All Downloads are FREE. Search and download functionalities are using the official Maven repository.

freemarker.core.TemplateConfiguration Maven / Gradle / Ivy

Go to download

FreeMarker is a "template engine"; a generic tool to generate text output based on templates.

There is a newer version: 2.3.34
Show newest version
/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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 freemarker.core;

import java.io.Reader;
import java.util.ArrayList;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;

import freemarker.cache.TemplateCache;
import freemarker.template.Configuration;
import freemarker.template.Template;
import freemarker.template.Version;
import freemarker.template._TemplateAPI;
import freemarker.template.utility.NullArgumentException;

/**
 * Used for customizing the configuration settings for individual {@link Template}-s (or rather groups of templates),
 * relatively to the common setting values coming from the {@link Configuration}. This was designed with the standard
 * template loading mechanism of FreeMarker in mind ({@link Configuration#getTemplate(String)}
 * and {@link TemplateCache}), though can also be reused for custom template loading and caching solutions.
 * 
 * 

* Note on the {@code locale} setting: When used with the standard template loading/caching mechanism ( * {@link Configuration#getTemplate(String)} and its overloads), localized lookup happens before the {@code locale} * specified here could have effect. The {@code locale} will be only set in the template that the localized lookup has * already found. * *

* Note on the encoding setting {@code encoding}: See {@link #setEncoding(String)}. * *

* Note that the result value of the reader methods (getter and "is" methods) is usually not useful unless the value of * that setting was already set on this object. Otherwise you will get the value from the parent {@link Configuration}, * or an {@link IllegalStateException} before this object is associated to a {@link Configuration}. * *

* If you are using this class for your own template loading and caching solution, rather than with the standard one, * you should be aware of a few more details: * *

    *
  • This class implements both {@link Configurable} and {@link ParserConfiguration}. This means that it can influence * both the template parsing phase and the runtime settings. For both aspects (i.e., {@link ParserConfiguration} and * {@link Configurable}) to take effect, you have first pass this object to the {@link Template} constructor * (this is where the {@link ParserConfiguration} interface is used), and then you have to call {@link #apply(Template)} * on the resulting {@link Template} object (this is where the {@link Configurable} aspect is used). * *
  • {@link #apply(Template)} only change the settings that weren't yet set on the {@link Template} (but are inherited * from the {@link Configuration}). This is primarily because if the template configures itself via the {@code #ftl} * header, those values should have precedence. A consequence of this is that if you want to configure the same * {@link Template} with multiple {@link TemplateConfiguration}-s, you either should merge them to a single one before * that (with {@link #merge(TemplateConfiguration)}), or you have to apply them in reverse order of their intended * precedence. *
* * @see Template#Template(String, String, Reader, Configuration, ParserConfiguration, String) * * @since 2.3.24 */ public final class TemplateConfiguration extends Configurable implements ParserConfiguration { private boolean parentConfigurationSet; private Integer tagSyntax; private Integer interpolationSyntax; private Integer namingConvention; private Boolean whitespaceStripping; private Boolean strictSyntaxMode; private Integer autoEscapingPolicy; private Boolean recognizeStandardFileExtensions; private OutputFormat outputFormat; private String encoding; private Integer tabSize; /** * Creates a new instance. The parent will be {@link Configuration#getDefaultConfiguration()} initially, but it will * be changed to the real parent {@link Configuration} when this object is added to the {@link Configuration}. (It's * not allowed to add the same instance to multiple {@link Configuration}-s). */ public TemplateConfiguration() { super(Configuration.getDefaultConfiguration()); } /** * Same as {@link #setParentConfiguration(Configuration)}. */ @Override void setParent(Configurable cfg) { NullArgumentException.check("cfg", cfg); if (!(cfg instanceof Configuration)) { throw new IllegalArgumentException("The parent of a TemplateConfiguration can only be a Configuration"); } if (parentConfigurationSet) { if (getParent() != cfg) { throw new IllegalStateException( "This TemplateConfiguration is already associated with a different Configuration instance."); } return; } if (((Configuration) cfg).getIncompatibleImprovements().intValue() < _TemplateAPI.VERSION_INT_2_3_22 && hasAnyConfigurableSet()) { throw new IllegalStateException( "This TemplateConfiguration can't be associated to a Configuration that has " + "incompatibleImprovements less than 2.3.22, because it changes non-parser settings."); } super.setParent(cfg); parentConfigurationSet = true; } /** * Associates this instance with a {@link Configuration}; usually you don't call this, as it's called internally * when this instance is added to a {@link Configuration}. This method can be called only once (except with the same * {@link Configuration} parameter again, as that changes nothing anyway). * * @throws IllegalArgumentException * if the argument is {@code null} or not a {@link Configuration} * @throws IllegalStateException * if this object is already associated to a different {@link Configuration} object, * or if the {@code Configuration} has {@code #getIncompatibleImprovements()} less than 2.3.22 and * this object tries to change any non-parser settings */ public void setParentConfiguration(Configuration cfg) { setParent(cfg); } /** * Returns the parent {@link Configuration}, or {@code null} if none was associated yet. */ public Configuration getParentConfiguration() { return parentConfigurationSet ? (Configuration) getParent() : null; } private Configuration getNonNullParentConfiguration() { checkParentConfigurationSet(); return (Configuration) getParent(); } /** * Set all settings in this {@link TemplateConfiguration} that were set in the parameter * {@link TemplateConfiguration}, possibly overwriting the earlier value in this object. (A setting is said to be * set in a {@link TemplateConfiguration} if it was explicitly set via a setter method, as opposed to be inherited.) */ public void merge(TemplateConfiguration tc) { if (tc.isAPIBuiltinEnabledSet()) { setAPIBuiltinEnabled(tc.isAPIBuiltinEnabled()); } if (tc.isArithmeticEngineSet()) { setArithmeticEngine(tc.getArithmeticEngine()); } if (tc.isAutoEscapingPolicySet()) { setAutoEscapingPolicy(tc.getAutoEscapingPolicy()); } if (tc.isAutoFlushSet()) { setAutoFlush(tc.getAutoFlush()); } if (tc.isBooleanFormatSet()) { setBooleanFormat(tc.getBooleanFormat()); } if (tc.isClassicCompatibleSet()) { setClassicCompatibleAsInt(tc.getClassicCompatibleAsInt()); } if (tc.isCustomDateFormatsSet()) { setCustomDateFormats(mergeMaps(getCustomDateFormats(), tc.getCustomDateFormats(), false)); } if (tc.isCustomNumberFormatsSet()) { setCustomNumberFormats(mergeMaps(getCustomNumberFormats(), tc.getCustomNumberFormats(), false)); } if (tc.isDateFormatSet()) { setDateFormat(tc.getDateFormat()); } if (tc.isDateTimeFormatSet()) { setDateTimeFormat(tc.getDateTimeFormat()); } if (tc.isEncodingSet()) { setEncoding(tc.getEncoding()); } if (tc.isLocaleSet()) { setLocale(tc.getLocale()); } if (tc.isLogTemplateExceptionsSet()) { setLogTemplateExceptions(tc.getLogTemplateExceptions()); } if (tc.isWrapUncheckedExceptionsSet()) { setWrapUncheckedExceptions(tc.getWrapUncheckedExceptions()); } if (tc.isNamingConventionSet()) { setNamingConvention(tc.getNamingConvention()); } if (tc.isNewBuiltinClassResolverSet()) { setNewBuiltinClassResolver(tc.getNewBuiltinClassResolver()); } if (tc.isNumberFormatSet()) { setNumberFormat(tc.getNumberFormat()); } if (tc.isObjectWrapperSet()) { setObjectWrapper(tc.getObjectWrapper()); } if (tc.isOutputEncodingSet()) { setOutputEncoding(tc.getOutputEncoding()); } if (tc.isOutputFormatSet()) { setOutputFormat(tc.getOutputFormat()); } if (tc.isRecognizeStandardFileExtensionsSet()) { setRecognizeStandardFileExtensions(tc.getRecognizeStandardFileExtensions()); } if (tc.isShowErrorTipsSet()) { setShowErrorTips(tc.getShowErrorTips()); } if (tc.isSQLDateAndTimeTimeZoneSet()) { setSQLDateAndTimeTimeZone(tc.getSQLDateAndTimeTimeZone()); } if (tc.isStrictSyntaxModeSet()) { setStrictSyntaxMode(tc.getStrictSyntaxMode()); } if (tc.isTagSyntaxSet()) { setTagSyntax(tc.getTagSyntax()); } if (tc.isInterpolationSyntaxSet()) { setInterpolationSyntax(tc.getInterpolationSyntax()); } if (tc.isTemplateExceptionHandlerSet()) { setTemplateExceptionHandler(tc.getTemplateExceptionHandler()); } if (tc.isAttemptExceptionReporterSet()) { setAttemptExceptionReporter(tc.getAttemptExceptionReporter()); } if (tc.isTimeFormatSet()) { setTimeFormat(tc.getTimeFormat()); } if (tc.isTimeZoneSet()) { setTimeZone(tc.getTimeZone()); } if (tc.isURLEscapingCharsetSet()) { setURLEscapingCharset(tc.getURLEscapingCharset()); } if (tc.isWhitespaceStrippingSet()) { setWhitespaceStripping(tc.getWhitespaceStripping()); } if (tc.isTabSizeSet()) { setTabSize(tc.getTabSize()); } if (tc.isLazyImportsSet()) { setLazyImports(tc.getLazyImports()); } if (tc.isLazyAutoImportsSet()) { setLazyAutoImports(tc.getLazyAutoImports()); } if (tc.isAutoImportsSet()) { setAutoImports(mergeMaps(getAutoImportsWithoutFallback(), tc.getAutoImportsWithoutFallback(), true)); } if (tc.isAutoIncludesSet()) { setAutoIncludes(mergeLists(getAutoIncludesWithoutFallback(), tc.getAutoIncludesWithoutFallback())); } tc.copyDirectCustomAttributes(this, true); } /** * Sets those settings of the {@link Template} which aren't yet set in the {@link Template} and are set in this * {@link TemplateConfiguration}, leaves the other settings as is. A setting is said to be set in a * {@link TemplateConfiguration} or {@link Template} if it was explicitly set via a setter method on that object, as * opposed to be inherited from the {@link Configuration}. * *

* Note that this method doesn't deal with settings that influence the parser, as those are already baked in at this * point via the {@link ParserConfiguration}. * *

* Note that the {@code encoding} setting of the {@link Template} counts as unset if it's {@code null}, * even if {@code null} was set via {@link Template#setEncoding(String)}. * * @throws IllegalStateException * If the parent configuration wasn't yet set. */ public void apply(Template template) { Configuration cfg = getNonNullParentConfiguration(); if (template.getConfiguration() != cfg) { // This is actually not a problem right now, but for future BC we enforce this. throw new IllegalArgumentException( "The argument Template doesn't belong to the same Configuration as the TemplateConfiguration"); } if (isAPIBuiltinEnabledSet() && !template.isAPIBuiltinEnabledSet()) { template.setAPIBuiltinEnabled(isAPIBuiltinEnabled()); } if (isArithmeticEngineSet() && !template.isArithmeticEngineSet()) { template.setArithmeticEngine(getArithmeticEngine()); } if (isAutoFlushSet() && !template.isAutoFlushSet()) { template.setAutoFlush(getAutoFlush()); } if (isBooleanFormatSet() && !template.isBooleanFormatSet()) { template.setBooleanFormat(getBooleanFormat()); } if (isClassicCompatibleSet() && !template.isClassicCompatibleSet()) { template.setClassicCompatibleAsInt(getClassicCompatibleAsInt()); } if (isCustomDateFormatsSet()) { template.setCustomDateFormats( mergeMaps(getCustomDateFormats(), template.getCustomDateFormatsWithoutFallback(), false)); } if (isCustomNumberFormatsSet()) { template.setCustomNumberFormats( mergeMaps(getCustomNumberFormats(), template.getCustomNumberFormatsWithoutFallback(), false)); } if (isDateFormatSet() && !template.isDateFormatSet()) { template.setDateFormat(getDateFormat()); } if (isDateTimeFormatSet() && !template.isDateTimeFormatSet()) { template.setDateTimeFormat(getDateTimeFormat()); } if (isEncodingSet() && template.getEncoding() == null) { template.setEncoding(getEncoding()); } if (isLocaleSet() && !template.isLocaleSet()) { template.setLocale(getLocale()); } if (isLogTemplateExceptionsSet() && !template.isLogTemplateExceptionsSet()) { template.setLogTemplateExceptions(getLogTemplateExceptions()); } if (isWrapUncheckedExceptionsSet() && !template.isWrapUncheckedExceptionsSet()) { template.setWrapUncheckedExceptions(getWrapUncheckedExceptions()); } if (isNewBuiltinClassResolverSet() && !template.isNewBuiltinClassResolverSet()) { template.setNewBuiltinClassResolver(getNewBuiltinClassResolver()); } if (isNumberFormatSet() && !template.isNumberFormatSet()) { template.setNumberFormat(getNumberFormat()); } if (isObjectWrapperSet() && !template.isObjectWrapperSet()) { template.setObjectWrapper(getObjectWrapper()); } if (isOutputEncodingSet() && !template.isOutputEncodingSet()) { template.setOutputEncoding(getOutputEncoding()); } if (isShowErrorTipsSet() && !template.isShowErrorTipsSet()) { template.setShowErrorTips(getShowErrorTips()); } if (isSQLDateAndTimeTimeZoneSet() && !template.isSQLDateAndTimeTimeZoneSet()) { template.setSQLDateAndTimeTimeZone(getSQLDateAndTimeTimeZone()); } if (isTemplateExceptionHandlerSet() && !template.isTemplateExceptionHandlerSet()) { template.setTemplateExceptionHandler(getTemplateExceptionHandler()); } if (isAttemptExceptionReporterSet() && !template.isAttemptExceptionReporterSet()) { template.setAttemptExceptionReporter(getAttemptExceptionReporter()); } if (isTimeFormatSet() && !template.isTimeFormatSet()) { template.setTimeFormat(getTimeFormat()); } if (isTimeZoneSet() && !template.isTimeZoneSet()) { template.setTimeZone(getTimeZone()); } if (isURLEscapingCharsetSet() && !template.isURLEscapingCharsetSet()) { template.setURLEscapingCharset(getURLEscapingCharset()); } if (isLazyImportsSet() && !template.isLazyImportsSet()) { template.setLazyImports(getLazyImports()); } if (isLazyAutoImportsSet() && !template.isLazyAutoImportsSet()) { template.setLazyAutoImports(getLazyAutoImports()); } if (isAutoImportsSet()) { // Regarding the order of the maps in the merge: // - Existing template-level imports have precedence over those coming from the TC (just as with the others // apply()-ed settings), thus for clashing import prefixes they must win. // - Template-level imports count as more specific, and so come after the more generic ones from TC. template.setAutoImports(mergeMaps(getAutoImports(), template.getAutoImportsWithoutFallback(), true)); } if (isAutoIncludesSet()) { template.setAutoIncludes(mergeLists(getAutoIncludes(), template.getAutoIncludesWithoutFallback())); } copyDirectCustomAttributes(template, false); } /** * See {@link Configuration#setTagSyntax(int)}. */ public void setTagSyntax(int tagSyntax) { _TemplateAPI.valideTagSyntaxValue(tagSyntax); this.tagSyntax = Integer.valueOf(tagSyntax); } /** * The getter pair of {@link #setTagSyntax(int)}. */ public int getTagSyntax() { return tagSyntax != null ? tagSyntax.intValue() : getNonNullParentConfiguration().getTagSyntax(); } /** * Tells if this setting is set directly in this object or its value is coming from the {@link #getParent() parent}. */ public boolean isTagSyntaxSet() { return tagSyntax != null; } /** * See {@link Configuration#setInterpolationSyntax(int)}. */ public void setInterpolationSyntax(int interpolationSyntax) { _TemplateAPI.valideInterpolationSyntaxValue(interpolationSyntax); this.interpolationSyntax = Integer.valueOf(interpolationSyntax); } /** * The getter pair of {@link #setInterpolationSyntax(int)}. */ public int getInterpolationSyntax() { return interpolationSyntax != null ? interpolationSyntax.intValue() : getNonNullParentConfiguration().getInterpolationSyntax(); } /** * Tells if this setting is set directly in this object or its value is coming from the {@link #getParent() parent}. */ public boolean isInterpolationSyntaxSet() { return interpolationSyntax != null; } /** * See {@link Configuration#setNamingConvention(int)}. */ public void setNamingConvention(int namingConvention) { _TemplateAPI.validateNamingConventionValue(namingConvention); this.namingConvention = Integer.valueOf(namingConvention); } /** * The getter pair of {@link #setNamingConvention(int)}. */ public int getNamingConvention() { return namingConvention != null ? namingConvention.intValue() : getNonNullParentConfiguration().getNamingConvention(); } /** * Tells if this setting is set directly in this object or its value is coming from the {@link #getParent() parent}. */ public boolean isNamingConventionSet() { return namingConvention != null; } /** * See {@link Configuration#setWhitespaceStripping(boolean)}. */ public void setWhitespaceStripping(boolean whitespaceStripping) { this.whitespaceStripping = Boolean.valueOf(whitespaceStripping); } /** * The getter pair of {@link #getWhitespaceStripping()}. */ public boolean getWhitespaceStripping() { return whitespaceStripping != null ? whitespaceStripping.booleanValue() : getNonNullParentConfiguration().getWhitespaceStripping(); } /** * Tells if this setting is set directly in this object or its value is coming from the {@link #getParent() parent}. */ public boolean isWhitespaceStrippingSet() { return whitespaceStripping != null; } /** * Sets the output format of the template; see {@link Configuration#setAutoEscapingPolicy(int)} for more. */ public void setAutoEscapingPolicy(int autoEscapingPolicy) { _TemplateAPI.validateAutoEscapingPolicyValue(autoEscapingPolicy); this.autoEscapingPolicy = Integer.valueOf(autoEscapingPolicy); } /** * The getter pair of {@link #setAutoEscapingPolicy(int)}. */ public int getAutoEscapingPolicy() { return autoEscapingPolicy != null ? autoEscapingPolicy.intValue() : getNonNullParentConfiguration().getAutoEscapingPolicy(); } /** * Tells if this setting is set directly in this object or its value is coming from the {@link #getParent() parent}. */ public boolean isAutoEscapingPolicySet() { return autoEscapingPolicy != null; } /** * Sets the output format of the template; see {@link Configuration#setOutputFormat(OutputFormat)} for more. */ public void setOutputFormat(OutputFormat outputFormat) { NullArgumentException.check("outputFormat", outputFormat); this.outputFormat = outputFormat; } /** * The getter pair of {@link #setOutputFormat(OutputFormat)}. */ public OutputFormat getOutputFormat() { return outputFormat != null ? outputFormat : getNonNullParentConfiguration().getOutputFormat(); } /** * Tells if this setting is set directly in this object or its value is coming from the {@link #getParent() parent}. */ public boolean isOutputFormatSet() { return outputFormat != null; } /** * See {@link Configuration#setRecognizeStandardFileExtensions(boolean)}. */ public void setRecognizeStandardFileExtensions(boolean recognizeStandardFileExtensions) { this.recognizeStandardFileExtensions = Boolean.valueOf(recognizeStandardFileExtensions); } /** * Getter pair of {@link #setRecognizeStandardFileExtensions(boolean)}. */ public boolean getRecognizeStandardFileExtensions() { return recognizeStandardFileExtensions != null ? recognizeStandardFileExtensions.booleanValue() : getNonNullParentConfiguration().getRecognizeStandardFileExtensions(); } /** * Tells if this setting is set directly in this object or its value is coming from the {@link #getParent() parent}. */ public boolean isRecognizeStandardFileExtensionsSet() { return recognizeStandardFileExtensions != null; } /** * See {@link Configuration#setStrictSyntaxMode(boolean)}. */ public void setStrictSyntaxMode(boolean strictSyntaxMode) { this.strictSyntaxMode = Boolean.valueOf(strictSyntaxMode); } /** * The getter pair of {@link #setStrictSyntaxMode(boolean)}. */ public boolean getStrictSyntaxMode() { return strictSyntaxMode != null ? strictSyntaxMode.booleanValue() : getNonNullParentConfiguration().getStrictSyntaxMode(); } /** * Tells if this setting is set directly in this object or its value is coming from the {@link #getParent() parent}. */ public boolean isStrictSyntaxModeSet() { return strictSyntaxMode != null; } @Override public void setStrictBeanModels(boolean strict) { throw new UnsupportedOperationException( "Setting strictBeanModels on " + TemplateConfiguration.class.getSimpleName() + " level isn't supported."); } public String getEncoding() { return encoding != null ? encoding : getNonNullParentConfiguration().getDefaultEncoding(); } /** * When the standard template loading/caching mechanism is used, this forces the charset used for reading the * template "file", overriding everything but the encoding coming from the {@code #ftl} header. This setting * overrides the locale-specific encodings set via {@link Configuration#setEncoding(java.util.Locale, String)}. It * also overrides the {@code encoding} parameter of {@link Configuration#getTemplate(String, String)} (and of its * overloads) and the {@code encoding} parameter of the {@code #include} directive. This works like that because * specifying the encoding where you are requesting the template is error prone and deprecated. * *

* If you are developing your own template loading/caching mechanism instead of the standard one, note that the * above behavior is not guaranteed by this class alone; you have to ensure it. Also, read the note on * {@code encoding} in the documentation of {@link #apply(Template)}. */ public void setEncoding(String encoding) { NullArgumentException.check("encoding", encoding); this.encoding = encoding; } public boolean isEncodingSet() { return encoding != null; } /** * See {@link Configuration#setTabSize(int)}. * * @since 2.3.25 */ public void setTabSize(int tabSize) { this.tabSize = Integer.valueOf(tabSize); } /** * Getter pair of {@link #setTabSize(int)}. * * @since 2.3.25 */ public int getTabSize() { return tabSize != null ? tabSize.intValue() : getNonNullParentConfiguration().getTabSize(); } /** * Tells if this setting is set directly in this object or its value is coming from the {@link #getParent() parent}. * * @since 2.3.25 */ public boolean isTabSizeSet() { return tabSize != null; } /** * Returns {@link Configuration#getIncompatibleImprovements()} from the parent {@link Configuration}. This mostly * just exist to satisfy the {@link ParserConfiguration} interface. * * @throws IllegalStateException * If the parent configuration wasn't yet set. */ public Version getIncompatibleImprovements() { return getNonNullParentConfiguration().getIncompatibleImprovements(); } private void checkParentConfigurationSet() { if (!parentConfigurationSet) { throw new IllegalStateException("The TemplateConfiguration wasn't associated with a Configuration yet."); } } private boolean hasAnyConfigurableSet() { return isAPIBuiltinEnabledSet() || isArithmeticEngineSet() || isAutoFlushSet() || isAutoImportsSet() || isAutoIncludesSet() || isBooleanFormatSet() || isClassicCompatibleSet() || isCustomDateFormatsSet() || isCustomNumberFormatsSet() || isDateFormatSet() || isDateTimeFormatSet() || isLazyImportsSet() || isLazyAutoImportsSet() || isLocaleSet() || isLogTemplateExceptionsSet() || isWrapUncheckedExceptionsSet() || isNewBuiltinClassResolverSet() || isNumberFormatSet() || isObjectWrapperSet() || isOutputEncodingSet() || isShowErrorTipsSet() || isSQLDateAndTimeTimeZoneSet() || isTemplateExceptionHandlerSet() || isAttemptExceptionReporterSet() || isTimeFormatSet() || isTimeZoneSet() || isURLEscapingCharsetSet(); } private Map mergeMaps(Map m1, Map m2, boolean overwriteUpdatesOrder) { if (m1 == null) return m2; if (m2 == null) return m1; if (m1.isEmpty()) return m2; if (m2.isEmpty()) return m1; LinkedHashMap mergedM = new LinkedHashMap((m1.size() + m2.size()) * 4 / 3 + 1, 0.75f); mergedM.putAll(m1); for (Object m2Key : m2.keySet()) { mergedM.remove(m2Key); // So that duplicate keys are moved after m1 keys } mergedM.putAll(m2); return mergedM; } private List mergeLists(List list1, List list2) { if (list1 == null) return list2; if (list2 == null) return list1; if (list1.isEmpty()) return list2; if (list2.isEmpty()) return list1; ArrayList mergedList = new ArrayList(list1.size() + list2.size()); mergedList.addAll(list1); mergedList.addAll(list2); return mergedList; } }





© 2015 - 2024 Weber Informatics LLC | Privacy Policy