litesoft
@ 948
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package org.litesoft.GWT.client.localstorage; import org.litesoft.commonfoundation.annotations.*; import org.litesoft.commonfoundation.iterators.*; import org.litesoft.commonfoundation.typeutils.Objects; import org.litesoft.commonfoundation.typeutils.*; import org.litesoft.core.simpletypes.nonpublic.*; import java.util.*; /** * Local Storage is a Proxy/Adapter to the underlying HTML5 LocalStorage. * <p/> * The exposed API is that of a String to String Map with three important differences: * <li>null keys are NOT supported</li> * <li>null values for values on a <code>put</code> are treated as a call to <code>remove</code></li> * <li>keys are trimmed of their leading and trailing whitespace and if the resulting key is empty it is treated as a null</li> */ public class LocalStorageImpl extends AbstractMap<String, String> implements LocalStorage { private final Html5LocalStorage mHtml5LS; private int mVersion = 0; public LocalStorageImpl( Html5LocalStorage pHtml5LS ) { mHtml5LS = Objects.assertNotNull( "Html5LocalStorage", pHtml5LS ); } public LocalStorageImpl() { this( new Html5LocalStorageImpl() ); } @Override public String get( @NotNull String pKey ) { return innerGet( pKey ); } @Override public String get( Object key ) { return innerGet( keyToString( key ) ); } @Override public int size() { return mHtml5LS.length(); } @Override public void clear() { synchronized ( mHtml5LS ) { if ( mHtml5LS.length() != 0 ) { mHtml5LS.clear(); mVersion++; } } } @Override public String put( @NotNull String pKey, @Nullable String pValue ) { synchronized ( mHtml5LS ) { String zPrevValue = mHtml5LS.getItem( pKey = normalize( pKey ) ); if ( pValue == null ) { mHtml5LS.removeItem( pKey ); } else if ( !mHtml5LS.setItem( pKey, pValue ) ) { throw new UnsupportedOperationException(); } mVersion++; return zPrevValue; } } @Override public String remove( @NotNull Object key ) { String zKey = keyToString( key ); synchronized ( mHtml5LS ) { String zPrevValue = mHtml5LS.getItem( zKey ); if ( zPrevValue != null ) { mHtml5LS.removeItem( zKey ); mVersion++; } return zPrevValue; } } @Override public Set<Entry<String, String>> entrySet() { return new AbstractSet<Entry<String, String>>() { @Override public int size() { return mHtml5LS.length(); } @Override public Iterator<Entry<String, String>> iterator() { return new Iterators.AbstractReadOnly<Entry<String, String>>() { private final int mVersion = getVersion(); private final int mSize = size(); private int mNextIndex = 0; private boolean versionOK() { return mVersion == getVersion(); } private boolean indexOK() { return mNextIndex < mSize; } @Override public boolean hasNext() { synchronized ( mHtml5LS ) { return versionOK() && indexOK(); } } @Override public Entry<String, String> next() { synchronized ( mHtml5LS ) { if ( !versionOK() ) { throw new ConcurrentModificationException(); } if ( !indexOK() ) { throw new NoSuchElementException(); } String zKey = mHtml5LS.key( mNextIndex++ ); return new OurEntry( zKey, mHtml5LS.getItem( zKey ) ); } } }; } }; } private int getVersion() { return mVersion; } private String innerGet( String pKey ) { return mHtml5LS.getItem( Strings.assertNotNullNotEmpty( "Key", pKey ) ); } private String keyToString( Object pKey ) { if ( (pKey == null) || (pKey instanceof String) ) { return normalize( (String) pKey ); } throw new IllegalArgumentException( "Key not a String, but a: " + Objects.justSimpleName( pKey ) ); } private String normalize( String pKey ) { return Strings.assertNotNullNotEmpty( "Key", pKey ); } /** * Keys & Values can't be null! */ private static class OurEntry implements Entry<String, String> { private final String mKey; private final String mValue; public OurEntry( String pKey, String pValue ) { this.mKey = pKey; this.mValue = pValue; } @Override public String getKey() { return mKey; } @Override public String getValue() { return mValue; } @Override public String setValue( String value ) { throw new UnsupportedOperationException(); } public boolean equals( Object o ) { return (this == o) || ((o instanceof Map.Entry) && equals( (Map.Entry) o )); } public boolean equals( Map.Entry them ) { return (this == them) || // ((them != null) && // mKey.equals( them.getKey() ) && // mValue.equals( them.getValue() )); } public int hashCode() { return EqualSupport.hashCodeEm( mKey.hashCode(), mValue.hashCode() ); } public java.lang.String toString() { return mKey + "=" + mValue; } } } |
Commits for litesoft/trunk/Java/GWT/Client/src/org/litesoft/GWT/client/localstorage/LocalStorageImpl.java
Revision | Author | Commited | Message |
---|---|---|---|
948 Diff | GeorgeS | Sat 07 Jun, 2014 23:42:39 +0000 | Jusefuls Formatter Updated to New Code Format |
947 Diff | GeorgeS | Fri 06 Jun, 2014 23:36:56 +0000 | Correct Spelling of package! |
939 Diff | GeorgeS | Mon 02 Jun, 2014 21:30:31 +0000 | Extracting commonfoundation |
917 Diff | GeorgeS | Sun 08 Dec, 2013 20:49:56 +0000 | 1.7 prep & VersionedStaticContentFilter upgrade to new “/ver” model! |
821 Diff | GeorgeS | Sun 19 Aug, 2012 00:08:41 +0000 | |
811 Diff | GeorgeS | Sat 18 Aug, 2012 13:45:18 +0000 | |
804 Diff | GeorgeS | Wed 15 Aug, 2012 12:48:51 +0000 | |
777 Diff | GeorgeS | Mon 16 Jul, 2012 00:48:01 +0000 | |
765 Diff | GeorgeS | Sat 14 Jul, 2012 15:06:46 +0000 | ! |
764 | GeorgeS | Thu 12 Jul, 2012 14:22:25 +0000 |