| /** |
| * Copyright (c) 2008, http://www.snakeyaml.org |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.yaml.snakeyaml.constructor; |
| |
| import java.math.BigInteger; |
| import java.text.NumberFormat; |
| import java.text.ParseException; |
| import java.util.ArrayList; |
| import java.util.Calendar; |
| import java.util.Collections; |
| import java.util.HashMap; |
| import java.util.Iterator; |
| import java.util.LinkedHashMap; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.Set; |
| import java.util.TimeZone; |
| import java.util.regex.Matcher; |
| import java.util.regex.Pattern; |
| |
| import org.yaml.snakeyaml.error.YAMLException; |
| import org.yaml.snakeyaml.external.biz.base64Coder.Base64Coder; |
| import org.yaml.snakeyaml.nodes.MappingNode; |
| import org.yaml.snakeyaml.nodes.Node; |
| import org.yaml.snakeyaml.nodes.NodeId; |
| import org.yaml.snakeyaml.nodes.NodeTuple; |
| import org.yaml.snakeyaml.nodes.ScalarNode; |
| import org.yaml.snakeyaml.nodes.SequenceNode; |
| import org.yaml.snakeyaml.nodes.Tag; |
| |
| /** |
| * Construct standard Java classes |
| */ |
| public class SafeConstructor extends BaseConstructor { |
| |
| public static final ConstructUndefined undefinedConstructor = new ConstructUndefined(); |
| |
| public SafeConstructor() { |
| this.yamlConstructors.put(Tag.NULL, new ConstructYamlNull()); |
| this.yamlConstructors.put(Tag.BOOL, new ConstructYamlBool()); |
| this.yamlConstructors.put(Tag.INT, new ConstructYamlInt()); |
| this.yamlConstructors.put(Tag.FLOAT, new ConstructYamlFloat()); |
| this.yamlConstructors.put(Tag.BINARY, new ConstructYamlBinary()); |
| this.yamlConstructors.put(Tag.TIMESTAMP, new ConstructYamlTimestamp()); |
| this.yamlConstructors.put(Tag.OMAP, new ConstructYamlOmap()); |
| this.yamlConstructors.put(Tag.PAIRS, new ConstructYamlPairs()); |
| this.yamlConstructors.put(Tag.SET, new ConstructYamlSet()); |
| this.yamlConstructors.put(Tag.STR, new ConstructYamlStr()); |
| this.yamlConstructors.put(Tag.SEQ, new ConstructYamlSeq()); |
| this.yamlConstructors.put(Tag.MAP, new ConstructYamlMap()); |
| this.yamlConstructors.put(null, undefinedConstructor); |
| this.yamlClassConstructors.put(NodeId.scalar, undefinedConstructor); |
| this.yamlClassConstructors.put(NodeId.sequence, undefinedConstructor); |
| this.yamlClassConstructors.put(NodeId.mapping, undefinedConstructor); |
| } |
| |
| protected void flattenMapping(MappingNode node) { |
| // perform merging only on nodes containing merge node(s) |
| if (node.isMerged()) { |
| node.setValue(mergeNode(node, true, new HashMap<Object, Integer>(), |
| new ArrayList<NodeTuple>())); |
| } |
| } |
| |
| /** |
| * Does merge for supplied mapping node. |
| * |
| * @param node |
| * where to merge |
| * @param isPreffered |
| * true if keys of node should take precedence over others... |
| * @param key2index |
| * maps already merged keys to index from values |
| * @param values |
| * collects merged NodeTuple |
| * @return list of the merged NodeTuple (to be set as value for the |
| * MappingNode) |
| */ |
| private List<NodeTuple> mergeNode(MappingNode node, boolean isPreffered, |
| Map<Object, Integer> key2index, List<NodeTuple> values) { |
| List<NodeTuple> nodeValue = node.getValue(); |
| // reversed for http://code.google.com/p/snakeyaml/issues/detail?id=139 |
| Collections.reverse(nodeValue); |
| for (Iterator<NodeTuple> iter = nodeValue.iterator(); iter.hasNext();) { |
| final NodeTuple nodeTuple = iter.next(); |
| final Node keyNode = nodeTuple.getKeyNode(); |
| final Node valueNode = nodeTuple.getValueNode(); |
| if (keyNode.getTag().equals(Tag.MERGE)) { |
| iter.remove(); |
| switch (valueNode.getNodeId()) { |
| case mapping: |
| MappingNode mn = (MappingNode) valueNode; |
| mergeNode(mn, false, key2index, values); |
| break; |
| case sequence: |
| SequenceNode sn = (SequenceNode) valueNode; |
| List<Node> vals = sn.getValue(); |
| for (Node subnode : vals) { |
| if (!(subnode instanceof MappingNode)) { |
| throw new ConstructorException("while constructing a mapping", |
| node.getStartMark(), |
| "expected a mapping for merging, but found " |
| + subnode.getNodeId(), subnode.getStartMark()); |
| } |
| MappingNode mnode = (MappingNode) subnode; |
| mergeNode(mnode, false, key2index, values); |
| } |
| break; |
| default: |
| throw new ConstructorException("while constructing a mapping", |
| node.getStartMark(), |
| "expected a mapping or list of mappings for merging, but found " |
| + valueNode.getNodeId(), valueNode.getStartMark()); |
| } |
| } else { |
| // we need to construct keys to avoid duplications |
| Object key = constructObject(keyNode); |
| if (!key2index.containsKey(key)) { // 1st time merging key |
| values.add(nodeTuple); |
| // keep track where tuple for the key is |
| key2index.put(key, values.size() - 1); |
| } else if (isPreffered) { // there is value for the key, but we |
| // need to override it |
| // change value for the key using saved position |
| values.set(key2index.get(key), nodeTuple); |
| } |
| } |
| } |
| return values; |
| } |
| |
| protected void constructMapping2ndStep(MappingNode node, Map<Object, Object> mapping) { |
| flattenMapping(node); |
| super.constructMapping2ndStep(node, mapping); |
| } |
| |
| @Override |
| protected void constructSet2ndStep(MappingNode node, Set<Object> set) { |
| flattenMapping(node); |
| super.constructSet2ndStep(node, set); |
| } |
| |
| public class ConstructYamlNull extends AbstractConstruct { |
| public Object construct(Node node) { |
| constructScalar((ScalarNode) node); |
| return null; |
| } |
| } |
| |
| private final static Map<String, Boolean> BOOL_VALUES = new HashMap<String, Boolean>(); |
| static { |
| BOOL_VALUES.put("yes", Boolean.TRUE); |
| BOOL_VALUES.put("no", Boolean.FALSE); |
| BOOL_VALUES.put("true", Boolean.TRUE); |
| BOOL_VALUES.put("false", Boolean.FALSE); |
| BOOL_VALUES.put("on", Boolean.TRUE); |
| BOOL_VALUES.put("off", Boolean.FALSE); |
| } |
| |
| public class ConstructYamlBool extends AbstractConstruct { |
| public Object construct(Node node) { |
| String val = (String) constructScalar((ScalarNode) node); |
| return BOOL_VALUES.get(val.toLowerCase()); |
| } |
| } |
| |
| public class ConstructYamlInt extends AbstractConstruct { |
| public Object construct(Node node) { |
| String value = constructScalar((ScalarNode) node).toString().replaceAll("_", ""); |
| int sign = +1; |
| char first = value.charAt(0); |
| if (first == '-') { |
| sign = -1; |
| value = value.substring(1); |
| } else if (first == '+') { |
| value = value.substring(1); |
| } |
| int base = 10; |
| if ("0".equals(value)) { |
| return Integer.valueOf(0); |
| } else if (value.startsWith("0b")) { |
| value = value.substring(2); |
| base = 2; |
| } else if (value.startsWith("0x")) { |
| value = value.substring(2); |
| base = 16; |
| } else if (value.startsWith("0")) { |
| value = value.substring(1); |
| base = 8; |
| } else if (value.indexOf(':') != -1) { |
| String[] digits = value.split(":"); |
| int bes = 1; |
| int val = 0; |
| for (int i = 0, j = digits.length; i < j; i++) { |
| val += Long.parseLong(digits[j - i - 1]) * bes; |
| bes *= 60; |
| } |
| return createNumber(sign, String.valueOf(val), 10); |
| } else { |
| return createNumber(sign, value, 10); |
| } |
| return createNumber(sign, value, base); |
| } |
| } |
| |
| private Number createNumber(int sign, String number, int radix) { |
| Number result; |
| if (sign < 0) { |
| number = "-" + number; |
| } |
| try { |
| result = Integer.valueOf(number, radix); |
| } catch (NumberFormatException e) { |
| try { |
| result = Long.valueOf(number, radix); |
| } catch (NumberFormatException e1) { |
| result = new BigInteger(number, radix); |
| } |
| } |
| return result; |
| } |
| |
| public class ConstructYamlFloat extends AbstractConstruct { |
| public Object construct(Node node) { |
| String value = constructScalar((ScalarNode) node).toString().replaceAll("_", ""); |
| int sign = +1; |
| char first = value.charAt(0); |
| if (first == '-') { |
| sign = -1; |
| value = value.substring(1); |
| } else if (first == '+') { |
| value = value.substring(1); |
| } |
| String valLower = value.toLowerCase(); |
| if (".inf".equals(valLower)) { |
| return new Double(sign == -1 ? Double.NEGATIVE_INFINITY : Double.POSITIVE_INFINITY); |
| } else if (".nan".equals(valLower)) { |
| return new Double(Double.NaN); |
| } else if (value.indexOf(':') != -1) { |
| String[] digits = value.split(":"); |
| int bes = 1; |
| double val = 0.0; |
| for (int i = 0, j = digits.length; i < j; i++) { |
| val += Double.parseDouble(digits[j - i - 1]) * bes; |
| bes *= 60; |
| } |
| return new Double(sign * val); |
| } else { |
| Double d = Double.valueOf(value); |
| return new Double(d.doubleValue() * sign); |
| } |
| } |
| } |
| |
| public class ConstructYamlBinary extends AbstractConstruct { |
| public Object construct(Node node) { |
| byte[] decoded = Base64Coder.decode(constructScalar((ScalarNode) node).toString() |
| .toCharArray()); |
| return decoded; |
| } |
| } |
| |
| public class ConstructYamlNumber extends AbstractConstruct { |
| |
| private final NumberFormat nf = NumberFormat.getInstance(); |
| |
| public Object construct(Node node) { |
| ScalarNode scalar = (ScalarNode) node; |
| try { |
| return nf.parse(scalar.getValue()); |
| } catch (ParseException e) { |
| String lowerCaseValue = scalar.getValue().toLowerCase(); |
| if (lowerCaseValue.contains("inf") || lowerCaseValue.contains("nan")) { |
| /* |
| * Non-finites such as (+/-)infinity and NaN are not |
| * parseable by NumberFormat when these `Double` values are |
| * dumped by snakeyaml. Delegate to the `Tag.FLOAT` |
| * constructor when for this expected failure cause. |
| */ |
| return (Number) yamlConstructors.get(Tag.FLOAT).construct(node); |
| } else { |
| throw new IllegalArgumentException("Unable to parse as Number: " |
| + scalar.getValue()); |
| } |
| } |
| } |
| } |
| |
| private final static Pattern TIMESTAMP_REGEXP = Pattern |
| .compile("^([0-9][0-9][0-9][0-9])-([0-9][0-9]?)-([0-9][0-9]?)(?:(?:[Tt]|[ \t]+)([0-9][0-9]?):([0-9][0-9]):([0-9][0-9])(?:\\.([0-9]*))?(?:[ \t]*(?:Z|([-+][0-9][0-9]?)(?::([0-9][0-9])?)?))?)?$"); |
| private final static Pattern YMD_REGEXP = Pattern |
| .compile("^([0-9][0-9][0-9][0-9])-([0-9][0-9]?)-([0-9][0-9]?)$"); |
| |
| public static class ConstructYamlTimestamp extends AbstractConstruct { |
| private Calendar calendar; |
| |
| public Calendar getCalendar() { |
| return calendar; |
| } |
| |
| public Object construct(Node node) { |
| ScalarNode scalar = (ScalarNode) node; |
| String nodeValue = scalar.getValue(); |
| Matcher match = YMD_REGEXP.matcher(nodeValue); |
| if (match.matches()) { |
| String year_s = match.group(1); |
| String month_s = match.group(2); |
| String day_s = match.group(3); |
| calendar = Calendar.getInstance(TimeZone.getTimeZone("UTC")); |
| calendar.clear(); |
| calendar.set(Calendar.YEAR, Integer.parseInt(year_s)); |
| // Java's months are zero-based... |
| calendar.set(Calendar.MONTH, Integer.parseInt(month_s) - 1); // x |
| calendar.set(Calendar.DAY_OF_MONTH, Integer.parseInt(day_s)); |
| return calendar.getTime(); |
| } else { |
| match = TIMESTAMP_REGEXP.matcher(nodeValue); |
| if (!match.matches()) { |
| throw new YAMLException("Unexpected timestamp: " + nodeValue); |
| } |
| String year_s = match.group(1); |
| String month_s = match.group(2); |
| String day_s = match.group(3); |
| String hour_s = match.group(4); |
| String min_s = match.group(5); |
| // seconds and milliseconds |
| String seconds = match.group(6); |
| String millis = match.group(7); |
| if (millis != null) { |
| seconds = seconds + "." + millis; |
| } |
| double fractions = Double.parseDouble(seconds); |
| int sec_s = (int) Math.round(Math.floor(fractions)); |
| int usec = (int) Math.round((fractions - sec_s) * 1000); |
| // timezone |
| String timezoneh_s = match.group(8); |
| String timezonem_s = match.group(9); |
| TimeZone timeZone; |
| if (timezoneh_s != null) { |
| String time = timezonem_s != null ? ":" + timezonem_s : "00"; |
| timeZone = TimeZone.getTimeZone("GMT" + timezoneh_s + time); |
| } else { |
| // no time zone provided |
| timeZone = TimeZone.getTimeZone("UTC"); |
| } |
| calendar = Calendar.getInstance(timeZone); |
| calendar.set(Calendar.YEAR, Integer.parseInt(year_s)); |
| // Java's months are zero-based... |
| calendar.set(Calendar.MONTH, Integer.parseInt(month_s) - 1); |
| calendar.set(Calendar.DAY_OF_MONTH, Integer.parseInt(day_s)); |
| calendar.set(Calendar.HOUR_OF_DAY, Integer.parseInt(hour_s)); |
| calendar.set(Calendar.MINUTE, Integer.parseInt(min_s)); |
| calendar.set(Calendar.SECOND, sec_s); |
| calendar.set(Calendar.MILLISECOND, usec); |
| return calendar.getTime(); |
| } |
| } |
| } |
| |
| public class ConstructYamlOmap extends AbstractConstruct { |
| public Object construct(Node node) { |
| // Note: we do not check for duplicate keys, because it's too |
| // CPU-expensive. |
| Map<Object, Object> omap = new LinkedHashMap<Object, Object>(); |
| if (!(node instanceof SequenceNode)) { |
| throw new ConstructorException("while constructing an ordered map", |
| node.getStartMark(), "expected a sequence, but found " + node.getNodeId(), |
| node.getStartMark()); |
| } |
| SequenceNode snode = (SequenceNode) node; |
| for (Node subnode : snode.getValue()) { |
| if (!(subnode instanceof MappingNode)) { |
| throw new ConstructorException("while constructing an ordered map", |
| node.getStartMark(), "expected a mapping of length 1, but found " |
| + subnode.getNodeId(), subnode.getStartMark()); |
| } |
| MappingNode mnode = (MappingNode) subnode; |
| if (mnode.getValue().size() != 1) { |
| throw new ConstructorException("while constructing an ordered map", |
| node.getStartMark(), "expected a single mapping item, but found " |
| + mnode.getValue().size() + " items", mnode.getStartMark()); |
| } |
| Node keyNode = mnode.getValue().get(0).getKeyNode(); |
| Node valueNode = mnode.getValue().get(0).getValueNode(); |
| Object key = constructObject(keyNode); |
| Object value = constructObject(valueNode); |
| omap.put(key, value); |
| } |
| return omap; |
| } |
| } |
| |
| // Note: the same code as `construct_yaml_omap`. |
| public class ConstructYamlPairs extends AbstractConstruct { |
| public Object construct(Node node) { |
| // Note: we do not check for duplicate keys, because it's too |
| // CPU-expensive. |
| if (!(node instanceof SequenceNode)) { |
| throw new ConstructorException("while constructing pairs", node.getStartMark(), |
| "expected a sequence, but found " + node.getNodeId(), node.getStartMark()); |
| } |
| SequenceNode snode = (SequenceNode) node; |
| List<Object[]> pairs = new ArrayList<Object[]>(snode.getValue().size()); |
| for (Node subnode : snode.getValue()) { |
| if (!(subnode instanceof MappingNode)) { |
| throw new ConstructorException("while constructingpairs", node.getStartMark(), |
| "expected a mapping of length 1, but found " + subnode.getNodeId(), |
| subnode.getStartMark()); |
| } |
| MappingNode mnode = (MappingNode) subnode; |
| if (mnode.getValue().size() != 1) { |
| throw new ConstructorException("while constructing pairs", node.getStartMark(), |
| "expected a single mapping item, but found " + mnode.getValue().size() |
| + " items", mnode.getStartMark()); |
| } |
| Node keyNode = mnode.getValue().get(0).getKeyNode(); |
| Node valueNode = mnode.getValue().get(0).getValueNode(); |
| Object key = constructObject(keyNode); |
| Object value = constructObject(valueNode); |
| pairs.add(new Object[] { key, value }); |
| } |
| return pairs; |
| } |
| } |
| |
| public class ConstructYamlSet implements Construct { |
| public Object construct(Node node) { |
| if (node.isTwoStepsConstruction()) { |
| return createDefaultSet(); |
| } else { |
| return constructSet((MappingNode) node); |
| } |
| } |
| |
| @SuppressWarnings("unchecked") |
| public void construct2ndStep(Node node, Object object) { |
| if (node.isTwoStepsConstruction()) { |
| constructSet2ndStep((MappingNode) node, (Set<Object>) object); |
| } else { |
| throw new YAMLException("Unexpected recursive set structure. Node: " + node); |
| } |
| } |
| } |
| |
| public class ConstructYamlStr extends AbstractConstruct { |
| public Object construct(Node node) { |
| return constructScalar((ScalarNode) node); |
| } |
| } |
| |
| public class ConstructYamlSeq implements Construct { |
| public Object construct(Node node) { |
| SequenceNode seqNode = (SequenceNode) node; |
| if (node.isTwoStepsConstruction()) { |
| return createDefaultList(seqNode.getValue().size()); |
| } else { |
| return constructSequence(seqNode); |
| } |
| } |
| |
| @SuppressWarnings("unchecked") |
| public void construct2ndStep(Node node, Object data) { |
| if (node.isTwoStepsConstruction()) { |
| constructSequenceStep2((SequenceNode) node, (List<Object>) data); |
| } else { |
| throw new YAMLException("Unexpected recursive sequence structure. Node: " + node); |
| } |
| } |
| } |
| |
| public class ConstructYamlMap implements Construct { |
| public Object construct(Node node) { |
| if (node.isTwoStepsConstruction()) { |
| return createDefaultMap(); |
| } else { |
| return constructMapping((MappingNode) node); |
| } |
| } |
| |
| @SuppressWarnings("unchecked") |
| public void construct2ndStep(Node node, Object object) { |
| if (node.isTwoStepsConstruction()) { |
| constructMapping2ndStep((MappingNode) node, (Map<Object, Object>) object); |
| } else { |
| throw new YAMLException("Unexpected recursive mapping structure. Node: " + node); |
| } |
| } |
| } |
| |
| public static final class ConstructUndefined extends AbstractConstruct { |
| public Object construct(Node node) { |
| throw new ConstructorException(null, null, |
| "could not determine a constructor for the tag " + node.getTag(), |
| node.getStartMark()); |
| } |
| } |
| } |