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/*******************************************************************************
* Copyright (c) 2009, 2014 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.jdt.internal.core;
import org.eclipse.jdt.core.Flags;
import org.eclipse.jdt.core.IField;
import org.eclipse.jdt.core.IJavaModelStatusConstants;
import org.eclipse.jdt.core.IMethod;
import org.eclipse.jdt.core.IType;
import org.eclipse.jdt.core.JavaModelException;
import org.eclipse.jdt.core.Signature;
import org.eclipse.jdt.core.compiler.CharOperation;
import org.eclipse.jdt.internal.compiler.env.IBinaryMethod;
import org.eclipse.jdt.internal.compiler.util.HashtableOfObjectToIntArray;
import org.eclipse.jdt.internal.core.util.Util;
public class JavadocContents {
private static final int[] UNKNOWN_FORMAT = new int[0];
private BinaryType type;
private char[] content;
private int childrenStart;
private boolean hasComputedChildrenSections = false;
private int indexOfFieldDetails;
private int indexOfConstructorDetails;
private int indexOfMethodDetails;
private int indexOfEndOfClassData;
private int indexOfFieldsBottom;
private int indexOfAllMethodsTop;
private int indexOfAllMethodsBottom;
private int[] typeDocRange;
private HashtableOfObjectToIntArray fieldDocRanges;
private HashtableOfObjectToIntArray methodDocRanges;
private int[] fieldAnchorIndexes;
private int fieldAnchorIndexesCount;
private int fieldLastAnchorFoundIndex;
private int[] methodAnchorIndexes;
private int methodAnchorIndexesCount;
private int methodLastAnchorFoundIndex;
private int[] unknownFormatAnchorIndexes;
private int unknownFormatAnchorIndexesCount;
private int unknownFormatLastAnchorFoundIndex;
private int[] tempAnchorIndexes;
private int tempAnchorIndexesCount;
private int tempLastAnchorFoundIndex;
public JavadocContents(BinaryType type, String content) {
this(content);
this.type = type;
}
public JavadocContents(String content) {
this.content = content != null ? content.toCharArray() : null;
}
/*
* Returns the part of the javadoc that describe the type
*/
public String getTypeDoc() throws JavaModelException {
if (this.content == null) return null;
synchronized (this) {
if (this.typeDocRange == null) {
computeTypeRange();
}
}
if (this.typeDocRange != null) {
if (this.typeDocRange == UNKNOWN_FORMAT) throw new JavaModelException(new JavaModelStatus(IJavaModelStatusConstants.UNKNOWN_JAVADOC_FORMAT, this.type));
return String.valueOf(CharOperation.subarray(this.content, this.typeDocRange[0], this.typeDocRange[1]));
}
return null;
}
public String getPackageDoc() throws JavaModelException {
if (this.content == null) return null;
int[] range = null;
int index = CharOperation.indexOf(JavadocConstants.PACKAGE_DESCRIPTION_START2, this.content, false, 0);
if (index == -1) {
index = CharOperation.indexOf(JavadocConstants.PACKAGE_DESCRIPTION_START, this.content, false, 0);
}
if (index == -1) return null;
index = CharOperation.indexOf(JavadocConstants.ANCHOR_SUFFIX, this.content, false, index);
if (index == -1) return null;
int start = CharOperation.indexOf(JavadocConstants.H2_PREFIX, this.content, false, index);
if (start != -1) {
start = CharOperation.indexOf(JavadocConstants.H2_SUFFIX, this.content, false, start);
if (start != -1) index = start + JavadocConstants.H2_SUFFIX_LENGTH;
}
if (index != -1) {
int end = CharOperation.indexOf(JavadocConstants.BOTTOM_NAVBAR, this.content, false, index);
if (end == -1) end = this.content.length -1;
range = new int[]{index, end};
return String.valueOf(CharOperation.subarray(this.content, range[0], range[1]));
}
return null;
}
/*
* Returns the part of the javadoc that describe a field of the type
*/
public String getFieldDoc(IField child) throws JavaModelException {
if (this.content == null) return null;
int[] range = null;
synchronized (this) {
if (this.fieldDocRanges == null) {
this.fieldDocRanges = new HashtableOfObjectToIntArray();
} else {
range = this.fieldDocRanges.get(child);
}
if (range == null) {
range = computeFieldRange(child);
this.fieldDocRanges.put(child, range);
}
}
if (range != null) {
if (range == UNKNOWN_FORMAT) throw new JavaModelException(new JavaModelStatus(IJavaModelStatusConstants.UNKNOWN_JAVADOC_FORMAT, child));
return String.valueOf(CharOperation.subarray(this.content, range[0], range[1]));
}
return null;
}
/*
* Returns the part of the javadoc that describe a method of the type
*/
public String getMethodDoc(IMethod child) throws JavaModelException {
if (this.content == null) return null;
int[] range = null;
synchronized (this) {
if (this.methodDocRanges == null) {
this.methodDocRanges = new HashtableOfObjectToIntArray();
} else {
range = this.methodDocRanges.get(child);
}
if (range == null) {
range = computeMethodRange(child);
this.methodDocRanges.put(child, range);
}
}
if (range != null) {
if (range == UNKNOWN_FORMAT) {
throw new JavaModelException(new JavaModelStatus(IJavaModelStatusConstants.UNKNOWN_JAVADOC_FORMAT, child));
}
return String.valueOf(CharOperation.subarray(this.content, range[0], range[1]));
}
return null;
}
/*
* Compute the ranges of the parts of the javadoc that describe each method of the type
*/
private int[] computeChildRange(char[] anchor, int indexOfSectionBottom) throws JavaModelException {
// checks each known anchor locations
if (this.tempAnchorIndexesCount > 0) {
for (int i = 0; i < this.tempAnchorIndexesCount; i++) {
int anchorEndStart = this.tempAnchorIndexes[i];
if (anchorEndStart != -1 && CharOperation.prefixEquals(anchor, this.content, false, anchorEndStart)) {
this.tempAnchorIndexes[i] = -1;
return computeChildRange(anchorEndStart, anchor, indexOfSectionBottom);
}
}
}
int fromIndex = this.tempLastAnchorFoundIndex;
int index;
// check each next unknown anchor locations
while ((index = CharOperation.indexOf(JavadocConstants.ANCHOR_PREFIX_START, this.content, false, fromIndex)) != -1 && (index < indexOfSectionBottom || indexOfSectionBottom == -1)) {
fromIndex = index + 1;
int anchorEndStart = index + JavadocConstants.ANCHOR_PREFIX_START_LENGHT;
this.tempLastAnchorFoundIndex = anchorEndStart;
if (CharOperation.prefixEquals(anchor, this.content, false, anchorEndStart)) {
return computeChildRange(anchorEndStart, anchor, indexOfSectionBottom);
} else {
if (this.tempAnchorIndexes.length == this.tempAnchorIndexesCount) {
System.arraycopy(this.tempAnchorIndexes, 0, this.tempAnchorIndexes = new int[this.tempAnchorIndexesCount + 20], 0, this.tempAnchorIndexesCount);
}
this.tempAnchorIndexes[this.tempAnchorIndexesCount++] = anchorEndStart;
}
}
return null;
}
private int[] computeChildRange(int anchorEndStart, char[] anchor, int indexOfBottom) {
int[] range = null;
// try to find the bottom of the section
if (indexOfBottom != -1) {
// try to find the end of the anchor
int indexOfEndLink = CharOperation.indexOf(JavadocConstants.ANCHOR_SUFFIX, this.content, false, anchorEndStart + anchor.length);
if (indexOfEndLink != -1) {
// try to find the next anchor
int indexOfNextElement = CharOperation.indexOf(JavadocConstants.ANCHOR_PREFIX_START, this.content, false, indexOfEndLink);
int javadocStart = indexOfEndLink + JavadocConstants.ANCHOR_SUFFIX_LENGTH;
int javadocEnd = indexOfNextElement == -1 ? indexOfBottom : Math.min(indexOfNextElement, indexOfBottom);
range = new int[]{javadocStart, javadocEnd};
} else {
// the anchor has no suffix
range = UNKNOWN_FORMAT;
}
} else {
// the detail section has no bottom
range = UNKNOWN_FORMAT;
}
return range;
}
private void computeChildrenSections() {
// try to find the next separator part
int lastIndex = CharOperation.indexOf(JavadocConstants.SEPARATOR_START, this.content, false, this.childrenStart);
lastIndex = lastIndex == -1 ? this.childrenStart : lastIndex;
// try to find field detail start
this.indexOfFieldDetails = CharOperation.indexOf(JavadocConstants.FIELD_DETAIL, this.content, false, lastIndex);
lastIndex = this.indexOfFieldDetails == -1 ? lastIndex : this.indexOfFieldDetails;
// try to find constructor detail start
this.indexOfConstructorDetails = CharOperation.indexOf(JavadocConstants.CONSTRUCTOR_DETAIL, this.content, false, lastIndex);
lastIndex = this.indexOfConstructorDetails == -1 ? lastIndex : this.indexOfConstructorDetails;
// try to find method detail start
this.indexOfMethodDetails = CharOperation.indexOf(JavadocConstants.METHOD_DETAIL, this.content, false, lastIndex);
lastIndex = this.indexOfMethodDetails == -1 ? lastIndex : this.indexOfMethodDetails;
// we take the end of class data
this.indexOfEndOfClassData = CharOperation.indexOf(JavadocConstants.END_OF_CLASS_DATA, this.content, false, lastIndex);
// try to find the field detail end
this.indexOfFieldsBottom =
this.indexOfConstructorDetails != -1 ? this.indexOfConstructorDetails :
this.indexOfMethodDetails != -1 ? this.indexOfMethodDetails:
this.indexOfEndOfClassData;
this.indexOfAllMethodsTop =
this.indexOfConstructorDetails != -1 ?
this.indexOfConstructorDetails :
this.indexOfMethodDetails;
this.indexOfAllMethodsBottom = this.indexOfEndOfClassData;
this.hasComputedChildrenSections = true;
}
/*
* Compute the ranges of the parts of the javadoc that describe each child of the type (fields, methods)
*/
private int[] computeFieldRange(IField field) throws JavaModelException {
if (!this.hasComputedChildrenSections) {
computeChildrenSections();
}
StringBuffer buffer = new StringBuffer(field.getElementName());
buffer.append(JavadocConstants.ANCHOR_PREFIX_END);
char[] anchor = String.valueOf(buffer).toCharArray();
int[] range = null;
if (this.indexOfFieldDetails == -1 || this.indexOfFieldsBottom == -1) {
// the detail section has no top or bottom, so the doc has an unknown format
if (this.unknownFormatAnchorIndexes == null) {
this.unknownFormatAnchorIndexes = new int[this.type.getChildren().length];
this.unknownFormatAnchorIndexesCount = 0;
this.unknownFormatLastAnchorFoundIndex = this.childrenStart;
}
this.tempAnchorIndexes = this.unknownFormatAnchorIndexes;
this.tempAnchorIndexesCount = this.unknownFormatAnchorIndexesCount;
this.tempLastAnchorFoundIndex = this.unknownFormatLastAnchorFoundIndex;
range = computeChildRange(anchor, this.indexOfFieldsBottom);
this.unknownFormatLastAnchorFoundIndex = this.tempLastAnchorFoundIndex;
this.unknownFormatAnchorIndexesCount = this.tempAnchorIndexesCount;
this.unknownFormatAnchorIndexes = this.tempAnchorIndexes;
} else {
if (this.fieldAnchorIndexes == null) {
this.fieldAnchorIndexes = new int[this.type.getFields().length];
this.fieldAnchorIndexesCount = 0;
this.fieldLastAnchorFoundIndex = this.indexOfFieldDetails;
}
this.tempAnchorIndexes = this.fieldAnchorIndexes;
this.tempAnchorIndexesCount = this.fieldAnchorIndexesCount;
this.tempLastAnchorFoundIndex = this.fieldLastAnchorFoundIndex;
range = computeChildRange(anchor, this.indexOfFieldsBottom);
this.fieldLastAnchorFoundIndex = this.tempLastAnchorFoundIndex;
this.fieldAnchorIndexesCount = this.tempAnchorIndexesCount;
this.fieldAnchorIndexes = this.tempAnchorIndexes;
}
return range;
}
/*
* Compute the ranges of the parts of the javadoc that describe each method of the type
*/
private int[] computeMethodRange(IMethod method) throws JavaModelException {
if (!this.hasComputedChildrenSections) {
computeChildrenSections();
}
char[] anchor = computeMethodAnchorPrefixEnd((BinaryMethod)method).toCharArray();
int[] range = null;
if (this.indexOfAllMethodsTop == -1 || this.indexOfAllMethodsBottom == -1) {
// the detail section has no top or bottom, so the doc has an unknown format
if (this.unknownFormatAnchorIndexes == null) {
this.unknownFormatAnchorIndexes = new int[this.type.getChildren().length];
this.unknownFormatAnchorIndexesCount = 0;
this.unknownFormatLastAnchorFoundIndex = this.childrenStart;
}
this.tempAnchorIndexes = this.unknownFormatAnchorIndexes;
this.tempAnchorIndexesCount = this.unknownFormatAnchorIndexesCount;
this.tempLastAnchorFoundIndex = this.unknownFormatLastAnchorFoundIndex;
range = computeChildRange(anchor, this.indexOfFieldsBottom);
if (range == null) {
range = computeChildRange(getJavadoc8Anchor(anchor), this.indexOfAllMethodsBottom);
}
this.unknownFormatLastAnchorFoundIndex = this.tempLastAnchorFoundIndex;
this.unknownFormatAnchorIndexesCount = this.tempAnchorIndexesCount;
this.unknownFormatAnchorIndexes = this.tempAnchorIndexes;
} else {
if (this.methodAnchorIndexes == null) {
this.methodAnchorIndexes = new int[this.type.getFields().length];
this.methodAnchorIndexesCount = 0;
this.methodLastAnchorFoundIndex = this.indexOfAllMethodsTop;
}
this.tempAnchorIndexes = this.methodAnchorIndexes;
this.tempAnchorIndexesCount = this.methodAnchorIndexesCount;
this.tempLastAnchorFoundIndex = this.methodLastAnchorFoundIndex;
range = computeChildRange(anchor, this.indexOfAllMethodsBottom);
if (range == null) {
range = computeChildRange(getJavadoc8Anchor(anchor), this.indexOfAllMethodsBottom);
}
this.methodLastAnchorFoundIndex = this.tempLastAnchorFoundIndex;
this.methodAnchorIndexesCount = this.tempAnchorIndexesCount;
this.methodAnchorIndexes = this.tempAnchorIndexes;
}
return range;
}
private static char[] getJavadoc8Anchor(char[] anchor) {
// fix for bug 432284: [1.8] Javadoc-8-style anchors not found by IMethod#getAttachedJavadoc(..)
char[] anchor8 = new char[anchor.length];
int i8 = 0;
for (int i = 0; i < anchor.length; i++) {
char ch = anchor[i];
switch (ch) {
case '(':
case ')':
case ',':
anchor8[i8++] = '-';
break;
case '[':
anchor8[i8++] = ':';
anchor8[i8++] = 'A';
break;
case ' ': // handled by preceding ','
case ']': // handled by preceding '['
break;
default:
anchor8[i8++] = ch;
}
}
if (i8 != anchor.length) {
anchor8 = CharOperation.subarray(anchor8, 0, i8);
}
return anchor8;
}
private String computeMethodAnchorPrefixEnd(BinaryMethod method) throws JavaModelException {
String typeQualifiedName = null;
if (this.type.isMember()) {
IType currentType = this.type;
StringBuffer buffer = new StringBuffer();
while (currentType != null) {
buffer.insert(0, currentType.getElementName());
currentType = currentType.getDeclaringType();
if (currentType != null) {
buffer.insert(0, '.');
}
}
typeQualifiedName = new String(buffer.toString());
} else {
typeQualifiedName = this.type.getElementName();
}
String methodName = method.getElementName();
if (method.isConstructor()) {
methodName = typeQualifiedName;
}
IBinaryMethod info = (IBinaryMethod) method.getElementInfo();
char[] genericSignature = info.getGenericSignature();
String anchor = null;
if (genericSignature != null) {
genericSignature = CharOperation.replaceOnCopy(genericSignature, '/', '.');
anchor = Util.toAnchor(0, genericSignature, methodName, Flags.isVarargs(method.getFlags()));
if (anchor == null) throw new JavaModelException(new JavaModelStatus(IJavaModelStatusConstants.UNKNOWN_JAVADOC_FORMAT, method));
} else {
anchor = Signature.toString(method.getSignature().replace('/', '.'), methodName, null, true, false, Flags.isVarargs(method.getFlags()));
}
IType declaringType = this.type;
if (declaringType.isMember()) {
// might need to remove a part of the signature corresponding to the synthetic argument (only for constructor)
if (method.isConstructor() && !Flags.isStatic(declaringType.getFlags())) {
int indexOfOpeningParen = anchor.indexOf('(');
if (indexOfOpeningParen == -1) {
// should not happen as this is a method signature
return null;
}
int index = indexOfOpeningParen;
indexOfOpeningParen++;
int indexOfComma = anchor.indexOf(',', index);
if (indexOfComma != -1) {
index = indexOfComma + 2;
} else {
// no argument, but a synthetic argument
index = anchor.indexOf(')', index);
}
anchor = anchor.substring(0, indexOfOpeningParen) + anchor.substring(index);
}
}
return anchor + JavadocConstants.ANCHOR_PREFIX_END;
}
/*
* Compute the range of the part of the javadoc that describe the type
*/
private void computeTypeRange() throws JavaModelException {
final int indexOfStartOfClassData = CharOperation.indexOf(JavadocConstants.START_OF_CLASS_DATA, this.content, false);
if (indexOfStartOfClassData == -1) {
this.typeDocRange = UNKNOWN_FORMAT;
return;
}
int indexOfNextSeparator = CharOperation.indexOf(JavadocConstants.SEPARATOR_START, this.content, false, indexOfStartOfClassData);
if (indexOfNextSeparator == -1) {
this.typeDocRange = UNKNOWN_FORMAT;
return;
}
int indexOfNextSummary = CharOperation.indexOf(JavadocConstants.NESTED_CLASS_SUMMARY, this.content, false, indexOfNextSeparator);
if (indexOfNextSummary == -1 && this.type.isEnum()) {
// try to find enum constant summary start
indexOfNextSummary = CharOperation.indexOf(JavadocConstants.ENUM_CONSTANT_SUMMARY, this.content, false, indexOfNextSeparator);
}
if (indexOfNextSummary == -1 && this.type.isAnnotation()) {
// try to find required enum constant summary start
indexOfNextSummary = CharOperation.indexOf(JavadocConstants.ANNOTATION_TYPE_REQUIRED_MEMBER_SUMMARY, this.content, false, indexOfNextSeparator);
if (indexOfNextSummary == -1) {
// try to find optional enum constant summary start
indexOfNextSummary = CharOperation.indexOf(JavadocConstants.ANNOTATION_TYPE_OPTIONAL_MEMBER_SUMMARY, this.content, false, indexOfNextSeparator);
}
}
if (indexOfNextSummary == -1) {
// try to find field summary start
indexOfNextSummary = CharOperation.indexOf(JavadocConstants.FIELD_SUMMARY, this.content, false, indexOfNextSeparator);
}
if (indexOfNextSummary == -1) {
// try to find constructor summary start
indexOfNextSummary = CharOperation.indexOf(JavadocConstants.CONSTRUCTOR_SUMMARY, this.content, false, indexOfNextSeparator);
}
if (indexOfNextSummary == -1) {
// try to find method summary start
indexOfNextSummary = CharOperation.indexOf(JavadocConstants.METHOD_SUMMARY, this.content, false, indexOfNextSeparator);
}
if (indexOfNextSummary == -1) {
// we take the end of class data
indexOfNextSummary = CharOperation.indexOf(JavadocConstants.END_OF_CLASS_DATA, this.content, false, indexOfNextSeparator);
} else {
// improve performance of computation of children ranges
this.childrenStart = indexOfNextSummary + 1;
}
if (indexOfNextSummary == -1) {
this.typeDocRange = UNKNOWN_FORMAT;
return;
}
/*
* Cut off the type hierarchy, see bug 119844.
* We remove the contents between the start of class data and where
* we guess the actual class comment starts.
*/
int start = indexOfStartOfClassData + JavadocConstants.START_OF_CLASS_DATA_LENGTH;
int indexOfFirstParagraph = CharOperation.indexOf(JavadocConstants.P.toCharArray(), this.content, false, start, indexOfNextSummary);
int indexOfFirstDiv = CharOperation.indexOf(JavadocConstants.DIV_CLASS_BLOCK.toCharArray(), this.content, false, start, indexOfNextSummary);
int afterHierarchy = indexOfNextSummary;
if (indexOfFirstParagraph != -1 && indexOfFirstParagraph < afterHierarchy) {
afterHierarchy = indexOfFirstParagraph;
}
if (indexOfFirstDiv != -1 && indexOfFirstDiv < afterHierarchy) {
afterHierarchy = indexOfFirstDiv;
}
if (afterHierarchy != indexOfNextSummary) {
start = afterHierarchy;
}
this.typeDocRange = new int[]{start, indexOfNextSummary};
}
}
