aIndex < attrCount; aIndex++) {
                        attributes.getName(aIndex, fQName);
                        if (nodeTest.type != XPath.NodeTest.QNAME ||
                            nodeTest.name.equals(fQName)) {
                            fCurrentStep[i]++;
                            if (fCurrentStep[i] == steps.length) {
                                fMatched[i] = MATCHED_ATTRIBUTE;
                                int j=0;
                                for(; j<i && ((fMatched[j] & MATCHED) != MATCHED); j++);
                                if(j==i) {
                                    AttributePSVI attrPSVI = (AttributePSVI)attributes.getAugmentations(aIndex).getItem(Constants.ATTRIBUTE_PSVI);
                                    fMatchedString = attrPSVI.getActualNormalizedValue();
                                    matched(fMatchedString, attrPSVI.getActualNormalizedValueType(), attrPSVI.getItemValueTypes(), false);
                                }
                            }
                            break;
                        }
                    }
                }
                if ((fMatched[i] & MATCHED) != MATCHED) {
                    if(fCurrentStep[i] > descendantStep) {
                        fCurrentStep[i] = descendantStep;
                        continue;
                    }
                    fNoMatchDepth[i]++;
                    if (DEBUG_MATCH) {
                        System.out.println(toString()+" [ATTRIBUTE] after");
                    }
                    continue;
                }
                if (DEBUG_MATCH) {
                    System.out.println(toString()+" [ATTRIBUTE] after MATCHED!");
                }
            }
        }

    } 
    // startElement(QName,XMLAttrList,int)

    /**
       * @param element
       *        name of the element.
       * @param type
       *        content type of this element. IOW, the XML schema type
       *        of the <tt>value</tt>. Note that this may not be the type declared
       *        in the element declaration, but it is "the actual type". For example,
       *        if the XML is &lt;foo xsi:type="xs:string">aaa&lt;/foo>, this
       *        parameter will be "xs:string".
       * @param nillable - nillable
       *        true if the element declaration is nillable.
       * @param value - actual value
       *        the typed value of the content of this element. 
       */
    public void endElement(QName element, XSTypeDefinition type, boolean nillable, Object value, short valueType, ShortList itemValueType) {
        if (DEBUG_METHODS2) {
            System.out.println(toString()+"#endElement("+
                               "element={"+element+"},"+
                               ")");
        }
        for(int i = 0; i<fLocationPaths.length; i++) {
            // go back a step
            fCurrentStep[i] = fStepIndexes[i].pop();

            // don't do anything, if not matching
            if (fNoMatchDepth[i] > 0) {
                fNoMatchDepth[i]--;
            }

            // signal match, if appropriate
            else {
                int j=0;
                for(; j<i && ((fMatched[j] & MATCHED) != MATCHED); j++);
                if ((j<i) || (fMatched[j] == 0) ||
                        ((fMatched[j] & MATCHED_ATTRIBUTE) == MATCHED_ATTRIBUTE)) {
                    continue;
                }
                // only certain kinds of matchers actually
                // match element content.  This permits
                // them a way to override this to do nothing
                // and hopefully save a few operations.
                handleContent(type, nillable, value, valueType, itemValueType);
                fMatched[i] = 0;
            }

            if (DEBUG_STACK) {
                System.out.println(toString()+": "+fStepIndexes[i]);
            }
        }

    } // endElement(QName)

    //
    // Object methods
    //

    /** Returns a string representation of this object. */
    public String toString() {
        /***
        return fLocationPath.toString();
        /***/
        StringBuffer str = new StringBuffer();
        String s = super.toString();
        int index2 = s.lastIndexOf('.');
        if (index2 != -1) {
            s = s.substring(index2 + 1);
        }
        str.append(s);
        for(int i =0;i<fLocationPaths.length; i++) {
            str.append('[');
            XPath.Step[] steps = fLocationPaths[i].steps;
            for (int j = 0; j < steps.length; j++) {
                if (j == fCurrentStep[i]) {
                    str.append('^');
                }
                str.append(steps[j].toString());
                if (j < steps.length - 1) {
                    str.append('/');
                }
            }
            if (fCurrentStep[i] == steps.length) {
                str.append('^');
            }
            str.append(']');
            str.append(',');
        }
        return str.toString();
    } // toString():String

    //
    // Private methods
    //

    /** Normalizes text. */
    private String normalize(String s) {
        StringBuffer str = new StringBuffer();
        int length = s.length();
        for (int i = 0; i < length; i++) {
            char c = s.charAt(i);
            switch (c) {
                case '\n': {
                    str.append("\\n");
                    break;
                }
                default: {
                    str.append(c);
                }
            }
        }
        return str.toString();
    } // normalize(String):String

    //
    // MAIN
    //

    // NOTE: The main of this class is here for debugging purposes.
    //       However, javac (JDK 1.1.8) has an internal compiler
    //       error when compiling. Jikes has no problem, though.
    //
    //       If you want to use this main, use Jikes to compile but
    //       *never* check in this code to CVS without commenting it
    //       out. -Ac

    /** Main program. */
    /***
    public static void main(String[] argv) throws XNIException {

        if (DEBUG_ANY) {
            for (int i = 0; i < argv.length; i++) {
                final String expr = argv[i];
                final XPath xpath = new XPath(expr, symbols, null);
                final XPathMatcher matcher = new XPathMatcher(xpath, true);
                com.sun.org.apache.xerces.internal.parsers.SAXParser parser =
                    new com.sun.org.apache.xerces.internal.parsers.SAXParser(symbols) {
                    public void startDocument() throws XNIException {
                        matcher.startDocumentFragment(symbols, null);
                    }
                    public void startElement(QName element, XMLAttrList attributes, int handle) throws XNIException {
                        matcher.startElement(element, attributes, handle);
                    }
                    public void characters(char[] ch, int offset, int length) throws XNIException {
                        matcher.characters(ch, offset, length);
                    }
                    public void endElement(QName element) throws XNIException {
                        matcher.endElement(element);
                    }
                    public void endDocument() throws XNIException {
                        matcher.endDocumentFragment();
                    }
                };
                System.out.println("#### argv["+i+"]: \""+expr+"\" -> \""+xpath.toString()+'"');
                final String uri = argv[++i];
                System.out.println("#### argv["+i+"]: "+uri);
                parser.parse(uri);
            }
        }

    } // main(String[])
    /***/

} // class XPathMatcher